SEE Learning Initiative-2080 Edited and complied by: Narayan Prasad Sapkota Teacher I Educator I Trainer I Writer 9843087232 , [email protected] www.narayansapkota.com
Model set-1 Section A Multiple choice question. 10x1=10 1. Circle the correct alternatives for the following questions. a. What is the effect of prolonged use of mobile phone of to the person? i. More intellectual ii. Physically fit iii. Isolated iv. Educated b. Puspa while examining two plants A and B in the kitchen garden found that both were flowering plants. Plant A had flat leaves but Plant B had long, narrow sword shaped leaves. i. Plant A is dicot plant, B is monocot plant ii. Plant A is monocot and plant B is dicot plant iii. Plant A is Bryophyta and B is Tracheophyte iv. Both plant A and B are gymnosperms c. Which of the following groups is a group of endangered animals? i. Swamp deer, Asiatic wild elephant, stripped hyena ii. Asiatic wild elephant, stripped hyena, jackal iii. Antelope, tiger, leopard iv. Asiatic wild elephant, tiger, bear d. The radius of the earth is 6380 km and the height of Mt. Everest is 8848 m. If the value of acceleration due to gravity on the top of Mt. Everest is 9.77 m/s², what is the value of acceleration due to gravity on the surface of the earth and also What is the weight of a body of mass 100 kg on the top of Mt. Everest? i. g=9.8m/s2 , W=980.5N ii. g=25m/s2 , W=2500N iii. g=4m/s2 , W=400N iv. g=1.67m/s2 , W=160N e. A boat entered sea water from river water. Less part of the boat sinks in sea water because .............................. i. the density of sea water is more than river water ii. the upthrust of sea water is more than river water iii. the volume of sea water is more than river water iv. the pressure of sea water is more than river water f. The characteristics of the image formed in the given ray diagram are i. Real, erect, enlarged ii. Virtual, inverted, diminished iii. Virtual, erect, diminished iv. Virtual, inverted, enlarged g. After trillions of years, all the galaxies in our local Group will have coalesced into ………….. i. one big star ii. one big object iii. one small object iv. one medium h. The process where technology, programs or processes are applied to minimize human intervention is …………….....…. i. Automation ii. Robotics iii. Connectivity iv. Mapping i. Which of the following reaction is a neutralization reaction? i. Reaction between Sulphuric acid and Sodium hydroxide ii. Reaction between Magnesium and Oxygen iii. Reaction between Iron and Copper sulphate iv. Reaction between Potassium and Chlorine
j. Given below are statements related to ammonia gas. a. The ammonia gas is prepared by heating NH4Cl and Ca(OH)2 in the ratio 2:1. b. The ammonia gas is lighter than air c. Ammonia is highly soluble in water d. Ammonia gas does not have smell a. a,b and c are correct b. a,b are correct c and d are incorrect c. a,b,c are correct , d is incorrect d. all are correct Section B 2. Give very short answer to the given questions: 9x1=9 a. What is controlled variable? b. State Pascal’s law. c. The red ray lies at the top and violet ray lies at the bottom during dispersion of white ray of light through the prism. What is the reason behind this fact? d. In the given device, if we rotate the magnet faster, we could see bulb glowing brighter and if we rotate slower the brightness of the bulb is slower, what might be the reason behind it? e. Write one difference between open and flat universe. f. When carbon react with hydrogen it forms CH4 but when carbon react with oxygen it forms CO2, what might be the valency of the carbon in CO2? g. What is homologous series? h. DDT is harmful insecticide, it Should BE replaced by other, why? i. In the laboratory Pratik chose electro-refining process to purify copper obtained from reduction process. He connected impure copper to negative terminal of cell and pure copper to positive terminal of cell and copper sulphate is used as electroplating. What is the mistake he made in this process? Section C Give very short answer to the given questions: 14x2=28 1. Write are two ways to manage digital reputation. 2. Write two bases of classifying bat into Mammalia. 3. Study the concept map and name A and B. 4. Mating of black and brown dogs takes place and all the offspring produced in F1–generation are black. Why isn’t there brown offspring? 5. Now a days, to improve the local breed cross-breeding is popularly done but some people argue that it will help to extinct the indigenous pure species. What do you think the advantage and disadvantage of cross breed? 6. Phanindra experienced sudden discomfort in his left part of the chest and was taken in the hospital, doctor suggested that he might have minor heart attack. What technology is doctor going to use for further detection and what might be the suitable treatment for this type of attack? 7. Many plants are being extinct in Nepal due to climate change. What role can you play to protect such plants? Write any two roles. 8. Write two conditions required for weightlessness. 9. In the figure given below the events are shown, what might be the reason that the coin fell first in first case, and then in the second case both the coin and feather fell at the same time? 10. In a transformer, the number of turns in the primary coil is 1000 and that in the secondary coil is 2500. If the primary voltage is 440 V, calculate the secondary voltage. What is the type of transformer? 11. Write two differences between generator and electric motor. 12. In your opinion, what might be the future of the universe: open, flat or closed? Explain your answer with suitable arguments. 13. Electronic configuration of two elements is given below. Study the configuration and answer the following questions: A → 1s2 , 2s2 , 2p4 B → 1s2 , 2s2 ,2p6 , 3s1 Which block of periodic table does element ‘B’ belong to and what is its valency? 14. The aqueous solution of chemical A converts blue litmus into red and that of B converts red litmus into blue. When chemicals A and B are Honey Bee Fertile B…………. A………… ……… Parthenogenesis Fertilization
reacted, the product becomes neutral to indicators. Now, identify the chemicals A and B. Section D Very long answer questions 7x4=28 15. The result obtained by crossing a black rat with a white rat is shown in the given checker board. On this basis, answer the following questions. i. Which filial generation does this result belong to? ii. Write down the ratio of dominant and recessive characteristics. iii. Which one is pure black rat? iv. What is the percentage of hybrid? 16. Study the given diagram and answer the following questions. a. Name the type of circulation of blood. b. Which blood vessel is B? c. Which blood vessel carries blood from heart to lungs? d. Which is only vein which carry oxygenated blood? 17. Answer the following questions on the basis of given ray diagram. a. Name the rays A and B. b. Which ray has more speed (A or B) in the glass medium? c. Which phenomenon is shown in the given diagram? d. Ray B is bending more than the ray A. What is the reason behind it? 18. Given below is the graphical representation of two types current. Study them and answer the following questions. (a) (b) a. The use of current (a) would be limited if transformer was not invented. Why? (2) b. Write two differences between the current (a) and (b). (2) 19. One day, Mandiga got one message that she had won lottery of 25 lakh. She was asked to click the link and fill up the bank details. a. Is it safe to do by Mandiga as per the message in the WhatsApp? (1) b. Use of online is beneficial but it is dangerous too, suggest two ways to have good netizenship? (2) c. How do you suggest her to be safe from internet such kinds of internet phising? (1) 20. Answer the following questions on the basis of the table. a. Which blocks of periodic table do the element ‘A’ and ‘B’ belong to? Why?
b. What are the valencies of elements ‘B’ and ‘D’? Why? 21. You are given egg shells and dilute hydrochloric acid, which gas do you prepare? Draw figure for the process and write reaction involved for it. The End Model set-2 Section A Multiple choice question. 10x1=10 1. Circle the correct alternatives for the following questions. a. Which signal represents the digital signal? i. Sine Wave ii. Cosine wave iii. Square wave iv. Round and external parasite b. Why is tapeworm kept in Platyhelminthes? i. It is internal parasite and flat in structure ‘ ii. It is round and it is internal parasite iii. It is round and it is external parasite iv. It is flat and it is external parasite c. Which statement is correct for the least developed group of plants having the vascular bundle? i. Alternation of generation occurs in life cycle and needs water for fertilization ii. Body is thallus and can be prepared food by the help of sunlight iii. Life cycle has alternation of generation and sori are present in the back of the leaf iv. Life cycle has not alternation of generation and food is obtained from decayed material d. Due to which character of the plant shown in the figure is used for the medicine of infective diseases? i. Good smell is produced from this plant ii. It has anti-microbial nature iii. It supplies energy to the people iv. It decreases blood pressure e. What change in gravitation between any two objects takes place if mass of both objects are double and distance is halved? i. Force is increased by 8 times ii. Force is increased by 4 times iii. Force is decreased by 4 times iv. Force is increased by 16 times f. The weight of an object in air is 20N and it decreases to 16N when dipped inside the water. What is upthrust of the water? Real, erect, enlarged i. 20N ii. 16N iii. 4N iv. 36N g. What is Hubble’s observation conclusion? i. Stars are also in motion ii. Galaxies travel faster iii. Universe is expanding iv. There are many galaxies around us h. Heat increases rate of chemical reaction because of i. Heat causes vibration of molecules of reactants ii. Heat stops the vibration of molecules of reactants iii. Heat acts like catalyst iv. Heat increases the volume of reactants i. It is found that diamond is brighter than other substances. It is due to ….. i. It has high critical angle and less refractive index ii. Its critical angle and refractive index are less iii. Its critical angle and refractive index are both high iv. Its critical angle is less and refractive index is high j. Nepal government imported DDT in 1952 to control mosquitoes. However, it is banned in Nepal at present. The two arguments of a student for this activity of government are given below: i. DDT should be used to destroy mosquito and other insects ii. Instead of DDT, other eco-friendly insecticides should be used a. Both arguments are wrong b. Argument i is correct, argument ii is incorrect c. Argument ii is correct but argument I is wrong d. Both arguments are correct Section B 2. Give very short answer to the given questions: 9x1=9 a. In scientific study, why should be researchers get the information about the variables?
b. Write law of floatation. c. What nature of layers of air is playing role in listening to the sound clearer and up to more distance at night? d. Ram is passing a beam of LASER light through an equilateral triangle as shown in the figure. The rays of light are refracted out from the prism. Under which condition should Ram pass light through the prism so that light will return back to the prism? e. What difference in performance of the given device is seen if the distance between two magnets is reduced? f. Under what condition can an open universe be hypothesized? g. What is meant by concentration in metallurgy? h. Industries extract the metals from chief ore among different ores. What will happen if they extract the metal from the ore other than chief ore? i. Write a difference between ethane and ethene on the basis of their reactivity. Section C Give very short answer to the given questions: 14x2=28 3. Check the correctness of the given formula P= mv2 . 4. Write name of two organism which have external fertilization. 5. Write the name of A and B. A and B 5.5 days royal jelly for larva 3 days royal jelly for larva Fertilized egg of honey bee A ……………… Unfertilized egg of honey bee …………… B 6. Why is meiosis cell division is called reductional cell division? 7. Draw the structure of chromosome and label centromere. 8. Write two reasons of increasing blood pressure in the people at this time? 9. Cordyceps sinensis is one of the important medicinal fungus found in the mountain region of Nepal. Write its two importance. 10. If the radius of the earth is R and mass is M, express the acceleration due to gravity on the surface of the earth in terms of density of the earth d and radius R and gravitational constant G. 11. Write two reasons to occur mutual induction in a transformer. 12. The strength of the instrument shown in the figure should be increased by keeping the voltage supplied constant. Write any two processes of increasing its strength. 13. Write two laws of Faraday’s laws of electromagnetic induction. 14. In two beakers A and B, 50 gm of copper sulphate is kept in beaker A and 100gm of copper sulphate is kept in beaker B. if two iron nails of same shape, size and mass are kept in both beakers for some time, after some interval of time, which nail increase by more weight, why?
15. A hydrocarbon is made by 2 carbon,5 hydrogen and one hydroxide radical. Answer the following questions on the basis of given information. a. Write the structural formula of given hydrocarbon. b. Write the IUPAC name of compound formed by removing the hydroxide radical from mentioned compound. 16. Government has researched many times about Sajiwan to extract the oil from its seed to use as fuel. What suggestions do you suggest for the practical use of Sajiwan oil as fuel? Section D Very long answer questions 7x4=28 17. The website : https://www.esafety.gov.au/key-issues/stayingsafe/digital-reputation writes that ..... Digital reputation is the digital footprint created by all the things you say and do online, as well as what others post about you. The people and sites you follow, the content you post, like or share, and the comments you make, all contribute to your digital reputation. a. Why is digital reputation important in day to day to life? b. Write any two negative impacts of digital reputation. 18. A figure related to modern technology is shown in the figure. a. Name the technology. b. What is done in this technology? c. Write any two uses of this technology. 19. Write any two causes and two preventive measures of heart attack. 20. Three Liquids A, B and C having equal mass are taken in three sized beakers and exposed to sunlight, after 10 minutes the increased temperature in each is given below. Liquid Temperature (⁰C) A 10 B 8 C 6 a. Which liquid has highest specific heat capacity and why? b. Which liquid will gain more heat if all three liquids are heated upto 50⁰C? c. Among the 3 liquids which liquid is closely related to water on the basis of specific heat capacity? 21. Write the answer of the following for the total internal reflection. a. Required two conditions. b. Two applications in our daily life. 22. A group of elements having similar characteristics is given below H, Li,Na,K a. In which do these elements belong? b. Among Na and K, K is more reactive, why? c. Are these elements electropositive or electronegative? 23. Draw a well labelled diagram of lab preparation of carbon dioxide gas. Name the acid when this gas reacts with water. The End
Model set-3 Section A Multiple choice question. 10x1=10 1. Circle the correct alternatives for the following questions. a. What is the prolonged effect of use of mobile phone? i. More intellectual ii. Physically fit iii. Isolated iv. Educated b. Class 10 students had a field visit in the nearby forest, students found the structure which information is correct for given plant? i. It has reticulated venation and bisexual ii. It has parallel venation and bisexual iii. It has needle shaped leaves and unisexual iv. It has needle shaped leaves and pollination is done by water c. Why are valves present in the veins? i. To pass the blood easily ii. To protect the veins from external injury iii. To prevent the back flow of the blood iv. To control the high blood pressure d. The amount of air near the surface of the earth is more than at high altitude. This is due to … i. More amount of gravity near the earth surface ii. More temperature near the surface of the earth iii. Due to gravitational force of sun iv. Due to high speed of air near the surface of earth e. Sarthak and Ujjwal have made two different sized parachute models from plastics. If equal load is tied on both and let to drop from the same height, the smaller sized parachute falls earlier than bigger sized, why? i. More upthrust of air on big parachute causes low acceleration ii. More upthrust of air on smaller parachute causes less acceleration iii. Less upthrust of air in big parachute causes more acceleration in it iv. Less upthrust of air in smaller parachute causes less acceleration in it f. The deviation rate of red, green and violet light rays seen during the dispersion of the light through a glass prism are denoted by Dr, Dg and Dv respectively. Similarly, their frequencies are represented by Fr, Fg and Fv respectively. Which order is correct for those deviations and frequencies? i. Dv>Dg>Dr and Fv>Fg>Fr ii. Dr>Dg>Dv and Fv>Fg>Fr iii. Dv>Dg>Dr and Fr>Fg>Fv iv. Dr>Dg>Dv and Fr>Fg>Fv g. In the transformer, the ratio of primary and secondary turn in the transformer is 1:5. Then, which information of transformer given below is correct? i. The primary voltage is more than secondary voltage ii. The primary voltage is equal to secondary voltage iii. It converts high DC voltage to low DC voltage iv. The primary voltage is less than the secondary voltage h. Why is Neon kept in zero group? i. It has no any shell in its atom ii. It has 8 valency iii. It has very small size iv. It has 8 electrons in its outermost shell i. Anushka had grey eyes but her parents have black eyes. What is the reason behind that? i. The parents are hybrid ii. The parents have pure silky hair iii. Grey eyes are recessive character iv. Black eyes are dominant j. A statement and two arguments are given below. Which option is correct for these statements? Statement: fumigants pesticide is that pesticide which produces poisonous fume
Arguments 1: the poison as smoke dissolved in water and that water kill the pests Arguments 2: this type of pesticide is used to kill pests during the storage of agriculture products i. Both statements and arguments are correct ii. Statement and argument 1 are correct, argument 2 is wrong iii. Statement and argument 2 is correct, argument 1 is incorrect iv. Statements and all arguments are incorrect Section B 2. Give very short answer to the given questions: 9x1=9 a. Unique wanted to study effect of temperature on the solubility of the substance, in this research write any two variables that should be controlled. b. What kind of transmission is it when two computers are connected with each other and one send data to other computer by cable? c. What is the relation between the weight of the balloon and upthrust of air when a balloon is floating in Air at certain height? d. A body with 40⁰ C is made in contact with second body with 60⁰C, in which direction heat will flow? e. Complete the given diagram f. Which law is illustrated by given figure? g. Represent the Hubble’s study in simple graph that includes recessional velocity with distance. h. Name the chief ore of ore with molecular formula. i. A compound with general formula CnH2n where n=2 , name the compound. Section C Give very short answer to the given questions: 14x2=28 3. Write any two characteristics of tracheophytes. 4. Complete the following concept map. 5. The production of mustard increased when a farmer had bee farming. Why? 6. A certain type of breeding is shown in the diagram. a. What type of breeding is this? b. Write an advantage of this type of breeding? 7. Read the text and answer the following questions. Animal ............ Animal having mammary glands types of fertilization ................... A B A C A D A E F
More than a century of burning fossil fuels as well as unequal and unsustainable energy and land use have led to global warming of 1.1°C above pre -industrial levels. This has resulted in more frequent and more intense extreme weather events that have caused increasingly dangerous impacts on nature and people in every region of the world. But there are multiple, feasible and effective options to reduce greenhouse gas emissions and adapt to human-caused climate change, and they are available now, said scientists in this IPCC report. Taking effective and equitable climate action will not only reduce losses and damages for nature and people, it will also provide wider benefits, the report points out, underscoring the urgency of taking more ambitious action now to secure a livable sustainable future for all. a. What is the main cause of climate change? b. What could be done to solve this problem? 8. Write two reasons of extinction of wild animals. 9. What are the lower fixed point and upper fixed point in degree Celsius in simple thermometer? 10. Complete the given concept map by filling in boxes. Device A Device B 220v AC 12v DC 12v 11. Why do planets not collage when they revolve around their orbits? 12. The electronic configuration of the valence shell of the element is shown below. What should be the value of x in the given electronic configuration and write the period to which it belongs? Xs2 3p5 13. A chemical is produced due to fermentation of grains with the help of yeast. Write two uses of the chemical. 14. How does catalyst alter rate of chemical reactions? 15. What is the force at piston A? 16. What are the two ways to maintain chemical pollution? Section D Very long answer questions 7x4=28 17. An educationist wanted to prepare one awareness video about the excessive use of mobile phones on the children. What are four things to be included in the video? c. Why is digital reputation important in day to day to life? d. Write any two negative impacts of digital reputation. 18. Based on the concept of sperm formation in the male, complete the concept map.
19. Write one function each of RBC, WBC, Platelets and Plasma. 20. An iron ball of 200g is kept in the water of 500g at 10⁰C. The final temperature of water becomes 30⁰C. find the initial temperature of iron ball. (specific heat capacity of iron= 470J/kg⁰C) 21. Draw a ray diagram of the of the image formed when an object is kept at 4cm away from the lens having positive power with focal length 2cm. Write a nature of image. 22. Modern periodic table is superior to Mendeleev’s periodic table. Write in points. 23. Write two tests with chemical reactions for CO2 and NH3 gas. The End formatio n of sperm •process ............. •type of cell division .......... •type of cell .......... •same type of cell found in plant ........ •number of daughter cells formed
Model set-4 All the questions are compulsory. Section 'A': Objective Questions [10 x 1 = 10] 1. Choose the best alternative of the following questions. a. The process where technology, programs or processes are applied to minimize human intervention is …………….....…. i. Automation ii. Robotics iii. Connectivity iv. Mapping b. Why is pine kept in gymnosperm? i. It bears flower and produces seed. ii. It bears flower and has pointed leaf iii. It has cone instead of flower and seed is present inside fruit iv. It has cone instead of flower and seed is naked c. When Insha observed specimen in the laboratory, she found that both the organisms were long and streamlined body. She also found that organism A has streamlined body covered with scales and organism B has body covered with feathers and fine hairs. By studying the above characteristics, which statement is true for these organisms? i. Organism A has four chambered heart and B has two chambered heart. ii. Organism A has two chambered heart B has four chambered heart iii. Organism A is oviparous and B is viviparous iv. Organism A has two chambered heart and B has four chambered heart d. How many species of reptiles are endangered in Nepal? i. 27 ii. 3 iii. 9 iv. 5 e. A ball is thrown vertically downwards from the top of a tower. If the ball takes 3 seconds to reach the ground, calculate the height of the tower. i. 22.1m ii. 44.1m iii. 88.2m iv. 19.6m f. A boat entered sea water from river water. Less part of the boat sinks in sea water because .............................. i. The density of sea water is more than river water ii. The upthrust of sea water is more than river water iii. The volume of sea water is more than river water iv. The pressure of sea water is more than river water g. Which of the following is the result obtained from the observation of refraction through a glass slab? i. ⦟i = <e < ⦟r ii. ⦟i> ⦟r = ⦟e iii. ⦟i <e = ⦟r iv. ⦟i = ⦟e> ⦟r h. What is meaning of H in Hubble’s law v= Hd? i. Height ii. Gravitational constant iii. Distance iv. Constant of proportionality i. Magnesium burns in air and forms magnesium oxide. What type of chemical reaction is this? i. combination reaction ii. Decomposition reaction iii. Displacement reaction iv. Acid base reaction j. A statement and two arguments are given below. Statement: Biodegradable pesticides are those that can be broken down into harmless compounds by microbes and other living organisms within a shorter period of time when they come in contact with water, air, light, or heat. Argument 1: These pesticides are safer to use as they are biodegradable Argument 2: These pesticides are banned in the most of the countries. i. Statement and both arguments are wrong ii. Statement and both arguments are right iii. Statement and Argument 1 is right, Argument 2 is wrong iv. Statement is wrong but argument 1 and 2 are right Section 'B':
2. Very Short Questions [9 x 1 = 9] a. Scientific variables are very important in scientific learning. Why? b. State Pascal’s law. c. After examining the eye of a student, a doctor suggested him to use spectacles of power +2D what type of defect is there in his eye? d. Bigyan can see clearly in day time but cannot see clearly at night. What type of defect is this? e. What happen when bar magnet is placed inside solenoid at motion? f. What is big bang theory? g. Write main ore of aluminum? h. In the laboratory Nishan chose electro-refining process to purify copper obtained from reduction process. He connected impure copper to positive terminal of cell and pure copper to negative terminal of cell and sodium chloride is used as electroplating. What is the mistake he made in this process? i. Write a difference between alkane and alkene. Section 'C': Short Questions [14 x 2 = 28] 3. Check the correctness of the formula v 2 = u2 + 2aS 4. Write any two characteristics of the class reptilia. 5. Complete the given concept map. 6. Write two differences between mitosis and meiosis cell division. 7. Draw a chart of the result obtained by crossing red flowered pea plant (RR) and hybrid red flowered pea plant (Rr). 8. White blood cell of Jenny's blood is found 25000 after examining her blood. What are the possible causes of this? Write any two causes. 9. Nepal is very much rich in medicinal herbs, but many people don’t use them properly. What might be the causes behind this? Write in two points. 10. Write any two consequences of gravitational force. 11. The mass of the Jupiter is 1.9 × 1027 kg and its radius is 7.1 × 104 km. Calculate the acceleration due to gravity on the surface of the Jupiter. 12. In a transformer, the number of turns in the primary coil is 100 times less than that in the secondary coil. If the secondary voltage is 33000V, calculate the primary voltage. 13. Draw a figure showing magnetic field around a solenoid. 14. Suppose equal volume of hydrochloric acid is kept in two beakers A and B. 2.5 gram of zinc granules and 2.5 gram of zinc powder was added simultaneously. In which case the reaction will take place faster? Write with reason. 15. The property and use of a hydrocarbon compound in the given table below. Property use Colourless having characteristic smell Used as alcoholic beverage a. Write the IUPAC name of the compound. b. Write the name of hydrocarbon from which it is formed with structural formula. 16. In the journal an article published highlights ……… Exposure to pesticides has been growing as a major public health challenge in developing countries. Overuse and misuse of pesticides have several acute and chronic adverse health consequences. Organophosphate insecticide is commonly used pesticide in Nepal which inhibits the neurotransmitter acetyl cholinesterase and affects the central and peripheral nervous system. Organophosphate and organochlorine affect the endocrine system which can lead to diabetes mellitus. ………………. a. Write an effect seen in human health except above mentioned by such chemical b. What are mitigating measures to be followed for the optimum use of pesticides? Section 'D': Long Questions [7 x 4 = 28] Honey bee larva royal jelly all the time A hatched from fertilized egg B royal jelly for 3 day+ 3 day bee bread
17. A blog published in https://www.techtarget.com/whatis/definition/digital-wellbeing writes Digital wellness (digital wellbeing) is the use of technology to ensure an employee's physical and mental health. Although workers rely on their digital devices and the internet to perform their jobs, the aim of digital wellness is to design technology in such a way that it promotes healthy use and proactively assists the user to maintain a healthy lifestyle. A common example of technology that can have a negative effect on employees is the overuse of social media during the workday. a. What is digital well- being? b. What are two advantages of digital well -being? c. How does it help to maintain work life balance? 18. Read the following passage and answer the following questions. In 1784, the first artificial insemination in a dog was reported by the scientist Lazzaro Spallanzani (Italian physiologist, 1729- 1799). This insemination resulted in the birth of three puppy’s 62 days later (Belonoschkin, 1956; Zorgniotti, 1975). It is believed that Spallanzani was the first to report the effects of cooling on human sperm when he noted, in 1776, that sperm cooled by snow became motionless. The first documented application of artificial insemination in human was done in London in the 1770s by John Hunter, which has been called in medical history the “the founder of scientific surgery”. A cloth merchant with severe hypospadias was advised to collect the semen (which escaped during coitus) in a warmed syringe and inject the sample into the vagina. a. What are the positive effects of AI? b. How has this artificial insemination adopted in human being? Describe. c. Some people criticize this method. Why do you think? And what’s your view on it? 19. Write any two symptoms of heart attack and any two preventive measures. 20. Study the given diagram and answer the following questions: a. In which case there will be more rise of temperature if equal amount of oil and water are heated? b. Which has more amount of heat if 100 gm of each oil and water are heated to 100⁰C? c. Which liquid might get cooled faster. Why? 21. Answer the following questions: a. Write two differences between myopia and hypermetropia. b. The speed of light changes when it travels from one medium to another medium. Why? 22. Answer the following questions on the basis of the table: a. Which blocks of periodic table do the element ‘A’ and ‘B’ belong to? b. What are the valencies of elements ‘B’ and ‘D’? 23. Draw well labeled diagram of laboratory preparation of ammonia gas and write down a method to test this gas in the gas jar. The End!
Model set-5 (second term exam) All the questions are compulsory. Section 'A': Objective Questions [10 x 1 = 10] Choose the best alternative of the following questions. 1.Which of the following is a derived unit? a. Kilogram b. Hertz c. Meter d. Mole 2. Why is juniper kept in gymnosperm? a. Because it bears cones instead of flowers and seeds are naked without fruit. b. Because it bears flowers and has needle-like leaves. c. Because it bears flowers and produces seed. d. Because seeds are enclosed in fruit and found in cold region. 3. Study the following table. Column A Column B i. Pigeon 1. Four-chambered heart ii. Sea horse 2. Pneumatic bones iii. Crocodile 3. Air sacs are present in the body iv. Man 4. Poikilothermic organism v. Salamander 5. Mammary glands Which of the following pair is perfectly matched? a.i-1,ii-3,iii-2,iv-5,v4 b. i-2,ii-3,iii-4,iv-5,v-1 c. i-2,ii-3,iii-1,iv-5,v-4 d. i-3,ii-4,iii-1,iv-5,v-2 4. In which group of plants does Tinospora cordifolia belong? a.Endangered b. Timber c. Ornamental d. Medicinal 5. If the mass and radius of a celestial body are two times the mass and the radius of the earth respectively, what is the value of acceleration due to gravity of that body? a.9.8 ms-2 b. 4.9 ms-2 c. 19.6 ms-2 d. 10 m/s2 6. When an object is suspended in honey, mustard oil and air using spring balance, the respective weights are found to be X1, X2 and X3. What will be the weight of the object in those medium in decreasing order? a.X1>X2>X3 b.X2>X3>X1 c. X3>X2>X1 d. X1>X3>X2 7. The deviation rate of red, green and violet light rays seen during the dispersion of the light through a glass prism are denoted by Dr, Dg and Dv respectively. Similarly, their frequencies are represented by Fr, Fg and Fv respectively. Which order is correct for those deviations and frequencies? v. Dv>Dg>Dr and Fv>Fg>Fr vi. Dr>Dg>Dv and Fv>Fg>Fr vii. Dv>Dg>Dr and Fr>Fg>Fv viii. Dr>Dg>Dv and Fr>Fg>Fv 8. According to Hubble's theory, which one of the following facts is correct? a. The farther away the galaxies are the more speed they will have. b. The farther away the galaxies are the lesser the speed they will have. c. There is no relation between the speed and distance of galaxies. d. The gravitational force of the galaxies does not affect their speeds. 9. Study the following statements: i. Phosphoric acid is a positive catalyst. ii. Manganese dioxide increases the dissociation rate of potassium chlorate. iii. Acid-base reaction is always double displacement reaction. iv. Double displacement reaction is called neutralization reaction. a. Only 'i' is correct b. Only 'ii' is correct c. Both 'ii' & 'iii' are correct d. Both 'iii' & 'iv' are correct 10. Gas 'A' is formed by limestone and dilute hydrochloric acid. Gas 'B' is formed by lime water and ammonium chloride. Which compound is formed by heating 'A' and 'B' at about 1500°C? a.Carbon dioxide b. Ammonia c.Ammonium carbonate d. Urea Section 'B': Very Short Questions [9 x 1 = 9] 11. What is meant by scientific learning? 12. Identify the pure water and sugar solution from the diagram given below.
13. Write any one condition necessary for total internal reflection of light. 14. Which lens must be used in spectacles to correct the defect of vision given below? 15. What will be the number of turns in the primary coil in the transformer given alongside? 16. India's Chandrayaan-3 has successfully landed on the moon's surface on 23rd of August 2023. After launching a rocket from the earth, the distance of the rocket from the earth increases due to its initial speed but the speed of the rocket decreases due to the force of gravity. Similarly, the gravitational force also goes on decreasing as distance increases. If the effect of gravity became zero before the speed of the rocket become zero, what would be the future of the rocket? 17. Element E1 lies in 3rd period and p-block. Similarly, element E2 lies in 2 nd period and p-block of modern periodic table. While reacting with Sodium, E1 forms NaE1 and E2 forms NaE2. Which has higher electronegativity among E1 and E2? 18. Hydrogen peroxide is not stored in a transparent vessel. Give reason. 19. Name the metal obtained from quartz veins. Section 'C': Short Questions [14 x 2 = 28] 20. V 2 = ut is not a valid relation. Give reason. 21. Distinguish between Ascaris and Taenia in two points. 22. Study the concept map given below and complete it. Fertile Sterile Food Sterile 23. What will happen if meiotic cell division does not occur in the reproductive cell of an organism? Explain. 24. How is sex determined in human beings? Explain. 25. While Khusbu was walking on the road, she saw an old man suffering from chest pain. She rushed him to the hospital. The initial examination suggested that he might have a heart problem. Which test would be appropriate to identify his heart condition? Explain with reason. 26. Look at the picture thoroughly and explain its role in climate change. 27. Show in a diagram how the gravitational force between two bodies varies with their masses and distance between their centres. Bee Parthenogenesis Fertilization 1 2 3 4
28. Write any two differences between weightlessness and freefall. 29. How can we increase the brightness of a bulb connected to the dynamo of a bicycle? Write any two ways. 30. Study the given picture and write what happens in the following situations. i. As a bar magnet is slowly introduced into the solenoid. ii. While introducing the bar magnet rapidly into the solenoid. 31. Though lanthanides and actinides are kept together with other elements in periods, they are kept in different block in modern periodic table. Predict the suitable reason. 32. Mr. Adhikari is going to perform a small activity regarding chemical reaction. For this, he kept AgNO3 in beaker 'A' and KClO3 in beaker 'B'. He kept both the beakers in sunlight for 10 minutes. Which beaker's chemical reduces faster, why? Explain with a suitable reason. 33. A factory is extracting copper from its ore. The ore consists of some volatile impurities. Which method should the factory follow to get pure copper, why? Explain. Section 'D': Long Questions [7 x 4 = 28] 34. Utkrishta wanted to perform an experiment to study effect of temperature on the solubility of the salt. What are the four things need to consider related to variables by him, while finding the correct conclusion of the experiment? 35. A 31 years old woman and her 36 years old husband have been trying to conceive for the past five years. Test of infertility did not show any cause for this. Regular ovulation cycle is normal in her body. Her reproductive tract is also normal, as shown by Hysterosalpingography. Her husband's sperm count is also normal. They are disappointed because they still do not have a child. In this situation, which method should they follow to born their own baby? Explain the procedure of this method with a suitable diagram. 36. Blood circulatory system of human body is showing in the diagram given below. Study the diagram and answer the following questions: i. Name the blood vessels 1 & 2. ii. L.V. has thicker wall than R.V., why? iii.Name the valve present in between R.A. and R.V. iv.What type of blood is carried by 3 and 8? 37. For taking a bath, Alin heated 25 litres water of temperature 15°C by supplying 8.82x103KJ of heat. Then she mixed that hot water with 35 litres cold water of temperature 4°C. Calculate the final temperature of the mixture. (Given: 1litre water = 1kg water) 38. The focal lengths of the two lenses are 20cm and -20cm respectively. Mention the types of these two lenses. Out of these two lenses, which one forms a virtual and magnified image when an object is kept 16cm away from the lens? Explain it by drawing a scaled ray diagram. 39. A portion of periodic table is given below. Answer the questions on the basis of it. IA IIA IIIA IVA VA VIA VIIA VIIIA Na 2.8.1 Mg 2.8.2 Al 2.8.3 Si 2.8.4 P 2.8.5 S 2.8.6 Cl 2.8.7 Ar 2.8.8 a.Which period of modern periodic table is shown in the table? b.What happens to atomic size when moving from left to right in this period?
c.How does reactivity vary when moving from left to right in this period? d.Identify the most reactive metal and most reactive non-metal in this period. 40. Study the diagram given below and answer the following questions. a.What mistake is showing in the diagram? b.What is the mixture of 5% of this gas and 95% of oxygen called? c.What happens when limewater is passed into this gas for a while? d. Draw a corrected diagram. The End!
Model set-6 ( first term examination) Section A Multiple choice question. 10x1=10 1. Circle the correct alternatives for the following questions. a. Which is a dependent variable in the experiment; photosynthesis of plants? i. Amount of sunlight ii. Growth of the plant iii. Moisture present in the soil iv. Size of the leaf b. Which of the fundamental units are involved in the SI unit of resistance, Ohm? i. Kgm2 s -3A -2 ii. KgmsA iii. Kgm-2 s 2A iv. KgmsA2 v. Kg2msA c. Club moss is more developed than moss because v. Club moss is terrestrial vi. Club moss is sporophyte vii. Club moss have xylem and phloem viii. In the alternation of generation sporophyte is dominant d. Here are given two organisms. They lie in same kingdom. What is the main reason of keeping them in single kingdom? i. They are multicellular with different body systems ii. They are multicellular with heterotrophic mode of nutrition iii. They are multicellular and parasitic iv. They are multicellular and oviparous. e. What is the average acceleration due to gravity of the moon? i. 9.78 m/s2 ii. 9.83 m/s2 iii. 1.67 m/s2 iv. 9.8 m/s2 f. If the weight of an object measured in the air, water and glycerine are W1, W2 and W3 respectively. Then weight of the body follows the order. v. W1<W2<W3 vi. W2<W1<W3 vii. W3<W1<W2 viii. W3<W2<W1 g. If the electronic configuration of the elements is 1s2 , 2s2 2p3 then which of the following facts are correct? v. Group IIIA, Valency 3, Period 2 vi. Group VA, valency 5, Period 3 vii. Group VA, Valency 3, Period 2 viii. Group IIA, Valency 5, Period 2 h. Which reactant is X in the given chemical reaction? HCl + X NaCl+ H2O i. KCl ii. H2O iii. NaOH iv. Ca(OH)2 i. Which honey bee has 16 chromosomes? i. Queen bee ii. Drone bee iii. Worker bee iv. Queen bee and worker bee j. While examining a person who did not have babies for a long time, it was found that the person suffered from infertility due high intensity radiation. Which part of the cell might have been affected? i. DNA ii. RNA iii. Nucleolus iv. Cytoplasm
Section B 2. Give very short answer to the given questions: 9x1=9 a. Write a difference between fish and starfish. b. If you are given two plants, how do you identify that whether it is monocot or dicot? c. If an object has weight of 977N on the surface of the earth, what will the weight at the center of the earth? d. In the given figure, what is the upthrust of the liquid? e. What is the group of most reactive metals? f. If you are given an opportunity to correct one defect in the modern periodic table, which correction would you make? g. What are the products when calcium carbonate is heated? Show with reaction. h. If by some reason, the Queen bee is dead, who will control the hive? i. Write a significance of invitro fertilization (IVF). Section C Give very short answer to the given questions: 14x2=26 3. Write SI Unit of Electric current and luminous intensity. 4. Interpret the homogeneity of the equation t= 2Π √/ where t is time period, l is length and g is the acceleration due to gravity. 5. Write two differences between bat and pigeon. 6. Given table shows the characteristics of two categories of the organisms. Category A Category B 1. Body is covered with dry scales 2. Show creeping movements 3. Some of them have adhesive pads on their feet. 1. Body is covered with scales and feather 2. Forelimbs are modified into wings 3. Have hollow bones a. Which of the following category of the organisms are more advanced? b. Interpret why category A have adhesive pads in their feet? 7. Tshering while climbing to Mount Everest found that his weight had decreased and when he returned to Kathmandu and measured the weight found that his weight had increased within few days. Why do you think this had happened? 8. Rabin dropped a stone from a tower of 78 m high. Calculate the time taken by stone to reach the ground. (g=10m/s2 ). 9. Write two uses of Pascal’s Law in our daily life. 10. Two syringes are connected together as shown in the diagram below. A force of 20 N is applied to the piston in syringe A. (a) Calculate the pressure that the piston in syringe A exerts on the oil. (b) Calculate the force needed to just prevent the piston in syringe B from moving out. 11. Write two differences between Mendeleev’s periodic table and Modern Periodic table.
12. An element A forms the compound ACl3 with chlorine, AN with nitrogen and A2O3 with oxygen. Analyze the given information and predict in which group and block of the modern periodic table is it kept. 13. Study the given diagram and answer the following questions: a. In which case there will be more rate of chemical reaction A or B? b. What might be the role of MnO2 in Beaker A? 14. Four chemists started to research on the double displacement reaction. a. Anjita mixed Calcium carbonate and dropped in the sodium chloride solution. b. Monica took silver nitrate solution and sodium chloride solution and mixed them. c. Kismita took magnesium chloride and mixed with sodium chloride solution. d. Alina took hydrochloric acid and mixed in sodium chloride solution. Which of these four scientists do you think will succeed? Write balanced chemical equation for the experiment. 15. A farmer started apiculture in his local area but other people did not want him to have bee farming stating that bee will hamper flowers of mustard plant. What is wrong concept with the other people? How should they be educated? 16. A mother gave birth of three daughters consecutively. Her husband blamed her and wanted to have new marriage so that new wife will give birth of son. Is he right to blame his wife for not having son? What are your suggestions regarding it. Section D Very long answer questions 4x7=28 17. Linnaeus Carolus classified organisms into plantae and animalia kingdom. Robert Harding classified organisms into five kingdom classification; Monera, Protista, fungi, plantae and animalia. a. In what way five kingdom classification is superior to two kingdom classification? b. What is the similarity between fungi and other two kingdoms; plantae and animalia? c. What is the basis of differentiation of organism into plantae and animalia? d. How is knowledge of classification support process of evolution? 18. Robert Boyle performed an experiment in a vacuum to prove that the acceleration produced on every freely falling body remains the same and it does not depend on the mass of the falling body. This famous experiment is commonly known as feather and coin experiment. a. What might be the acceleration of freely falling object? b. What result might be seen if the above experiment was performed in air? c. Why do you think that the acceleration produced in a freely falling object is independent to mass? d. What might be the result if this same experiment was performed on the surface of moon? 19. A person is applying effort in large piston and trying to lift 500N load in small piston. How should he correct the error? Show with the figure that hydraulic system is force multiplier. 20. Three types of compounds are formed by three elements X, Y and Z with chlorine; XCl, YCl2 and ZCl3. a. Which one has more atomic size Y or Z? b. Compare the valency of X and Y. c. What type of bond do Z form in the compound ZCl3? Hydrogen peroxide ------- --------------- ------------- --------- --------- --------- ---- ..---------- ---------- ------ ------- -------- H2O2 +MnO2 A B
d. Why do you think X is more reactive than rest of others Y and Z? 21. Suppose your teacher had given you hydrochloric acid in the beaker and you were asked to mixed lime water in it. On the basis of changes observed answer the following questions. a. Show the chemical process in the form of formula equation. b. How do you become sure about that the reaction has completed? c. Suppose you were asked to perform similar next experiment which chemical would you choose instead of hydrochloric acid? d. This reaction has alternative name too, justify it 22. There are three types of bees; queen, drone and worker bees. a. Which bee is formed from parthenogenesis? b. Which bee feeds only on royal jelly throughout the life? c. Which bee has longest life span? d. Name the flight taken by drone bee and queen bee. 23. Complete the given concept map with A and B and write two differences between two processes A and B. The End Male Female A cell division Sperm Young baby Zygote Ovum Fertilization B cell division
Model set-7 (NPABSON, second terminal examination) All the questions are compulsory. Section 'A': Objective Questions [10 x 1 = 10] 1. Circle the correct alternative of the following questions: a. Which of the following belongs to sub-phylum of vertebrata? i. Hydra ii. Hardamania iii. Hyla iv. Hirudinaria b. What is the correct full form of abbreviation UNFCCC? i. United Nations First Conference on Climate Change ii. United National First Conference on Climate Change iii. United Nations Framework Conference on Climate Change iv. United National Framework Conference on Climate Change c. Choose the correction statement from the following: i. Acceleration due to gravity increases with altitude. ii. Acceleration due to gravity increases with depth. iii. Acceleration due to gravity increases with latitude. iv. Acceleration due to gravity decreases with increasing radius of heavenly body. d. Name the process by which drone bee produced in a bee hive: i. Histogenesis ii. Parthenogenesis iii. Metamorphosis iv. Moulting e. The lab report of three person is given. Which statement is correct by analyzing given report: i. Ram’s report is normal, Shyam is suffering from polycythemia & Bishnu from blood cancer. ii. Ram’s report is normal, Shyam is suffering from leukopenia & Bishnu from thrombocytosis. iii. Shyam’s report is normal, Ram is suffering from polycythemia & Bishnu from blood cancer. iv. Bishnu’s report is normal, Ram is suffering from polycythemia & Shyam from blood cancer. f. What is the melting point of alcohol & boiling point of mercury? i. -39oC & 357oC ii. -117oC & 78oC iii. -117oC & 357oC iv. -39oC & 78oC g. A ray of light is travelling from medium 'X' to medium ‘Y' as shown in diagram i. Ray BO ii. Ray N1N2 iii. Ray AO iv. Ray AOQ h. Which statement is correct for given figure? i. Person’s ciliary muscle is unable to stretch lens without concave lens. ii. Person’s eye near point is at 25cm & far point is at infinity. iii. Person can see far object without concave lens. iv. Person cannot see near object without concave lens. i. Which condition leads the universe to the big crunch? i. If the density of universe is less than critical density. ii.If the density of universe is equal to critical density. iii. If the density of universe is more than critical density. iv. If the density of universe is neither greater nor equal to critical density. j. What happens when CO2 gas is passed through calcium hydroxide? Give reason. i. It turns black due to the formation of soluble calcium carbonate. ii. It turns milky white due to the formation of soluble calcium carbonate. iii. It turns black due to the formation of insoluble calcium carbonate. iv. It turns milky white due to the formation of insoluble calcium carbonate. S.N. RBC WBC Platelets Ram 4.5 M 8 K 250 K Shyam 4.7 M 3 K 380 K Bishnu 6 M 9 K 6 K
Section 'B': . Very short answer type questions. (9x1=9) a. What is the SI unit of force and mention the basic unit involved in it? b. Identify the class of given angiosperms. A B c. State any two natural causes of climate change. d. What is the relation between concentration of reactants and rate of chemical reaction? e. List out any two major steps to be followed to prevent yourselves from heart attack in future. f. What happens when blood group A is transfused to blood group B? g. What is meant by the statement, “The specific heat capacity of ice is 2100J/kg0C”? h. Mention the importance of gravitational force in universe. i. What happens if there were no greenhouse gases in our atmosphere? Group ‘B’ Short answer type questions. (14x2=28) 2. State the significance of variables in scientific research. 3. Both jelly fish and cuttle fish lives in marine water. On the basis of their specific characters determine the more advanced animal between them. Explain. 4. Local people participation is most crucial for the conservation and preservation of rare species in Nepal. Support this statement. 5. Differentiate between G and g on the basis of its definition and value in earth. 6. Suppose that the earth begins to shrink without any change in its mass, will there be any change in the value of acceleration due to gravity? Explain. 7. Compare the value of FA with FB if force is applied on bigger cylinder on the basis of Pascal’s law. 8. The molecular formula of certain compound is AB2. State and justify the group to which element A belongs to periodic table along with any two examples of elements belonging to this group. 9. In chemistry laboratory, Bishnu Gopal mixed 10ml hydrochloric acid and 10ml ammonium hydroxide in test tube. a) What type of chemical reaction takes place in the test tube? b) Write the balanced chemical equation of the above reaction. 10.Eggs of a honey bee present in bee hive X and Y. Determine the conditions do the egg X developed into drone and egg Y into worker. 11. Mr. Bir Bahadur Thapa is 40-year man working as MD in a cooperate house. Last few months onwards he is losing body mass without any efforts, problems like polyuria, polydipsia and blurred vision are also notice. By analyzing the symptoms, state the possible blood related disease he is suffering from along its justification. 12. What happens when we supply heat to water at 40C and cooled same water below 40C? Give answer. 13. Total internal reflection of light is fascinating phenomenon. Mention any two-condition necessary for it to happen. 14. Do you think the spear left by fisher man can hit the fish in water as shown in picture below? Explain it on the basis of real and apparent depth of fish with necessary figure.
15. Write the major any two evidences of Big Bang Theory. Group ‘C’ Long answer type questions. (7x4=28) 16. Density of some substances are given in the table: a) Which material floats on water among them? Explain. b) If volume of all the substance are same then which one will have less mass among them. How? c) If all of them have equal masses, which one will have least volume? How? d) Which law or principle explain all of them? State it. 17. A part of periodic table with the elements placed in the suitable order in shown below. Answer the following questions on the basis of the table. a) What is common name given to group Q? Explain. (0.5+1) b) Compare the reactivity of group P elements along with reason. (0.5+1) c) What compound is formed when Na reacts with Cl? Show its molecular formula by crisscross method. (1) 18. Describe the life cycle of honey bee in short and discuss its any two importance. 19. Define pericardial fluid. Draw a well labelled diagram of internal structure of human heart and show all four valves, auricles and ventricles. 20. Specific heat capacity of two different substances A is 910J/kg0C and B is 2100 J/kg0C. a) Which substance gets cooler faster, if equal mass of these substances is heated to maintain the same temperature & then they are expose in the air? b) Which will go deeper on keeping equal mass of each with 1000C on a wax slab, why? c) If 4 kg of A at 1750C mixed with 2000g of B at 300C, then calculate its resultant temperature of mixture. 21. If the power of lens is +25D, determine its focal length and draw ray diagram when an object is kept at 7cm away from that lens. Also write down any two natures of image formed by it. 22. Observe the given diagram and answer the following questions. a) Which gas is being collected in the gas jar? Mention its balance chemical reaction. b) State any two confirmatory tests for this gas. c) Why is this gas jar is inverted? d) What happens when drier is not used to collect this gas? The End! Substance Density (kg/m3 ) A 1200 B 1100 C 920 Group P Group Q Li F Na Cl K Br
Model set-8 All the questions are compulsory. Section 'A': Objective Questions [10 x 1 = 10] 1. Choose the best alternative of the following questions. a. Which of the following is the SI unit of density? i. Kg/m ii. Kg/m3 iii. Kgm iv. Kg2m2 b. Why is mango kept in dicot? i. It bears flower and produces seed. ii. It bears flower and has flat leaf iii. It has reticulated venation and tap root iv. It bears fruits and seeds c. When Sujan was ploughing in the kitchen garden, he found two organisms. The organism A was long cylindrical and wanted to hide under the soil and organism B was cylindrical and was short. Both were segmented. The organism B even wanted to stick on the hand of Sujan. i. Organism A lie in Platyhelminthes and B is Annelida. ii. Organism A lie in Arthropoda, B is Annelida iii. Both lie in Platyhelminthes iv. Both lie in Annelida d. What are the causes of climate change?? i. Increase in temperature ii. Green- house effect iii. Deforestation iv. Volcanic eruption e. Calculate the force of gravity of the earth that acts on 1kg object. The mass and radius of the earth are 6×1024kg and 6380km respectively. i. 9.8N ii. 98N iii. 0.98N iv. 980N f. Which of the following is statement of Pascal’s law? i. "The pressure exerted on a confined liquid is transmitted equally and undiminished in all directions throughout the mass of the liquid." ii. "When a body is partially or wholly immersed in a liquid (fluid), it experiences an upthrust (or apparent loss in weight) which is equal to the weight of the liquid (fluid) displaced by it." iii. "When a body floats in a liquid, the weight of the floating body is equal to the weight of the liquid, displaced by it." iv. The magnitude of upthrust is always equal to the weight of the liquid displaced by the immersed part of the body. g. Which of the given formula is used to calculate the power of a lens? i. P= f ii. P= 1/f iii. P= m iv. P=1/m h. When the universe had expanded an additional………………, all the matter we can measure filled a region the size of the solar system. i. 1,0000 times ii. 1,000 times iii. 1,00000 times iv. 1,00 times i. Which of the following is a positive catalyst? i. Glycerol ii. MnO2 iii. Sodium chloride iv. Calcium chloride j. A statement and two arguments are given below. Statement: soaps and detergents are chemical substances which are used for cleansing purpose. Argument 1: soaps are better cleansing agents than detergents Argument 2: detergents are non-biodegradable but good cleansing agents i. Statement and both arguments are wrong ii. Statement and both arguments are right iii. Statement and Argument 1 is right, Argument 2 is wrong iv. Statement is wrong but argument 1 and 2 are right Section 'B': 2. Very Short Questions [9 x 1 = 9] a. Digital citizenship is very important in the modern era.Why? b. Name two devices based on law of floatation. c. After examining the eye of a student, a doctor suggested her to use spectacles of power -1.5D what type of defect is there in his eye? d. write one use of contact lens. e. On what principle is transformer based on?
f. What is Hubble’s law? g. Write main ore of silver. h. Given below is the electrochemical/ refining process. Which chemical is C? i. Write a difference between saturated hydrocarbon and unsaturated hydrocarbon. Section 'C': Short Questions [14 x 2 = 28] 3. Check the correctness of the formula v = u2 + 2aS 4. Write any two characteristics of the class Mammalia. 5. Complete the given table of honey bee. 6. Write two differences between mitosis and meiosis cell division. 7. Draw a chart of the result obtained by crossing red flowered pea plant (RR) and hybrid red flowered pea plant (Rr). 8. White blood cell of Jenny's blood is found 25000 after examining her blood. What are the possible causes of this? Write any two causes. 9. Nepal is very much rich in medicinal herbs, but many people don’t use them properly. What might be the causes behind this? Write in two points. 10. Write any two consequences of gravitational force. 11. The mass of the Jupiter is 1.9 × 1027 kg and its radius is 7.1 × 104 km. Calculate the acceleration due to gravity on the surface of the Jupiter. 12. In a transformer, the number of turns in the primary coil is 100 times less than that in the secondary coil. If the secondary voltage is 33000V, calculate the primary voltage. 13. Draw a figure showing magnetic field around a solenoid. 14. Suppose equal volume of hydrochloric acid is kept in two beakers A and B. 2.5 gram of zinc granules and 2.5 gram of zinc powder was added simultaneously. In which case the reaction will take place faster? Write with reason. 15. The property and use of a hydrocarbon compound in the given table below. Property use Colourless having characteristic smell Used as alcoholic beverage c. Write the IUPAC name of the compound. d. Write the name of hydrocarbon from which it is formed with structural formula. 16. In the journal an article published highlights ……… Exposure to pesticides has been growing as a major public health challenge in developing countries. Overuse and misuse of pesticides have several acute and chronic adverse health consequences. Organophosphate insecticide is commonly used pesticide in Nepal which inhibits the neurotransmitter acetyl cholinesterase and affects the central and peripheral nervous system. Organophosphate and organochlorine affect the endocrine system which can lead to diabetes mellitus. ………………. c. Write an effect seen in human health except above mentioned by such chemical d. What are mitigating measures to be followed for the optimum use of pesticides? Section 'D': Long Questions [7 x 4 = 28] i.A blog published in https://www.techtarget.com/whatis/definition/digital-wellbeing writes Digital wellness (digital wellbeing) is the use of technology to ensure an one's physical and mental health. Although people rely on their digital devices and the internet to perform their jobs, the aim of digital wellness is to design technology in such a way that it promotes healthy use and proactively assists the user to maintain a healthy lifestyle. A common example of technology that can have a negative effect on people is the overuse of social media during the workday. a. What is digital well- being? b. What are two advantages of digital well -being? c. How does it help to maintain work life balance? ii. Read the following passage and answer the following questions. In 1784, the first artificial insemination in a dog was reported by the scientist Lazzaro Spallanzani (Italian physiologist, 1729- 1799). This insemination resulted in the birth of three puppy’s 62
days later (Belonoschkin, 1956; Zorgniotti, 1975). It is believed that Spallanzani was the first to report the effects of cooling on human sperm when he noted, in 1776, that sperm cooled by snow became motionless. The first documented application of artificial insemination in human was done in London in the 1770s by John Hunter, which has been called in medical history the “the founder of scientific surgery”. A cloth merchant with severe hypospadias was advised to collect the semen (which escaped during coitus) in a warmed syringe and inject the sample into the vagina. d. What are the positive effects of AI? e. How has this artificial insemination adopted in human being? Describe. f. Some people criticize this method. Why do you think? And what’s your view on it? iii. Write any two symptoms of heart attack and any two preventive measures. iv. Study the given diagram and answer the following questions: d. In which case there will be more rise of temperature if equal amount of oil and water are heated? e. Which has more amount of heat if 100 gm of each oil and water are heated to 100⁰C? f. Which liquid might get cooled faster. Why? v. Answer the following questions: c. Write two differences between myopia and hypermetropia. d. The speed of light changes when it travels from one medium to another medium. Why? vi. Answer the following questions on the basis of the table : c. Which blocks of periodic table do the element ‘A’ and ‘B’ belong to ? d. What are the valencies of elements ‘B’ and ‘D’? vii. Draw well labeled diagram of laboratory preparation of ammonia gas and write down a method to test this gas in the gas jar. The End!
Model set-9 All the questions are compulsory. Section ‘A’: Objective Questions [10 x 1 = 10] 1. Choose the best alternative of the following questions. a. How much bit equals to 1 Byte? i. 5 ii. 6 iii. 7 iv. 8 b. An organism has mammary glands, respire through lungs but lives in the water. What might be the organism? i. Whale ii. Fish iii. Sea horse iv. Star fish c. Which one of the following is not the function of the DNA? i. DNA is responsible for passing genetic information from parents to their offspring. ii. DNA carries hereditary information in the form of codes arranged in nitrogen bases. iii. DNA gives rise to RNA by the process of transcription. iv. DNA help in protein synthesis d. A girl feels tired while climbing staircase. She is suffering from .... i. Haemophilia ii. Anaemia iii. Uric acid iv. Diabetes e. When a stone and sheet of paper are thrown from certain height, they fall in different time on the surface of earth and fall at same time on the surface of the moon. It is due to i. Weightlessness ii. Acceleration due to gravity iii. Gravity iv. Free fall f. If the weight of body is 10 N on the moon, what will be its weight on the earth? i. 6N ii. 60N iii. 600N iv. 20N g. Distinguish the correct statement based on the characteristics of the image formed by concave and convex lenses. i. Convex lens forms a real, inverted, and diminished image of an object. ii. Concave lens forms a virtual, erect, and diminished image of an object. iii. Convex lens forms a real, inverted, and magnified image of an object. iv. Concave lens forms a virtual, erect, and magnified image of an object. h. Which of the given equipment works on the basic of motor effect? i.Transformer ii.Electric motor iii.Dynamo iv.Generator i. Though Helium has 2 valence electrons, it is kept in group 18 (0 group) because i. It has full filled duplet condition ii. It shows inert behaviour iii. It is chemically inactive iv. All of the above j. A statement and two arguments are given below. Statement: The environment pollution caused by various chemical substances is called chemical pollution. Argument 1: Plastics are non-biodegradable materials. They do not rot and corrode and hence do not cause environment pollution. Argument 2: Plastics are non-biodegradable materials. They do not rot and corrode and hence cause environment pollution. v. Statement and both arguments are wrong vi. Statement and both arguments are right vii. Statement and Argument 1 is right, Argument 2 is wrong viii. Statement is wrong but argument 1 and 2 are right Section 'B': 2. Very Short Questions [9 x 1 = 9] a. Write a difference between analog signal and digital signal. b. What is upthrust? c. To cool hot engines of vehicles, cold water is used. Why?
d. The speed of light in air is 3 × 108 m/s and the refractive index of paraffin is 1.44. What is the speed of light in the paraffin. e. Write a difference between near point and far point of human eye. f. In your opinion, what might be the future of the universe: open, flat or closed? Explain your answer with a suitable argument. g. Write main ore of copper. h. Methane is called marsh gas. Why? i. Draw structural formula of the compound formed by replacing two hydrogen atoms by two OH groups from ethane. Section 'C': Short Questions [14 x 2 = 28] 3. What could be the dependent variable and control variable to be considered to perform an experiment: Effect of temperature on solubility of salt. 4. What are the two classes of sub-division angiosperm. 5. Classify sea cucumber. 6. Write any two differences between queen bee and drone bee. 7. Both the parents were of fair complexation but the child was black coloured. How could it be possible? 8. Red panda and python are called endangered species. 9. Identify the given plant and write one use of it. 10. Write two causes of weightlessness. 11. Three objects with different densities A, B and C are in water as shown in the figure. Now answer the following questions a. Which object has density equal to water? b. If the mass of object A is 1 kg. How much kg of water is displaced by the object? 12. Analyze the working mechanism of given device. 13. Write two differences between open and flat universe. 14. A metallic element X forms a compound XY2 with Y. What might be the valency of X and in which group does it lie? 15. Suppose you are asked to separate metals like mercury from their impurities. Some people suggested to use electro-refining. Is it right way? Which method do you think is the right way? 16. Suppose you are minister for urban development. How would you develop the sustainable plan for the chemical pollution? Section 'D': Long Questions [7 x 4 = 28] 17. Write your plan to make a 5-minute audio-visual material covering the topics included in any one unit under the science and technology of class 10. What can be done to make that audio-visual material of 3 minutes? Write, including, the necessary steps.
18. Is genetic engineering a boon or a bane for the present era? Give your arguments. 19. Write four functions of blood in human body. 20. Study the given figure and answer the following questions. i. What is the direction of heat and why? ii. What will be the equilibrium temperature if stopper is opened, assuming there is no heat gain or loss, in the system? 21. a. Write two differences between concave lens and convex lens. b. The apparent depth of water in a pond appears less than the real depth. Why? 22. Give reason: a. The rate of a chemical reaction increases on increasing temperature, why? b. The rate of a chemical reaction increases on powdering the reactants, why? c. Acid-base reaction is also called neutralization reaction, why? d. Chemical reaction takes place when iron dust is added into copper sulphate solution but no reaction takes place when Copper dust is added into Ferrous sulphate solution. Why? The End!
Model set-10 All the questions are compulsory. Section ‘A’: Objective Questions [10 x 1 = 10] 1. Choose the best alternative of the following questions. i. Digital signal can transmit through …………….....…. i. Optical fibre ii. Infra-red iii. Micro wave iv. All of above b. An organism has minute pores in the whole body, has big opening at top and body is sessile. What might be the organism? i. coral ii. sea anemone iii. hydra iv. liver fluke c. Which one of the following is not the feature of the RNA? i. RNA is found in cytoplasm. ii. It contains ribose sugar. iii. RNA is responsible for protein synthesis. iv. RNA is a double–stranded structure. d. In order to produce good meat, farmers look for Boer goats and cross them with local goats. What kind of breeding method is this? i. Artificial insemination ii. Selective breeding iii. IVF iv. Natural selection e. Which one of the following conclusions is correct while observing a freely falling object every second? i. the distance covered increases uniformly ii. velocity increases uniformly iii. acceleration increases uniformly iv. translation takes place uniformly f. The mass of the earth is 6 × 1027 g and its radius is 6400 km. Calculate the acceleration due to gravity on the surface of the earth. i. 4.9 m/s2 ii. 9.77m/s2 iii. 10m/s2 iv. 5m/s2 g. What is the correct understanding of eye problems and related causes? i. When the lens of the eye becomes cloudy, color blindness occurs. ii. When the focal length of the lens of the eye increases, shortsightedness occurs. iii. When the shape of the surface of the cornea changes, defect in vision is seen. iv. Night blindness occurs due to the weakness of the cone cells of the retina. h. Which scientist discovered the magnetic effect of electric current? i. Michael Faraday ii. Hans Christian Oersted iii. John Ambrose Fleming iv. James Clerk Maxwell i. Given below is the group of elements, they are kept in same group because i. They have 7 valence electrons ii. They all are gases iii. They react with metals to form salts iv. All of the above j. A statement and two arguments are given below. Statement: chemical fertilizers increase the productivity of crops, they supply essential nutrients. Argument 1: Overuse of chemical fertilizers has many negative impacts in the environment Argument 2: It imbalances the ecosystem. i. Statement and both arguments are wrong ii. Statement and both arguments are right iii. Statement and Argument 1 is right, Argument 2 is wrong iv. Statement is wrong but argument 1 and 2 are right Section 'B': 2. Very Short Questions [9 x 1 = 9] a. Write a difference between baseband signal transmission and broadband signal transmission. b. What is hydraulic pressure? c. Why is anomalous expansion of water important for animals of cold countries?
d. Calculate the refractive index of water medium with respect to air if the refractive index of water is 1.33. e. Write a difference between image formed by a convex lens and image formed by a concave lens. f. “Ten billion years from now, what remains of the Earth will be frozen, more than a hundred degrees below zero. Any oxygen or nitrogen gas on the surface (emitted by volcanic activity, perhaps) will be frozen as a frost on the ground”. Do you agree with this statement? Write an argument. g. Write main ore of gold. h. glycerol is used as sweetening agent. Why? i. Draw structural formula of the compound which is used as fuel in gas lighter. Section 'C': Short Questions [14 x 2 = 28] 3. What could be the dependent variable and control variable to be considered to perform an experiment: amount of sunlight affects the growth of a plant 4. What are the two characteristics of monocot. 5. Classify silver fish. 6. Write any two differences between queen bee and drone bee. 7. DNA testing is reliable technique for criminal investigation. Why? 8. Ghod tapre and gurjo are called medicinal plants. Why? 9. Identify the given animal and write one reason why it is called endangered species? 10. Write two effects of gravity. 11. Two balloons, one filled with air and the other with hydrogen, look identical. What difference can be noticed when they are released into the air? Explain with reasons. 12. Identify the transformer J and K. 13. Write two differences between open and closed universe. 14. A metallic element X forms a compound XY with Y. What might be the valency of X and in which group does it lie? 15. Suppose you are asked to separate metals like copper from their impurities. Some people suggested to use electro-refining. Is it right way? Which method do you think is the right way? 16. How can solid waste like plastics be managed properly? Section 'D': Long Questions [7 x 4 = 28] 17. Netizenship is important skills in the era of technology. What things are to be included to make one 3 minutes awareness video related to it. 18. Which process is shown in the diagram below? Describe the process. 19. Write four preventive measures of high blood pressure. 20. Study the given table and answer the following questions. i. The specific heat capacity of metal ‘A’ is 234J/kg°C. What does it mean? i. What is the direction of heat and why? ii. What will be the equilibrium temperature if stopper is opened, assuming there is no heat gain or loss, in the system?
21. a. The apparent depth of water in a pond appears less than the real depth. Why? b. Light bends away from normal when it passes from the denser medium to the rarer medium. c. Why is the refractive index of glass more than that of water? Give reason. d. Mirage is seen in pitched road or desert during hot summer season. Why? 22. Give reason: a. Write two differences between combination and decomposition reaction. b. Decomposition reaction is also called dissociation reaction. Why? The End!