2.1 Chemistry Plus

354 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES Ex-03.w¯
i Pv‡c 27C ZvcgvÎvq †Kvb M¨v‡mi AvqZb 500 ml n‡j 327C ZvcgvÎvq Zvi AvqZb KZ n‡e? mgvavb: m~Îvbymv‡i, 2 2 1 1 T V T V 1 1 2 2 T V T V 300 500 600 V2 V2 = 1000ml = 1.0 L Ex-04.27C ZvcgvÎvq GKwU M¨v‡mi AvqZb 10 m3 | Pvc w¯
i †i‡L ZvcgvÎv KZ C e„w× Ki‡j AvqZb 12 m3 n‡e? mgvavb: Pvj©‡mi m~Îvbymv‡i, 2 2 1 1 T V T V 1 1 2 2 V T V T 10 300 12 T2 T2 = 360 K cÖ‡qvRbxq ZvcgvÎv, T = (360 300)C = 60C (Ans.) Ex-05. wbw`©ó ZvcgvÎv I 1 atm Pv‡c K‡qKwU gv‡e©jmn M¨‡mi AvqZb 200 mL nq| ZvcgvÎv AcwiewZ©Z †i‡L Pvc‡K wظY Kiv n‡j H gv‡e©jmn M¨v‡mi AvqZb n«vm †c‡q 105 mL nq| H gv‡e©‡ji AvqZb KZ? [BUET. 2013-14] mgvavb: e‡q‡ji m~Î g‡Z, P1V1 = P2V2 1 atm (200 – V) mL = 2 atm (105 – V) mL ev, 200 – V = 210 – 2V ev, V = (210 – 200) = 10 mL gv‡e©‡ji †gvU AvqZb 10 mL ev, 10 cm3 . cÖkœ g‡Z, M¨v‡mi cÖv_wgK AvqZb, V1 = (200 – V) mL cÖv_wgK Pvc, P1 = 1 atm. cwiewZ©Z AvqZb, V2 = (105 – V) mL cwiewZ©Z Pvc, P2 = 2 atm. †M-jymv‡Ki m~‡Îi MvwYwZK cÖ‡qvM I mgvavb: Ex-01.†Kvb wbw`©ó AvqZ‡bi M¨v‡mi ZvcgvÎv 17˚C| AvqZb w¯’i †i‡L M¨vmwU‡K DËß Kivq Zvi Pvc wظY †cj| H M¨vmwUi ZvcgvÎv KZ nj? GENERAL RULES(Written) TRICKS & TIPS[TnT] (MCQ) 1 1 T P = 2 2 T P T2 = 1 2 1 P P T T2 = P 2P290 T2 = 580K = 307˚C ∵ P T ZvB Pvc wظY n‡j ZvcgvÎv wظY n‡e| T2 = 2T1 = 2290K = 580K = 307˚C Ex-02.†Kvb wbw`©ó AvqZ‡bi M¨v‡mi ZvcgvÎv 27°C AvqZb w¯
i †i‡L M¨vmwU‡K DËß Kivq Zvi Pvc Pvi¸Y e„w× †cj| H M¨vmwUi ZvcgvÎv KZ e„w× †cj? GENERAL RULES(Written) TRICKS & TIPS[TnT] (MCQ) 2 2 1 1 T P T P T2 = 4 T1 = 3004 K=1200K ZvcgvÎv e„w×t T= T2-T1=1200-300=900K=900C ∵ P T ZvB Pvc Pvi¸Y n‡j ZvcgvÎv Pvi¸Y n‡e| T= 4T0 = 4300 = 1200K ZvcgvÎv e„w×t T=1200-300=900K=900C Ex-03.GKwU Aw·‡Rb wmwjÛvi 260 evqyPvc mn¨ Ki‡Z cv‡i| wmwjÛviwU 130 evqyPv‡c Ges 27C ZvcgvÎvq Aw·‡Rb Øviv c~Y© Kiv nj| KZ ZvcgvÎvq wmwjÛviwU we‡ùvwiZ n‡e? mgvavb: 2 2 1 1 T P T P 1 2 1 2 P P T T 130 260 300 T2 = 600 K ZvcgvÎv = (600 273)K= 327K = 327C (Ans.) wmwjÛviwU 327C Gi AwaK ZvcgvÎvq we‡ùvwiZ n‡e| e‡qj I Pvj©‡mi mgš^q m~‡Îi MvwYwZK cÖ‡qvM I mgvavb: Ex-01. 30C ZvcgvÎvq I 606 Pa Pv‡c GKwU wbw`©ó f‡ii M¨v‡mi AvqZb 0.1L n‡j 20C ZvcgvÎvq KZ Pv‡c M¨vmwUi AvqZb 2.00 L n‡e? mgvavb: m~Îvbymv‡i, 2 2 2 1 1 1 T P V T P V 1 2 1 1 2 2 T V P V T P P2 = 606 0.1 293 303 2.0 P2 = 293 10 = 29.3 Pa (Ans.) Ex-02. wbw`©ó ZvcgvÎvq I 1 atm Pv‡c a~wjKYv wgwkÖZ Aw·‡Rb M¨v‡mi AvqZb 100 mL| ZvcgvÎv AcwiewZ©Z †i‡L Pvc 75% e„w× Kiv n‡j a~wjKYvmn Aw·‡R‡bi AvqZb n«vm †c‡q 65 mL nq| a~wjKYvi AvqZb KZ? mgvavb: P1V1 T1 = P2V2 T2 ; awi, x = a~wji AvqZb (ml) myZivs 1(100 – x) T1 = 1.75 (65 – x) T1 ; [T2 = T1] (100 – x) = 1.75 (65 – x) x = 18.3333 ml (Ans.) REAL TEST ANALYSIS OF PREVIOUS YEAR QUESTIONS STEP 01 ANALYSIS OF GENERAL UNIVERSITY QUESTION DU 01. cÖgvY ZvcgvÎv I Pv‡c (STP) †Kvb M¨v‡mi 1.0 MÖvg me‡P‡q †ewk AvqZb `Lj K‡i? [DU,Unit-A:2018-19] A. N2 B. H2 C. O2 D. Ar mwVK DËi: B. H2 e¨vL¨v: A¨v‡fv‡M‡Wªvi m~Î g‡Z, V n [P I T w¯
i] myZivs 1g H2 me‡P‡q †ewk AvqZb `Lj Ki‡e| 02. 13°C ZvcgvÎvq wbw`©ó f‡ii GKwU Av`k© M¨v‡mi AvqZb w¯
i Pv‡c wظY Kiv nj| GB Ae¯
vq M¨vmwUi ZvcgvÎv KZ n‡e? [DU.2008-09] A. 7.5°C B. 299°C C. 13°C D. 26°C mwVK DËi: B. 299°C e¨vL¨v: VT, , 2 2 (273 13) VT T T0 = 572K= 299C 03. Pvc w¯
i †i‡L GKwU M¨v‡mi (AvqZb 1000 cm3 ) ZvcgvÎv A‡a©K Kiv nj| cwiewZ©Z Ae¯
vq Dnvi AvqZb KZ n‡e? [DU.2006-07] A. 2000 cm3 B. 500 cm3 C. 1000 cm3 D. 1500 cm3 mwVK DËi: B. 500 cm3

CHEMISTRY PLUS cwi‡ek imvqb 355 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES e¨vL¨v: ‡UKwbKt w¯
i Pv‡c †h †Kvb M¨v‡mi AvqZb Dnvi cig ZvcgvÎvi mgvbycvwZK A_v©r V T, P w¯
i| d‡j ZvcgvÎv A‡a©K n‡j M¨v‡mi AvqZbI A‡a©K n‡e| myZivs 3 1000 500cm 2 V 1 2 V 1 04. †Kvb wbw`©ó AvqZ‡bi M¨v‡mi ZvcgvÎv 0°C AvqZb w¯
i †i‡L M¨vmwU‡K DËß Kivq Zvi Pvc Pvi¸Y e„w× †cj| H M¨vmwUi ZvcgvÎv KZ e„w× †cj? [DU.1999-2000] A. 850 B. 800 C. 810 D. 819 mwVK DËi: D. 819 e¨vL¨v: T P T P 2 2 1 1 P1=P, T1 =273 T2 = 4 T1 = 1092 K; P2= 4P=, T2=? ZvcgvÎv e„w× T2-T1=819C. †UKwbK: T=4T0 K C 4273 1092 819 05. STP †Z GKwU M¨v‡mi AvqZb 150cm3 GKB ZvcgvÎvq D³ M¨v‡mi Pvc A‡a©K Ki‡j AvqZb KZ n‡e? [DU.1995-96] A. 75 cm3 B. 150 cm3 C. 225 cm3 D. 300 cm3 mwVK DËi: D. 300 cm3 e¨vL¨v: ‡UKwbK- V = 2V0 = 2150 = 300 g‡b ivL‡e, w¯
i ZvcgvÎvq Pvc A‡a©K Ki‡j AvqZb wظY n‡e| JnU 01. 1 mol PvD‡j c„w_exi 5000 wgwjqb †jvK‡K •`wbK wZb †ejv K‡i KZ w`b LvIqv‡bv hv‡e? GKRb †jvK‡K cÖwZ‡ejv LvIqv‡Z 10000 msL¨K PvDj jv‡M| [JnU. 2011-12] A. cÖvq 1 w`b B. cÖvq 1 eQi C. cÖvq 1 nvRvi eQi D. cÖvq 1 †KvwU eQi mwVK DËi: D. cÖvq 1 †KvwU eQi e¨vL¨v: 4015333333 11000913 30000 5 10 6.02 10 9 23 eQi| JU 01. GKRb †jvK GK wbtk¦v‡m 200ml evqy MÖnY K‡i| evqyi ZvcgvÎv 27C Ges †m mg‡q evZv‡mi Pvc 750mm (Hg) n‡j †jvKwU GKev‡i KZ¸‡jv M¨vm AYy MÖnY K‡i? [JU. 2010-11] A. 4.831021 B. 6.0231023 C. 12.0231023 D. 8.831021 mwVK DËi: A. 4.831021 e¨vL¨v: X NA = PV RT 21 23 4.83 10 0.0821 300 0.98 0.200 6.023 10 X RU 01. 25˚C ZvcgvÎvq 1 atm Pv‡c 4L O2 M¨vm‡K 0.8L G cwiYZ Ki‡Z Pvc e„w×i cwigvY n‡e- [RU. 2019-20] A. 5 atm B. 4 atm C. 3 atm D. 2 atm mwVK DËi: B. 4 atm e¨vL¨v: P1V1 = P2V2 ; P2 = 1 4 0.8 = 5 ; P = 5 – 1 = 4 02. 1kg Zij cvwbi AvqZb 1L wKš‧ 100°C ZvcgvÎvq 1 evqygÐjxq Pv‡c 1kg Rjxq ev‡®úi AvqZb KZ? [RU-F3.2017-18] A. 1230 L B. 1245 L C. 1250 L D. 1260 L mwVK DËi: B. 1245 L e¨vL¨v: 1kg Zij cvwbi AvqZb cÖvq 1L wKš‧ 100°C ZvcgvÎvq I GK evqygÐjxq (1atm) Pv‡c 1kg Rjxq ev‡®úi AvqZb cÖvq 1245L| [we.`ª : GwU †Kvb MvwYwZK mgm¨v bq| m¤ú~Y© ZË¡xq welq] 03. GKB ZvcgvÎvq GKB AvqZ‡bi cÖ_g cv‡Î 1 mol N2 Ges wØZxq cv‡Î 1 mol CO2 ivLv n‡jv| wb‡gœi †Kvb Dw³wU mwVK bq? [RU-H.2016-17] A. Dfq cv‡Î cigvYyi msL¨v mgvb B. Dfq cv‡Î AYyi msL¨v mgvb C. cÖ_g cv‡Î Pvc wbgœZi D. cÖ_g cv‡Î N2 AYyi MwZ D”PZi mwVK DËi: C. cÖ_g cv‡Î Pvc wbgœZi e¨vL¨v: P n 04. 0.95 atm Pv‡c 25˚C ZvcgvÎvq GKwU M¨v‡mi AvqZb 0.38 L n‡j D³ ZvcgvÎvq 1 atm Pv‡c M¨vmwUi AvqZb KZ n‡e? [RU. 2012-13] A. 0.371 L B. 0.361 L C. 0.375 L D. 0.369 L mwVK DËi: B. 0.361 L e¨vL¨v: P1V1 P2V2 0.950.38 1V2 V2 0.361L 05. 3L †Kvb M¨v‡mi Pvc I ZvcgvÎv h_vµ‡g wθY I wظY e„w× Ki‡j M¨vmwUi bZyb AvqZb n‡e? [RU.2010-11] A. 4 L B. 2 L C. 6 L D. 3 L mwVK DËi: B. 2 L e¨vL¨v: V 2 2T 3P V T P 3 T P V T P V 2 2 2 2 2 1 1 1 06. 170C ZvcgvÎvi 290 mL ‡Kvb M¨vm‡K w¯
i Pv‡c 130C ZvcgvÎvq kxZjxKiY Ki‡j M¨vmwUi cwiewZ©Z AvqZb n‡e? [RU.2010-11] A. 260 mL B. 270 mL C. 286 mL D. 290 mL mwVK DËi: C. 286 mL e¨vL¨v: ‡h‡nZz Pvc w¯
i 1 1 2 2 V T V T 1 1 2 2 V T T V 286ml 290 290 286 07. 20°C ZvcgvÎvq 0.75 Pv‡c 1 mL AvqZ‡bi †Kvb M¨v‡m KZ †gvj M¨vm Av‡Q? [RU.2009-10] A. 1.23 10-5 mol B. 3.12 10-5 mol C. 2.31 10-5 mol D.1.32 10-5 mol mwVK DËi: B. 3.12 10-5 mol e¨vL¨v: n = 0.0821 293 0.75 0.001 RT PV = 3.1210–5 08. w¯
i ZvcgvÎvq I 1 atm Pv‡c †Kvb wbw`©ó f‡ii Aw·‡Rb M¨v‡mi AvqZb 3.15 wjUvi| M¨v‡mi Pvc e„w× K‡i 2.5 atm Kiv n‡j AvqZb KZ n‡e? [RU. 2008-09] A. 1.62 wj. B. 216 wj. C. 621 wj. D. 1.26 wj. mwVK DËi: D. 1.26 wj. e¨vL¨v: P1V1 = P2V2 ev, 5 V2 13.15 2. V2=1.26 L 09. 1 atm Pv‡c Pjbkxj wcóbhy³ GKwU wmwjÛv‡ii wKQz M¨vm 27C ZvcgvÎvq ivLv nj| M¨v‡mi AvqZb wظY Ki‡Z wmwjÛviwUi ZvcgvÎv DbœxZ Ki‡Z n‡e: [RU.2006-07] A. 227C B. 327C C. 350C D.400C mwVK DËi: B. 327C e¨vL¨v: †h‡nZz, Pvc w¯
i Ges AvqZb wظY myZivs- V T V = 2T = 2×(273+27) = 600 K = 327C CU 09. w¯
i Pv‡c 27C ZvcgvÎvq †Kvb M¨v‡mi AvqZb 300 cm3 n‡j 0C ZvcgvÎvq H M¨v‡mi AvqZb KZ n‡e? [CU.10-11; 11-12; CU. 01-02; RU.06-07] A. 273 cm3 B.280 cm3 C. 300 cm3 D. 546 cm3 E. 290 cm3 mwVK DËi: A. 273 cm3 e¨vL¨v: ‡h‡nZz Pvc w¯
i 1 1 2 2 T V T V 1 1 2 2 V T T V 300 600 273 300 273 273 cm3

356 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 10. w¯
i Pv‡c 54 †m ZvcgvÎvq †Kvb wbw`©ó f‡ii M¨v‡mi AvqZb 250 cm3 n‡j GKB Pv‡c 381 ‡m ZvcgvÎvq M¨v‡mi AvqZb KZ n‡e? [CU. 2007-08] A. 150 cm3 B. 300 cm3 C. 350 cm3 D. 400 cm3 E. 500cm3 mwVK DËi: E. 500cm3 e¨vL¨v: 2 2 1 1 T V T V 1 1 2 2 T V T V = 54 273 250 654 = 500 cm3 11. wjUvi AvqZ‡bi cv‡Î GKwU M¨vm 27C I 1 evqygÐjxq Pv‡c Ave× Av‡Q| ZvcgvÎv Avi KZ evov‡j M¨v‡mi AvqZb ‡`o ¸Y e„w× cv‡e? [CU. 2006-07] A. 150C B. 77C C. 250C D. 300C E. 350C mwVK DËi: A. 150C e¨vL¨v: 2 2 1 1 T V T V T2= 1.5300 1 = 450 K = 177C ZvcgvÎv evov‡Z n‡e = 177-27 = 150C 12. w¯
i ZvcgvÎv Ges 2 atm Pv‡c †Kvb M¨v‡mi AvqZb 100cm3 n‡j 4atm Pv‡c H M¨v‡mi AvqZb KZ n‡e? [CU. 2003-04] A. 50 cm3 B. 100cm3 C. 200 cm3- D. 400 cm3 mwVK DËi: A. 50 cm3 e¨vL¨v: P1V1 = P2V2 2×100 = 4V2V2 = 50 13. wbw`©ó AvqZ‡b He M¨vm‡K 0°C ZvcgvÎvi ZZÿY ch©šÍ kxZj Kiv nj hZÿY bv Gi Pvc A‡a©K nq| M¨vmwUi cwiewZ©Z ZvcgvÎv n‡e- [CU. 2002-03] A. -63.5°C B. -136.5°C C. .-163.5°C D. -273.0°C mwVK DËi: B. -136.5°C e¨vL¨v: P T, T0 2 1 PT,T = 1 /2× 273 = 136.5K= (136.5-273)C = -136.5C IU 01. w¯
i Pv‡c wbw`©ó f‡ii nvB‡Wªv‡Rb M¨vm 300 K (A_©vr 27° C) ZvcgvÎvq 906 ml AvqZb `Lj K‡i| †h ZvcgvÎvq H M¨v‡mi AvqZb 500 ml n‡e- [IU:2013-14] A. – 150.44°C B. 107.44°C C. –110.44°C D. –107.44°C mwVK DËi: D. –107.44°C e¨vL¨v: V1 T1 = V2 T2 T2 = V2T1 V1 165.56K 107.44 C 906 500 300 o 02. GKwU M¨v‡mi ZvcgvÎv 17C. ZvcgvÎv evov‡bv n‡jv; d‡j M¨v‡mi Pvc AcwiewZ©Z iBj; wKš‧ AvqZb wظY n‡q †Mj| ZvcgvÎv KZ e„w× †cj? [IU.2009-10] A. 290C B. 250C C. 390C D. 350C mwVK DËi: A. 290C e¨vL¨v: V 2T 2(27317) 580K 307C ZvcgvÎv e„w× = (307-17)C = 290C STEP 02 ANALYSIS OF SCIENCE & TECHNOLOGY QUESTION SUST 01. `yBwU cvÎ A I B h_vµ‡g mgf‡ii CO2 I CH4 w`‡q c~Y© Kiv nj| GKB ZvcgvÎvq cvÎ `ywU‡Z M¨v‡mi Pvc mgvb cvIqv †Mj| cvÎ A Gi AvqZb 24 wjUvi n‡j cvÎ B Gi AvqZb KZ wjUvi? [SUST-B.2016-17] A. 88/3 B. 32 C. 48 D. 66 E. 88 mwVK DËi: D. 66 e¨vL¨v: We have V1 V2 = n1 n2 ; Where V2= CH4 Gi AvqZb = ? V1 = V2 W2 M2 M1 W1 = 24 × 1 44 16 1 = 66 02. GKwU wmwjÛv‡i 2 atm Pv‡c 27C ZvcgvÎvq 5L evZvm ivLv Av‡Q| Lye ax‡i ax‡i evZv‡mi Pvc wظY Kiv n‡j evZv‡mi AvqZb Ges ZvcgvÎv KZ n‡e? [SUST. 2010-11] A. 3.0L, 95C B. 3.5L, 25C C. 1.5L, 28C D. 2.5L, 27C mwVK DËi: D. 2.5L, 27C e¨vL¨v: †h‡nZz m‡gvò cÖwµqv ZvB ZvcgvÎv GKB _vK‡e, P1V1 = P2V2 V2 = P1V1 P2 = 2 5 4 = 5 2 = 2.5L 03. GKB ZvcgvÎv I Pv‡c KZ MÖvg H2S Gi AvqZb 56g N2 Gi M¨vm AvqZ‡bi mgvb n‡e? [SUST:2007-2008] A. 56 B. 68 C. 28 D. 34 mwVK DËi: B. 68 e¨vL¨v: GKB ZvcgvÎv I Pv‡c mgAvqZb wewkó `ywU M¨v‡mi ‡ÿ‡Î, n1 = n2, 2 2 1 1 M m M m 28 56 34 m1 = 68 04. 27C ZvcgvÎvq GKwU M¨v‡mi AvqZb 10 m3 | Pvc w¯
i †i‡L ZvcgvÎv KZ C e„w× Ki‡j AvqZb 12 m3 n‡e? [SUST:2007-2008] A. 5.4 B. 32.4 C. 22.5 D.60°C mwVK DËi: D. 60°C e¨vL¨v: 2 2 1 1 T V T V T2 = 12300 10 = 360 K ZvcgvÎv e„w× = (360–300)K = 60°C 05. ZvcgvÎv w¯
i †i‡L 2.63 atm Pv‡c 1520 mL AvqZb wewkó GKwU M¨vm‡K cÖgvY Pv‡c Avbv n‡j Zvi AvqZb n‡e- [SUST:2006-2007] A. 3997.6mL B. 2996.7mL C. 9337.6ml D. 4997.6mL mwVK DËi: A. 3997.6ml e¨vL¨v: P1V1= P2V2 2.631520=1 V2 V2 = 3997.6mL JUST 01. w¯
i Pv‡c I (5°C) ZvcgvÎvq 1500 ml †PZbvbvkK M¨vm †Kvb †ivMxi kix‡i cÖ‡ek Kiv‡bv n‡jv| †ivMxi †`‡ni ZvcgvÎv 37°C n‡j cÖweó M¨v‡mi AvqZb KZ ml n‡e? [JUST-B.2017-18] A. 1692.83 B. 1672.66 C. 1572.66 D. 1592.83 mwVK DËi: B. 1672.66 e¨vL¨v: ml T V T V T V T V 1672.66 278 1500 310 1 1 2 2 2 2 1 1 02. w¯
i ZvcgvÎvq 100 †mwg Pv‡c †Kvb M¨v‡mi AvqZb 5 wjUvi n‡j 50 †mwg Pv‡c H M¨v‡mi AvqZb KZ? [JUST. 2015-16] A. 5 wjUvi B. 10 wjUvi C. 7.5 wjUvi D. 12.5 wjUvi mwVK DËi: B. 10 wjUvi e¨vL¨v: P1V1 = P2V2 V2 = 1005 50 = 10L PUST 01. 273 K ZvcgvÎvq †Kv‡bv M¨v‡mi AvqZb 100.0 L| w¯
i Pv‡c AvqZb Kwg‡q hw` 50.0 L Kiv nq Zvn‡j M¨v‡mi bZzb ZvcgvÎv KZ n‡e? [PUST. 2019-20] A. 119 K B. 137 K C. 153 K D. 169 K mwVK DËi: B. 137 K e¨vL¨v: V1 T1 = V2 T2 T2 = T1V2 V1 = 273 50 100 = 136.5 K MBSTU 01. w¯
i Zv‡c †Kv‡bv M¨v‡mi Pvc wظY evov‡j AvqZb n‡e-[MBSTU-A1.2017-18] A. wظY B. A‡a©K C. Pvi ¸Y D. GK PZz_©vsk mwVK DËi: B. A‡a©K e¨vL¨v: 2 1 1 1 1 2 2 2 P V P V P V P V 1 1 1 2 1 2 2 V V P V P

CHEMISTRY PLUS cwi‡ek imvqb 357 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES NSTU 01. w¯
i ZvcgvÎvq I 1 atm Pv‡c †Kvb wbw`©ó f‡ii Aw·‡Rb M¨v‡mi AvqZb 4.15 L nq| H Aw·‡Rb M¨v‡mi Pvc e„w× K‡i 3 atm Kiv nj| ZLb H M¨v‡mi AvqZb KZ n‡e? [NSTU-A. 2019-20] A. 1.26 L B. 2.26 L C. 1.5 L D. 3.15 L mwVK DËi: C. 1.5 L e¨vL¨v: P1V1 = P2V2 V2 = P1V1 P2 = 1 4.15 3 = 1.38 = 1.5 L (cÖvq) STEP 03 ANALYSIS OF ENGINEERING & BUTex QUESTION BUET 01. GKwU ‡j․nwmwjÛv‡i 250 kPa Pv‡c Ges 300K ZvcgvÎvi wnwjqvg M¨vm fwZ© Av‡Q wmwjÛviwU 1 103 kPa Pvc mn¨ Ki‡Z cv‡i Ges Mjbv¼ 1800K| wmwjÛviwUi Mjbv¼ ZvcgvÎvq M¨v‡mi Pvc KZ n‡e? wmwjÛviwU Kx M‡j hv‡e bvwK we‡ùvwiZ n‡e? [BUET. 2018-19] e¨vL¨v: Avgiv Rvwb P1 T1 = P2 T2 250 103 300 = P2 1800 P2=1.5106 = 1.5103 kPa †h‡nZz Mjbv‡¼ Pv‡ci gvb mnbkxj gvb A‡cÿv †ewk ZvB wmwjÛviwU we‡ùvwiZ n‡e| GLv‡b P1 = 250103 Pa T1 = 300 K T2 = 1800 K P2 =? 02. wekªvgKv‡j GK e¨w³ 250C ZvcgvÎv I 100 kPa Pv‡c GK N›Uvq 14 L Aw·‡Rb MÖnY K‡i| e¨w³wU KZ †gvj Aw·‡Rb MÖnY K‡i? [BUET: 08-09] A. 0.57 mol B. 0.44 mol C. 1.6 mol D. 0.322mol mwVK DËi: A. 0.57 mol e¨vL¨v: 2 2 2 1 1 1 T PV T PV 2 1 1 1 2 2 PV PV T V 101.325 298 100 14 273 12.65779L myZivs †gvj msL¨v = 22.4 12.65779 = 0.57 mol KUET 01. 80 cm 3 M¨v‡mi AvqZb 20% ewa©Z Kiv n‡jv wKš‧ Pv‡ci †Kvb cwieZ©b n‡jv bv| cÖviw¤¢K ZvcgvÎv 250C n‡j M¨vmwU KZ ZvcgvÎvq DËß Kiv n‡qwQj? [KUET. 2015-16] A. 357.60C B. 3000C C. 84.60C D. 60.00C E.76.40C mwVK DËi: C. 84.60C e¨vL¨v: T2 = V2T1 V1 = (80+80 20 100 )298 80 =357.6K = 84.60C 02. KZ wWMÖx ZvcgvÎvq 100kPa Pv‡c 2.24dm3 GKwU cv‡Î 14.0gmN2 M¨v‡mi ms‡KvPbkxjZv ¸Yv¼ 0.10 n‡e? [KUET. 2014-15] A. – 3.64ºC B.265.72 ºC C. 269.36 ºC D. 538.7 ºC E. -273K mwVK DËi: B.265.72 ºC e¨vL¨v: Z = RT PV 0.1 = 0.5 0.0821 T 2.24 101.325 100 T = 538.72K = (538.72 273)C = 265.72ºC STEP 04 ANALYSIS OF MEDICAL & HSC QUESTION MAT 01. 27C ZvcgvÎvq 300 ml cwigvY GKwU M¨vm‡K GKB Pv‡c †i‡L 7C ZvcgvÎvq wb‡q Avmv n‡j Bnvi AvqZb n‡e [MAT. 2015-16] A. 280 ml B. 540 ml C. 350 ml D. 135 ml mwVK DËi: A. 280 ml e¨vL¨v: 2 2 1 1 T V T V ml V 280 300 280 300 2 02. 20C ZvcgvÎvq 80 kPa Pv‡c GKwU wbw`©ó cwigvY M¨v‡mi AvqZb 0.25 m 3 | 20C ZvcgvÎvq D³ M¨v‡mi AvqZb 0.50 m3 n‡j M¨vmwUi Pvc KZ n‡e? [MAT:13-14] A. 20 kPa B. 40 kPa C. 50 kPa D. 60 kPa mwVK DËi: B. 40 kPa e¨vL¨v: M¨v‡mi mgš^q m~Î †_‡K cvB: P1V1 T1 = P2V2 T2 P2 = P1V1T2 V2T1 = 0.25 80 293 0.50 293 = 40 P1 = 80 kPa V1 = 0.25 m3 T1 = 20C = (273 + 20) = 293 K V2 = 0.50 m3 T2 = 20C = (273 + 20) = 293 K P2 =? 03. w¯
i ZvcgvÎvq I 1 atm Pv‡c †Kvb wbw`©ó f‡ii Aw·‡Rb M¨v‡mi AvqZb 3.15 L nq| H Aw·‡Rb M¨v‡mi Pvc e„w× K‡i 2.50 atm Kiv n‡j, ZLb H M¨v‡mi AvqZb KZ? [MAT: 2005-2006] A. 2.16 B. 1.26 C. 1.62 D. 6.21 mwVK DËi: B. 1.26 e¨vL¨v: P1V1 P2V2 50 V2 13.15 2. V2 1.26 04. GKwU d¬v‡· 10 atm Pv‡c 50 L nvB‡Wªv‡Rb fwZ© Kiv Av‡Q| 2 L AvqZb wewkó KZwU †ejyb‡K H M¨vm Øviv fwZ© Kiv hv‡e; hLb cÖwZwU †ejyb Gi wfZi nvB‡Wªv‡Rb M¨v‡mi Pvc 2 atm n‡e| [cÖwZ †ÿ‡Î M¨v‡mi ZvcgvÎv w¯
i Av‡Q]? [MAT: 2001-2002] A. 105 wU ‡ejyb B. 90 wU †ejyb C. 120 wU †ejyb D. 125 wU †ejyb mwVK DËi: D. 125wU †ejyb e¨vL¨v: awi , †ejy‡bi msL¨v = x wU, 1wU †ejy‡bi AvqZb = 2L x msL¨K †ejy‡bi AvqZb = 2xL m~Îvbymv‡i, P1V1 P2V2 10 50 = 2 2x 2 2 10 50 x x = 125 ‡ejy‡bi msL¨v = 125 wU M¨vm m¤úwK©Z MvwYwZK cÖ‡qvM: Item-02 : M¨vm mgxKiY `yB cÖKvit 01.Av`k© M¨vm mgxKiY 02.ev¯Íe M¨vm ev f¨vb&Wvi Iqvjm mgxKiY Sub Item-01 : Av`k© M¨vm mgxKiY m~‡Îi bvg MvwYwZK mgxKiY mvs‡KwZK wPý Av`k© M¨vm mgxKiY PV = nRT PV = w M RT m V (d)= PM RT w = cÖ`Ë fi M = AvYweK fi d = NbZ¡ GLv‡b, V1 = 300 T1 = (27+273)K T2 = (7+273)K V2 =? V2 wbY©q Ki‡Z n‡e|

358 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES Ex-01. 27°C ZvcgvÎvq 0.82 atm Pv‡c 14 g bvB‡Uªv‡R‡bi AvqZb KZ? mgvavb: V = mRT MP = 14× 0.0821 × 300 28 × 0.82 = 15 L Ex-02. 27°C ZvcgvÎvq Ges 1.64 atm Pv‡c GKwU bgybv M¨v‡m 500ml AvqZb| bgybv M¨v‡mi fi 2.0g M¨vmwUi AvYweK fi †ei Ki? mgvavb: M = mRT PV = 2.0 × 0.0821 × (273 + 27) 1.64 × 0.5 M = 300 5 10 = 60g Ex-03. 27°C ZvcgvÎvq 22g CO2 M¨vm 0.82L AvqZb `ªeY n‡j H M¨v‡mi Pvc KZ? mgvavb: P = mRT MV = 22 ×0.0821 × (27 + 273) 44 × 0.82 = 22 300 44 10 =15 atm Ex-04. 100°C ZvcgvÎvq Ges 1.0526 atm. Pv‡c CO2 M¨v‡mi NbZ¡ KZ n‡e? mgvavb: PV = mRT M ev, m V = PM RT d= 1.0526 ×44 373 × 0.0821 = 1.512 gL-1 Ex-05. 0°C ZvcgvÎvq 100kPa Pv‡c bvB‡Uªv‡R‡bi NbZ¡ 1.4gL-1 n‡j H ZvcgvÎvq Zvi Pvc wظY Ki‡j Nb‡Z¡i gvb KZ n‡e? mgvavb: GENERAL RULES(Written) TRICKS & TIPS[TnT] (MCQ) 2 2 1 1 d P d P [ Here, P1 = 100kPa, P2 = 2 100kPa d1 = 1.4 gL-1 , d2 =? ] ev, 100 2 1.4 100 1 1 2 2 P d P d = 2.8 gL-1 (Ans.) ‡h‡nZz d P ZvB Pvc wظY n‡j NbZ¡ wظY n‡e| d2 = 2d1 = 2 1.4 = 2.8 gL–1 Ans. Ex-06.0˚C ZvcgvÎvq Ges 1.0 atm Pv‡c N2 M¨v‡mi NbZ¡ 14.0 gL–1 | GKB ZvcgvÎvq Pvc wZb¸Y Ki‡j M¨vmwUi NbZ¡ KZ n‡e? GENERAL RULES(Written) TRICKS & TIPS[TnT] (MCQ) mgš^q m~Î: 1 1 1 P d T = 2 2 2 P d T w¯’i ZvcgvÎvq 1 2 1 P P d d2 = 1.0 3.014.0 = 42.0 g/L ∵d P ZvB Pvc wZb¸Y n‡j NbZ¡ wZb¸Y n‡e| d2 = 3d1 = 3 14 = 42 gL–1 Ans. Ex-07. M¨v‡mi NbZ¡ m¤úwK©Z MYbvt 167°C ZvcgvÎvq Ges 0.82 atm Pv‡c CO2 M¨v‡mi NbZ¡ KZ n‡e? mgvavb: From the law, d = PM RT = 0.82 44 0.0821 (167 + 273) = 10 44 440 = 1 gL1 Here, P = 0.82 atm, M=44g mol-1 , R = 0.0821, T = (273+167) K = 440 K Ex-08. 213C ZvcgvÎvq 1 atm Pv‡c 9.8 L AvqZ‡bi 2 mol M¨vm Av‡Q| M¨vmwU Av`k© bvwK ev¯Íe? mgvavb: We know, PV = ZnRT Z = PV nRT = 1 9.8 2 0.0821 0.60 = 120 2 60 = 1 M¨vmwU Av`k© n‡e, †h‡nZz Z = 1 Here, P = 1 atm; V = 9.8 L; T = 213C = 60 k; R = 0.0821 L atm mol1 k 1 ; n = 2 Ex-09. g‡b Ki, m~‡h©i †K‡›`ª †h M¨vm¸‡jv Av‡Q Zv‡`i Mo AvYweK fi, NbZ¡ Ges Pvc h_vµ‡g 5.6, 1.05 kg/m3 Ges 1.1 1010 N/m2 | m~‡h©i †K‡›`ªi ZvcgvÎv MYbv Ki| [BUET. 2001-02] mgvavb: PV = nRT P = m v RT M = dRT M T = PM dR PM = dRT 1.1 1010 5.6 103 1.05 8.316 = 7.05 106 K GLv‡b AvYweK fi, M = 5.6 103 kg mol1 ,NbZ¡, d = 1.05 kg/m3 Ges Pvc, P = 1.1 1010 N/m2 Ex-10. 8.2atm Pvc Ges 27C ZvcgvÎvq 6.0 L bvB‡Uªv‡Rb M¨v‡mi fi KZ? [RU. 2019-20] mgvavb: We know, PV = nRT PV = wRT M W = PVM RT = 8.2 6 28 0.082 300 , W = 56 gm N2 M¨v‡mi fi 56 gm Sub Item-02 : ev¯Íe M¨vm mgxKiY Ex-01.35.5gm ‡K¬vwib M¨v‡mi Rb¨ f¨vbWvi Iqvjm mgxKiY †jL? [KUET. 2014-15] mgvavb: [35.5gm Cl2 Gi Rb¨ n = ] V nb nRT V n a P 2 2 RT 2 b V 4V a P 2 Ex-02. V 0.2b 0.2RT V 0.04a P 2 mgxKiYwU KZ MÖvg bvB‡Uªv‡Rb M¨v‡mi Rb¨ cÖ‡hvR¨? mgvavb: mgxKi‡b, n = 0.2 n = w M w = 0.2 28 = 5.6

CHEMISTRY PLUS cwi‡ek imvqb 359 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES REAL TEST ANALYSIS OF PREVIOUS YEAR QUESTIONS STEP 01 ANALYSIS OF GENERAL UNIVERSITY QUESTION DU 01. 100C ZvcgvÎvq I 1 evqygÐjxq Pv‡c 1 wK‡jvMÖvg Rjxq ev‡¯úi AvqZb KZ? [DU.2013-2014] A. 12 L B. 100 L C. 1200 L D. 1701 L mwVK DËi: D. 1701 L e¨vL¨v: M P mRT RT V M m PV 1701L 18 1 1000 0.0821 373 02. 20C ZvcgvÎv I 50103 Nm2 Pv‡c H2 M¨v‡mi NbZ¡ KZ g/cc? [JU. 2013-14] A. 8.15102 B. 4.15102 C. 8.15103 D. 4.15103 mwVK DËi: B. 4.15102 e¨vL¨v: d = PM RT = 0.492 0.0821293 =4.1210–2 g/cc [∵P = 50 103 101325] 03. 17C ZvcgvÎvq 2atm Pv‡c 5litre AvqZ‡bi GKwU M¨v‡mi IRb 3g| M¨vmwUi AvYweK IRb KZ? [DU.2007-2008] A. 7.14 B. 26.13 C. 32.14 D. 16.34 mwVK DËi: A. 7.14 e¨vL¨v: Avgiv Rvwb, PV = RT M m M = 2 5 3 .0821 290 PV mRT = 7.1427 04. 10.00 Kg wnwjqvg Øviv 288 K ZvcgvÎvq GKwU †ejyb‡K dzwj‡q †ejy‡bi g‡a¨ M¨v‡mi Pvc 1.50atm Kiv nj | †ejybwUi AvqZb KZ?[DU.2005-06] A. 78720 L B. 39360 L C. 2050 L D. 39.36 L mwVK DËi: B. 39360 L e¨vL¨v: PV = nRT = M m RT V = wRT PM = 10 103 0.0821 288 4 1.5 = 39360 L 05. 27C ZvcgvÎvq 1.0atm Pv‡c 8.2 L AvqZ‡bi †Kvb M¨v‡mi fi 6.0g, M¨vmwUi Av‡cwÿK fi KZ? [DU.1995-1996] A. 44 B. 18 C. 28 D. 16 mwVK DËi: B. 18 e¨vL¨v: RT M m PV 18.02 1 8.2 6 0.0821 (27 273) PV mRT M JU 01. cÖgvY ZvcgvÎv I Pv‡c 1.0 mol GKwU M¨v‡mi ms‡KvPbkxjZv ¸YvsK 5.8102 | 10C ZvcgvÎv Ges 100 kPa Pv‡c M¨vmwUi AvqZb KZ? [JU. 2013-14] A. 1.37 dm3 B. 1.44 dm3 C. 1.56 dm3 D. 1.60 dm3 mwVK DËi: A. 1.37 dm3 e¨vL¨v: Avgiv Rvwb, PV = ZnRT; Z = PV nRT 5.8 10–2 = 100 V 1 0.0821 283 101.325 V = 5.8 10–2 0.0821 283 101.325 100 = 1.37 dm3 02. 25°C ZvcgvÎvq 650 mm Pv‡c 15.0 gm O2 M¨v‡mi AvqZb MYbv Ki - [JU.2010-2011] A. 17.42 dm3 B. 21.23 dm3 C. 19.41 dm3 D. 13.41 dm3 mwVK DËi: D. 13.41 dm3 e¨vL¨v: PV = nRT V = 13.41 32 0.855 15 0.0821 273 25 MP mRT 03. 300 ‡m. ZvcgvÎv I 0.987 atm Pv‡c 1 †gvj Av`k© M¨v‡mi AvqZb KZ? [JU.2009-2010] A. 50.4L B. 2.52L C. 25.2L D. 5.04L mwVK DËi: C. 25.2L e¨vL¨v: PV = nRT V = 0.987 1 0.0821 273 30 P nRT = 25.20L RU 01. 27˚C ZvcgvÎvq 102 kPa Pv‡c 250 mL wg‡_b M¨v‡mi fi wbY©q Ki| [RU. 2012-2013] A. 0.1635 g B. 0.1700g C. 0.1699g D. 0.1654g mwVK DËi: A. 0.1635 g e¨vL¨v: RT M m PV ev, m = 102 2.5 10–3 16 101.325 0.0821 300 = 0.1635g 02. 20˚C DòZvq 740 mm Pv‡c 400 mL AvqZ‡bi †Kvb M¨v‡mi fi 0.842g| M¨vmwUi AvYweK fi KZ? [RU. 2012-2013] A. 52 B. 52.88 C. 53 D. 52.65 mwVK DËi: A. 52 e¨vL¨v: RT M m PV M = mRT PV =` 0.842 0.0821 293 0.973 0.4 M 52.00 03. 27C ZvcgvÎvq 0.526atm Pv‡c 15gm bvB‡Uªv‡R‡bi AvqZb KZ? [RU. 2010-11; IU.2008-09] A. 18L B. 14L C. 22.4L D. 25L mwVK DËi: D. 25L e¨vL¨v: V = wRT PM 25L 28 0.526 15 0.0821 300 04. 27C ZvcgvÎvq 0.526 atm Pv‡c 15g bvB‡Uªv‡R‡bi AvqZb KZ? [RU.08-09] A. 20L B. 25.05L C. 30L D. 10L mwVK DËi: B. 25.05L e¨vL¨v: RT M m PV 25.08 L 28 0.526 15 0.0821 300 V 05. 25C ZvcgvÎvq 5 evqygÐjxq Pv‡c GKwU 100 wjUvi wmwjÛv‡i KZ †gvj nvB‡Wªv‡Rb Av‡Q? [RU.2008-09] A. 20.45 B. 22.45 C. 23.45 D.24.45 mwVK DËi: A. 20.45 e¨vL¨v: 20.45 298 0.0821 5 100 RT PV n 06. PV = 0.02 RT mgxKiYwU KZ MÖvg Av`k© M¨vm, A (M=28 g mol-1 ) Gi mgxKiY- [RU.2008-2009] A. 5.6 g B. 0.56 g C. 6.5 g D. 0.65 g mwVK DËi: B. 0.56 g e¨vL¨v: M m n ev, m = 0.0228 m 0.56g 07. GKwU Zij •Re †h․‡Mi 0.250 MÖvg 87C ZvcgvÎvq 88000 Pa Pv‡c 55.1 ml AvqZb c~Y© K‡i| •Re †h․MwUi AvYweK fi: [RU.2006-2007] A. 154 g mol-1 B. 256 g mol-1 C. 300 g mol-1 D. 325 g mol-1 mwVK DËi: A. 154 g mol-1

360 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES e¨vL¨v: RT M m PV M = wRT PV = 0.250 0.0821 360 101.325 88 55.1 10–3 = 154.4 CU 01. NTP ‡Z 5.6 wjUvi M¨v‡mi IRb 7.5g n‡j M¨vmwUi AvYweK ms‡KZ nj- [CU. 2008-2009] A. NH3 B. CO C. O2 D. H2O E. NO mwVK DËi: E. NO e¨vL¨v: RT M m PV 30 1 5.6 7.5 0.0821 273 PV mRT M hv NO Gi AvYweK fi wb‡`©k K‡i| IU 01. 27C ZvcgvÎvq 0.526 atm Pv‡c 15g N2 Gi AvqZb KZ? [IU. 2008-09] A.5.0L B. 25.08L C. 21.08 L D. 15.08L mwVK DËi: B. 25.08L e¨vL¨v: RT M m PV V = wRT PM V = 15 0.0821 300 0.526 28 = 25.08 L STEP 02 ANALYSIS OF SCIENCE & TECHNOLOGY QUESTION SUST 01. GKwU cv‡Î 27C ZvcgvÎvq 1.0 atm Pv‡c wKQy CO2 M¨vm Av‡Q| M¨vmwUi NbZ¡ KZ g.L–1 ? [SUST-A. 2019-20] A. 1.786 B. 19.85 C. 0.0176 D. 0.287 E. 0.893 mwVK DËi: A. 1.786 e¨vL¨v: d = PM RT = 1.0 44 0.0821 300 = 1.786 02. 64 g Aw·‡Rb GKwU Ave× cv‡Î 600 K ZvcgvÎvq 2atm Pvc •Zwi K‡i| H cv‡Î 56 g N2 M¨vm KZ ZvcgvÎvq ivL‡j GKB Pvc •Zwi Ki‡e? [SUST. 2012-2013] A. 300 K B. 200 K C. 600 K D. 800 K E. 1000 K mwVK DËi: C. 600 K e¨vL¨v: Av`k© M¨vm mgxKiY Abymv‡i Pvc, R I AvqZb mgvb nIqvq 2 2 2 1 1 1 M T m T M m T T 600K 28 56 600 32 64 2 2 JUST 01. GK e¨w³ 27C ZvcgvÎvq I 100 KPa Pv‡c GK NÈvq 15 wjUvi Aw·‡Rb MÖnY Ki‡j, e¨w³wU KZ †gvj Aw·‡Rb MÖnY K‡i? [JUST-A,Set-Kha 2018-19] A. 0.50 mol B. 0.57 mol C. 0.44 mol D. 0.60 mol mwVK DËi: D. 0.60 mol e¨vL¨v: 0.60 101.325 0.082 300 100 15 RT PV n mol NSTU 01. 30C ZvcgvÎv I 740 mm (Hg) Pv‡c 0.96 g GKwU M¨vm 300 mL AvqZb `Lj K‡i| M¨vmwUi AvYweK fi KZ? [NSTU-A. 2019-20] A. 50.84 B. 59.84 C. 41.66 D. 81.66 mwVK DËi: D. 81.66 e¨vL¨v: M = WRT PV = 0.96 0.082 303 0.9736 0.3 = 81.66 STEP 03 ANALYSIS OF ENGINEERING & BUTex QUESTION BUET 01. GKRb †jvK GK wbtk¦v‡m 0.2L evqy MÖnY K‡i hvi ZvcgvÎv 27 C o Ges Pvc 1.0atm | †jvKwU GKev‡i KZ¸‡jv M¨vm AYy MÖnY K‡i| [BUET.2013-2014] A. 48.91021 B. 4.891021 C. 4.981021 D. None of these mwVK DËi: B. 4.891021 e¨vL¨v: 0.082 300 1 0.2 RT PV PV nRT n = 0.00813 N = n NA = 0.00813 6.023 1023 = 4.89 1021 ¸‡jv| 02. 2770C ZvcgvÎvq I 1.0 atm evqy Pv‡c 1.0 L †ejy‡b wnwjqvg Gi †gvj msL¨v wbY©q Ki| [BUET: 2006-07] A. 0.05 B. 0.04 C. 0.06 D. 0.022 mwVK DËi: D. 0.022 e¨vL¨v: 0.022 0.0821 550 1 1 RT PV PV nRT n KUET 01. 0C ZvcgvÎv I 1.0atm Pv‡c CO2 M¨v‡mi NbZ¡ (g/L GK‡K) KZ n‡e? [KUET-2016-17] A. 0.019 B. 0.0196 C. 1.963 D. 0.081 E. 0.811 mwVK DËi: C. 1.963 e¨vL¨v: d = PM RT = 144 0.0821273 = 1.963g/L 02. KZ wWMÖx ZvcgvÎvq 100 kPa Pv‡c 2.24 dm3 GKwU cv‡Î 14.0 gmN2 M¨v‡mi ms‡KvPbkxjZv ¸Yv¼ 0.10 n‡e? [KUET 2014-15] A. 3.64C B. 265.72C C. 369.36 D. 538.7C E. 273 K mwVK DËi: B. 265.72C e¨vL¨v: Z = PV nRT 0.1 = 100 101.325 2.24 0.5 0.0821 T T = 53872 K = 265.72C 28 gm 1 mol 14 gm 14 28 mol n = 0.5 mol 03. 35.5gm ‡K¬vwib M¨v‡mi Rb¨ f¨vbWvi Iqvjm mgxKiY †KvbwU? [KUET. 2014-15] A. RT 2 b V 2V a P 2 B. 2V b RT 2V a 2P 2 C. 2V b RT V a P 2 D. RT 2 1 2 b V 4V a P 2 E. 2RT 2 b V 2V a P 2 mwVK DËi: D e¨vL¨v: RT 2 1 2 b V 4V a P 2 [35.5gm Cl2 Gi Rb¨ n = 35.5 71 = 0.5] CUET 01. 20ºC ZvcgvÎvq 98.66 kPa Pv‡c 0.842 kg GKwU M¨vm 0.4m3 AvqZb `Lj K‡i| M¨vmwUi AvYweK fi KZ n‡e? [CUET. 2014-15] A. 5.1 kg B. 51.97 kg C. 61.97 kg D. None of them mwVK DËi: B. 51.97 kg e¨vL¨v: PV = nRT; M = wRT PV = 842 0.0821 293 101.325 98.66 0.4 103 = 51.97 kg

CHEMISTRY PLUS cwi‡ek imvqb 361 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 02. 273 K Zv‡c I 760 mm Pv‡c 2240 mlCO2 M¨v‡mi fi nBjÑ [BUTex: 2012-13] A. 44 MÖvg B. 4.4 MÖvg C. 88 MÖvg D. 8.8 MÖvg mwVK DËi: B. 4.4 MÖvg e¨vL¨v: RT M m PV 4.4 0.0821 273 1 2.24 44 RT PVM m STEP 04 ANALYSIS OF MEDICAL & HSC QUESTION MAT 01. 0.44gm cwigvY M¨v‡m KZ †gvj CO2 _v‡K- [MAT: 2012-2013] A. 0.1 mol B. 0.001 mol C. 0.0001 mol D. 0.01mol mwVK DËi: D. 0.01mol e¨vL¨v: 0.01 44 0.44 M m n Pvc m¤úwK©Z MvwYwZK cÖ‡qvM: Item-03 : `yB cÖKvi cÖkœ Av‡m t 01. AvswkK Pvc wbY©q 02. ‡gvU Pvc wbY©q Sub Item-01 : AvswkK Pvc wbY©q fi D‡jøL _vK‡j-‡UKwbKt G ai‡bi mgm¨vi ïay gvÎ †gvj msL¨v ‡ei Ki‡jB Pj‡e| cy‡iv As‡Ki wnmve `iKvi †bB| GKB ZvcgvÎvq M¨v‡mi Pvc Zvi ‡gvj msL¨vi Dci wbf©ikxj| A_v©r P n Kv‡RB hvi †gvj msL¨v †ewk Zvi Pvc ev AvswkK Pvc †ewk| Gevi D`vnib jÿ¨ KiEx-01. 1 atm Pv‡c I wbw`©ó ZvcgvÎvq GKwU wbw`©ó AvqZ‡bi cv‡Î 4gHe, 14gN2 Ges 16gO2 Av‡Q| †KvbwUi AvswkK Pvc m‡ev©”P? mgvavbt n = M m By the Law, He= 1.0 4 4 , N2= 0.5 28 14 , O2= 0.5 32 16 hvi †gvj msL¨v ‡ewk Zvi AvswkK Pvc m‡ev©”P| Kv‡RB wnwjqv‡gi †gvj msL¨v m‡e©v”P| ZvB Gi AvswkK PvcI m‡e©v”P| Ex-02. 28g N2, 4gH2, 17gNH3 I 4gHe Gi †Kvb e¯‧i Rb¨ GKB AvqZ‡bi cv‡Î GKB ZvcgvÎvq Pvc m‡ev©”P n‡e? mgvavbt n = M m m~Î cÖ‡qvM K‡i cvB-nN2 = 1. 28 28 nH2 = 2, 2 4 nNH3 = 1, 17 17 nHe= 1 4 4 4gH2 Gi Pvc †ewk n‡e| KviY †gvj msL¨vi gvb m‡ev©”P| AvqZb D‡jøL _vK‡jt AvswkK Pvc = wbR¯^ AvqZb ‡gvU AvqZb ‡gvU Pvc Ex-01. wZb AvqZb bvB‡Uªv‡Rb I `yB AvqZb †K¬vwib wgkª‡bi c~Y© Pvc 1 atm (760 mm), H wgkª‡Y N2 I Cl2 Gi AvswkK Pvc KZ? mgvavbt N2 P = 760 456 3 2 3 mm, Cl2 P = 760 304 3 2 2 mm C. AvswkK Pv‡c †gvj fMœvsk D‡jøL _vK‡j - AvswkK Pvc = †gvj fMœvsk †gvU Pvc Ex-01. `ywU M¨vmxq Dcv`vb wewkó wm‡÷‡gi †gvU Pvc 0.6atm| GKwU Dcv`v‡bi †gvj fMœvsk 0.3 n‡j Zvi AvswkK Pvc KZ? mgvavbt AvswkK Pvc=‡gvjfMœvsk׆gvU Pvc = 0.6×0.3 = 0.18 Ex-02. ci¯úi wewµqvnxb †Kvb M¨vm wgkÖ‡Y 142 g †K¬vwib M¨vm I 8 g nvB‡Wªv‡Rb M¨vm i‡q‡Q| wgkÖ‡Yi †gvU Pvc 1.5 atm n‡j †K¬vwib I nvB‡Wªv‡R‡bi AvswkK Pvc wbY©q Ki| [BUTex. 2009-10] mgvavbt P = 1.5 atm WCl2 = 142 g nCl2 = 142 71 = 2 nCl2 = 142 71 = 2 mH2 = 8 g nH2 = 8 2 = 4 PCl2 = nCl2 nCl2 + nH2 P = 2 2 + 4 1.5 atm = 0.5 atm (Ans.) PH2 = (1.5 0.5) atm = 1 atm (Ans.) Sub Item-02 : AvswkK Pvc †_‡K †gvU Pvc wbY©q Wvë‡bi AvswkK Pvc m~Î mvs‡KwZK wPý P = P1 + P2 + P3 + .......................... Pn PV =P(V1 + V2) = P1 V1 + P2V2 ; P = XA P 0 (AvswkK Pvc = †gvU Pvc †gvj fMœvsk) hLb GKvwaK cv‡Î GKvwaK M¨vm wgwkªZ _v‡K ZLb †gvU Pvc wbY©‡qi m~Î: PT(V1+V2+.......+Vn) = P1V1+P2V2+....... +PnVn Ex-01. 450 mL AvqZb wewkó cvÎ 0.50atm Pv‡c N2 Ges Av‡iKwU cvÎ 300ml, 0.50atm Pv‡c O2 Øviv c~Y© Av‡Q| M¨vm `ywU wgwkªZ n‡Z w`‡j wgwkªZ M¨v‡mi Pvc KZ n‡e? mgvavb: PT (V1+V2) = P1V1+P2V2 PT = P1V1 + P2V2 V1 + V2 = 450 0.50 + 300 0.5 450 + 300 = 375 750 = 0.50 (Ans.) hLb GKwU cv‡Î GKvwaK M¨vm wgwkªZ _v‡K ZLb: PT VT= P1V1+P2V2+.............+PnVn Ex-02. GKwU wbw`©ó ZvcgvÎvq 1.5L cv‡Î 0.60 atm Pv‡c 90ml O2, 0.80 atm Pv‡c 75ml N2 Ges 0.90 atm Pv‡c 40 ml H2 wgwkªZ Kiv nj| wgkª‡Yi †gvU Pvc KZ? mgvavb: PT= P1V1 + P2V2+ P3V3 V = 0.60 90 + 0.80 75 + 0.90 40 1.5 1000 = 150 1500 = 0.1 atm

362 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES REAL TEST ANALYSIS OF PREVIOUS YEAR QUESTIONS STEP 01 ANALYSIS OF GENERAL UNIVERSITY QUESTION DU 01. wb‡Pi †Kvb e¯‧i Rb¨ GKB AvqZ‡bi cv‡Î GKB ZvcgvÎvq Pvc m‡ev©”P n‡e? [DU. 2005-06] A. 28gN2 B. 4gH2 C. 17gNH3 D. 4gHe mwVK DËi: B. 4gH2 e¨vL¨v: P= V nRT [ R, T,V Constant ZvB hvi †gvj msL¨v †ewk †mwUi Pvc m‡ev©”P n‡e] nN2= 1. 28 28 nH2 = 2, 2 4 nNH3 = 1, 17 17 nHe = 1 4 4 4gH2 Gi Pvc †ewk n‡e| KviY †gvj msL¨vi gvb m‡ev©”P| †UKwbK: hvi †gvj msL¨v †ewk †mwUi Pvc m‡ev©”P n‡e| 02. 1 atm Pv‡c I wbw`©ó ZvcgvÎvq GKwU wbw`©ó AvqZ‡bi cv‡Î 4gHe, 14gN2 Ges 16gO2 Av‡Q| †KvbwUi AvswkK Pvc m‡ev©”P? [DU.2002-2003] A. He B. mKj AvswkK Pvc mgvb C. N2 D. O2 mwVK DËi: A. He e¨vL¨v: ‡UKwbK: hvi †gvj msL¨v ‡ewk Zvi AvswkK Pvc m‡ev©”P| AvswkK Pvc = †gvj fMœvskׇgvU Pvc cÖgvYt PHe= 0.50 1.0 0.5 0.5 1 1 ; N2 P = 0.25 1.0 0.5 0.5 0.5 1 O2 P = 0.25 1.0 0.5 0.5 0.5 1 03. wZb AvqZb bvB‡Uªv‡Rb I `yB AvqZb †K¬vwib wgkª‡bi c~Y© Pvc 1 atm (760 mm), H wgkª‡Y N2 I Cl2 Gi AvswkK Pvc KZ? [DU. 1999-00] A. 400 mm I 360 mm B. 500 mm I 260 C. 456 mm I 304 mm D. 350 I 410 mm mwVK DËi: C. 456 mm I 304 mm e¨vL¨v: ‡UKwbKt N2 P = 760 456 3 2 3 mm Cl2 P = 760 304 3 2 2 mm JU 01. GKwU cv‡Îi AvqZb 500 ml G 100 cm Hg Pv‡c Cl2 M¨vm Av‡Q| Bnv b‡ji mvnv‡h¨ ÷c K‡K©i Øviv Ab¨ GKwU 80 cm Hg Pv‡c N2 fwZ© 1000 ml AvqZb wewkó cv‡Îi mv‡_ hy³ Av‡Q| ÷c KK© Ly‡j w`‡j wgwkÖZ Pvc cm Hg-‡Z wb‡gœi †KvbwU? [JU. 2009-2010] A. 68.67 B. 86.67 C. 67.86 D. 76.86 mwVK DËi: B. 86.67 e¨vL¨v: 500 1000 100 500 80 1000 V V P V P V P 1 2 1 1 2 2 = 86.67 cm Hg Ans. RU 01. hLb M¨vm A Gi 7.0 †gvj Ges M¨vm B Gi 3.0 †gvj wgkv‡bv nq ZLb wgkÖ‡Yi †gvU Pvc nq 760 mm Hg| wgkÖ‡Yi A M¨v‡mi AvswkK Pvc KZ n‡e? [RU. 2019-20] A. 512 mm Hg B. 522 mm Hg C. 532 mm Hg D. 542 mm Hg mwVK DËi: C. 532 mm Hg e¨vL¨v: AvswkK Pvc : PA = XA.P = 7 7 + 3 760 760 = 0.7 atm = 532 mm (Hg) 02. 0 0C ZvcgvÎvq GKwU 10 L cv‡Î 2 g H2 Ges 8 g N2 ivL‡j M¨vm wgkª‡Yi †gvU Pvc n‡e? [RU. 2010-2011] A. 2.24 mm B. 2.88 mm C. 3.21 mm D. 0.64 mm mwVK DËi: B. 2.88 mm e¨vL¨v: 2.24 2 10 2 0.0821 273 MV mRT PH2 0.64 28 10 8 0.0821 273 MV mRT PN2 P P 2.88atm H2 N2 03. `ywU M¨vmxq Dcv`vb wewkó wm‡÷‡gi †gvU Pvc 0.5atm| GKwU Dcv`v‡bi †gvj fMœvsk 0.2 n‡j Zvi AvswkK Pvc KZ? [RU.2008-2009] A. 0.1 atm B. 0.01 atm C. 0.05 atm D. 0.02 atm mwVK DËi: A. 0.1 atm e¨vL¨v: AvswkK Pvc=‡gvj fMœvsk׆gvU Pvc =0.5×0.2 = 0.1| 04. 5.0 L AvqZ‡bi GKwU cv‡Î 90.0 kPa Pv‡c 1.0L bvB‡Uªv‡Rb M¨vm Ges 50.0 kPa Pv‡c 3.5L Aw·‡Rb M¨vm ivLv nj| D³ cv‡Î wgwkªZ M¨v‡mi †gvU Pvc- [RU.2006-2007] A. 23.0 kPa B. 41.2 kPa C. 53.0 kPa D. 61.0 kPa mwVK DËi: C. 53.0 kPa e¨vL¨v: PV = P1V1 + P2V2 P= 53.2Kpa 5 90 1.0 50.0 3.5 kPa CU 01. STP †Z †Kvb M¨v‡mi 1L G KZ †gvj M¨vm _v‡K? [CU:2013-2014] A. 2.24 B. 0.224 C. 4.5 D. 0.045 E. 0.45 mwVK DËi: D. 0.045 e¨vL¨v: n = V/22.4 = 1/22.4 = 0.045 IU 01. 6 kPa Pv‡c 2dm3 O2 †K GKwU 4dm3 AvqZ‡bi cv‡Î ivLv n‡j O2 Gi AvswkK Pvc KZ n‡e? [IU. 2008-09] A. 12kPa B. 5kPa C. 3kPa D. 9kPa mwVK DËi: C. 3kPa e¨vL¨v: 6 3kPa 4 2 O2 P STEP 02 ANALYSIS OF SCIENCE & TECHNOLOGY QUESTION JUST 01. GKwU M¨vm wgkª‡Y 56g N2, 44g CO2, Ges 16g CH4 eZ©gvb| wgkªYwUi †gvU Pvc 720 mm Hg n‡j wg‡_‡bi AvswkK Pvc KZ n‡e? [JUST-B. 2016-17] A. 180 atm B. 287 atm C. 187 atm D. 196 tam mwVK DËi: A. 180 atm e¨vL¨v: AvswkK Pvc = †gvj fMœvsk †gvU Pvc PCH 4 = 2 2 4 4 N CO CH CH N N N N 720 = 2 1 1 1 720 = 180

CHEMISTRY PLUS cwi‡ek imvqb 363 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES MBSTU 01. mgf‡ii CH4 I H2 ‡K k~b¨ cv‡Î 25C G ivLv nj| H2 Gi AvswkK Pvc †gvU Pv‡ci KZ fMœvsk? [MBSTU. B. 2016-17] A. 1/2 B. 1/9 C. 8/9 D. 16/17 mwVK DËi: C. 8/9 e¨vL¨v: H2 Gi AvswkK Pvc = 16 x 2 x 2 x ×P = 2 x × 9x 16 × P = .P 9 8 STEP 03 ANALYSIS OF ENGINEERING & BUTex QUESTION KUET 01. T ZvcgvÎv I P Pv‡c V AvqZ‡bi GKwU wgkªY‡K mgAvqZb A_v©r V AvqZ‡bi Aci GKwU wgkª‡Yi mv‡_ wgwkªZ Kiv nj hvi ZvcgvÎv I Pvc c~‡e©iwUi g‡ZvB h_vµ‡g T I P| T ZvcgvÎvq AvqZb V wVK ivLv n‡j wgkª‡Yi Pvc KZ n‡e? [KUET-2016-17] A. 2 P B. P2 C. P D. 2P E. 4P mwVK DËi: D. 2P e¨vL¨v: P'V = PV + PV P' = 2P [As V same] CUET 01. MigKv‡j evqy‡Z 250C G Rjxq ev‡®úi ‡gvj fMœvsk 0.0287 Ges evqyi †gvU Pvc 0.977 atm n‡j evqy‡Z Rjxq ev‡®úi AvswkK Pvc KZ n‡e? [CUET. 2015-16] A. 0.30atm B. 0.948atm C. 0.028atm D. 0.029atm mwVK DËi: C. 0.028atm e¨vL¨v: AvswkK Pvc = †gvj fMœvsk ‡gvU Pvc Pv = XvP = 0.02870.977 = 0.028 atm 02. 1L, 3L & 4L AvqZb wewkó wZbwU cvÎ GKwU wbw`©ó ZvcgvÎvq h_vµ‡g 2, 4 Ges 6 atm Pv‡c M¨vm Øviv c~Y©| cvÎ wZbwU ci¯úi mshy³ Ki‡j M¨v‡mi Pvc KZ atm n‡e? [CUET. 2015-16] A. 4.00 B. 4.75 C. 5.25 D. 5.50 E. 5.75 mwVK DËi: B. 4.75 e¨vL¨v: Ptotal = P1V1+ P2V2 + P3V3 V1 + V2 + V3 atm = (21)+(43)+(64) (1+3+4) atm = 4.75 atm BUTex 01. 28 MÖvg bvB‡Uªv‡Rb Ges 142g †K¬vwib M¨v‡mi wgkª‡Yi †gvU Pvc 12atm n‡j H wgkÖ‡Y bvB‡Uªv‡Rb M¨v‡mi AvswkK Pvc KZ? [BUTex. 2015-16] A. 8 atm B. 4 atm C. 6 atm D. 2 atm mwVK DËi: B. 4 atm e¨vL¨v: AvswkK Pvc= †gvj fMœvsk × †gvU Pvc 12 4atm 1 2 1 P 2 N 02. 29 C o ZvcgvÎvq 95KPa Pv‡c 3 0.25m bvB‡Uªv‡Rb I 80KPa Pv‡c 3 0.38m Aw·‡Rb 3 1m AvqZ‡bi GKwU d¬v‡· †bqv nj| wgwkªZ M¨v‡mi Pvc KZ? [BUTex. 2013-14] A. 40.44 KPa B. 49.15 KPa C. 54.15 KPa D. 58.22 KPa mwVK DËi: C. 54.15 KPa e¨vL¨v: V P V P V PV P V P V P 1 1 2 2 1 1 2 2 54.15kPa 1 95 0.25 80 0.38 STEP 04 ANALYSIS OF MEDICAL & HSC QUESTION MAT 01. mgvb f‡ii CH4 Ges O2 M¨vm GKwU wbw`©ó ZvcgvÎvq GKwU cv‡Î ivLv nj| †gvU cÖ`Ë Pv‡ci wK cwigvY Ask O2 Øviv cÖ`Ë n‡e?[MAT. 2015-16] A. 3 1 B. 2 1 C. 4 1 D. 3 2 mwVK DËi: A. 3 1 e¨vL¨v: Let, O2 and CH4 had taken x gm , Total Pressure = P 32 2 x nO , 4 16 x n CH Total mol = 32 x 16 x = 32 3x P 32 3x 32 x P X P O2 O2 3 1 P AZGe, Aw·‡Rb KZ…©K cÖ`Ë Pvc = 3 1 ‡gvU Pvc 02. GKwU cv‡Îi AvqZb 500 ml G 100 cm Hg Pv‡c Cl2 M¨vm Av‡Q| Bnv b‡ji mvnv‡h¨ ÷c K‡K©i Øviv Ab¨ GKwU 80 cm Hg Pv‡c fwZ© 1000 ml AvqZb wewkó cv‡Îi mv‡_ hy³ Av‡Q| ÷c KK© Ly‡j w`‡j wgwkªZ M¨v‡mi Pvc cm Hg-‡Z wb‡gœi †KvbwU? [MAT : 2007-2008] A. 76.86 B. 68.67 C. 86.67 D. 67.86 mwVK DËi: C. 86.67 e¨vL¨v: PT = P1V1 + P2 V2 V1 + V2 = (500 100) + (80 1000) 500 + 1000 = 50000 + 80000 1500 = 130000 1500 = 86.67 cm Hg †gwW‡K‡j weMZ cuvP eQ‡i cÖ_g gvngy` (2012-13), ïf (2016-17), BDmyd (2017-18), AY©e (2018-19) Ges ivMxe b~i (2019-20) m¤úvw`Z †`‡ki cÖ_g I AZzjbxq †gwW‡Kj wmwiR... Avm‡c± †gwW wmwiR [cvV¨eB‡K wUªKm I g‡b ivLvi †K․k‡j mnR Kivi cÖqvm] ∎ ASPECT MEDI CHEMISTRY ∎ ASPECT MEDI BIOLOGY ∎ ASPECT MEDI PHYSICS ∎ ASPECT MEDI GK ∎ ASPECT MEDI ENGLISH ∎ Avm‡c± †gwW PP©v [g‡Wj †U÷ I cÖkœe¨vsK]

364 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES MwZ‡eM I MwZkw³ m¤úwK©Z MvwYwZK cÖ‡qvM: Item-04 : Sub Item-01 : eM©g~j Mo eM©‡eM ev R.M.S †eM eM©g–j Mo eM©‡eM ev, R.M.S †eM: MwZkw³ msµvšÍ m~Î C = M 3RT = 157.94 M T = M 3PV = 3P n †gvj M¨v‡mi MwZkw³ K.E. = 2 3 nRT 1 wU AYyi MwZkw³ K.E. = NA 2 3RT eM©g~j Mo eM©‡eM wbY©q- †Kvb M¨v‡mi eM©g~j Mo eM©‡eM ev Cr.m.s. wbY©q Ki‡Z; Cr.m.s = 157.9 M T m~Î e¨envi Ki‡jB `ªæZ dj cvIqv hvq| Ex-01. 10°C ZvcgvÎvq nvB‡Wªv‡Rb AYyi r.m.s †eM ‡ei Ki? mgvavb: Cr.m.s= 157.9 2 283 157.9 M T = 1.87103ms–1 Ex-02. KZ ZvcgvÎvq CO2 Gi eM©g~j Mo eM©‡eM, 20C ZvcgvÎvq Cl2 Gi eM©g~j Mo eM©‡eM mgvb n‡e? [RUET .2008-09] mgvavb: CCO2 CCl2 = TCO2 MCl2 TCl2 MCO2 TCO2 71 293 44 = 1 TCO2 = 181.577 K (Ans.) | TCl2 = 293 K wb‡`©kbv: DËi mivmwi ms–1 GK‡K P‡j Avm‡e| hw` DËi cms–1 GK‡K _v‡K Z‡e 100 w`‡q ¸Y Ki‡Z n‡e| GQvov cms–1 GK‡K wb‡¤œv³ m~Î ¸‡jv g‡b ivL‡Z cvi- eM©g~j Mo eM©‡eM, Cr.m.s = 1.58104 M T mvaviY Mo MwZ‡eM, C = 1.45104 M T me‡P‡q †ewk m¤¢ve¨ MwZ‡eM, Cp = 1.29104 M T Abyiƒc fv‡e Abykxjb Ki‡e- 27°C ZvcgvÎvq Aw·‡Rb AYyi eM©g~j Mo eM© †eM wbY©q Ki? (Dt 483.62 ms–1 ) 25°C ZvcgvÎvq GKwU bvB‡Uªv‡Rb AYyi eM©g~j Mo eM©‡eM KZ? (Dt 515.24ms–1 ) 0°C ZvcgvÎvq GKwU M¨v‡mi eM©g~j Mo eM©‡eM cÖwZ †m‡K‡Û 49330cm| M¨vmwUi AvYweK fi KZ? (Dt 28g) 0°C ZvcgvÎvq O2 M¨vm AYyi eM©g~j Mo eM© †eM KZ? (4.6104 cms-1 ) Sub-Item-02 : MwZkw³ m¤úwK©Z MvwYwZK cÖ‡qvM ms‡ÿ‡c `ªæZ AsK Kivi Rb¨- a. MwZkw³, EK = 12.47nT b.GKwU AYyi MwZkw³ ev Mo MwZkw³, EK = 2.0710–23 T Ex-01. 27°C ZvcgvÎvq 5g Aw·‡Rb M¨v‡mi MwZkw³ KZ? mgvavb: Ek = 12.47 T M m = 12.47 300 32 5 = 584.5J Ex-02. 25°C ZvcgvÎvq GK AYy CO2 Gi Mo MwZkw³ KZ? mgvavb: GKwU Abyi MwZkw³, EK = 2.0710–23 T= 2.0710–23298 = 6.1710–21J REAL TEST ANALYSIS OF PREVIOUS YEAR QUESTIONS STEP 01 ANALYSIS OF GENERAL UNIVERSITY QUESTION DU 01. 300 K ZvcgvÎvq evZv‡mi N2 AYyi MwZ KZ? [DU. 2012-2013] A. 450 m/s 4B. 516 m/s C. 400 m/s D. 600 m/s mwVK DËi: B. 516 m/s e¨vL¨v: Cr.m.s= 157.9 28 300 157.9 M T = 516.95 ms–1 02. 27˚C ZvcgvÎvq bvB‡Uªv‡Rb M¨v‡mi AYyi eM©gyj Mo eM©‡eM KZ? [DU.2011-2012] A. 515.22 ms1 B. 516.95 ms1 C. 517.90 ms1 D.526.95ms1 mwVK DËi: B. 516.95 ms1 e¨vL¨v: Cr.m.s=157.9 28 300 157.9 M T = 516.95 ms–1 03. GKB ZvcgvÎvq H2 I O2 M¨v‡mi r.m.s †e‡Mi AbycvZ n‡”Q- [DU.2008-2009] A. 1/8 B. 4 1 C. 4 D. 8 mwVK DËi: C. 4 e¨vL¨v: ‡UKwbKt r.m.s.= 1/ 2 1 M 2 M = 4 1/ 2 2 32 1/ 2 2 M 32 M JU 01. 0C ZvcgvÎvq GKwU M¨v‡mi eM©g~j Mo eM©‡eM 493.3ms-1 M¨vmwUi AvYweK fi KZ? [JU. 2009-2010] A. 50 g B. 14 g C. 42 g D. 28 g mwVK DËi: D. 28 g e¨vL¨v: C 2 = M 3RT M= 3RT C 2 = 38.31273 (493.3) 2 =28 (MÖv‡g iæcvšÍi K‡i)

CHEMISTRY PLUS cwi‡ek imvqb 365 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES RU 01. 300 K ZvcgvÎvq R.M.S †eM m‡e©v”P n‡e †KvbwUi? [RU-C3.2017-18] A. O2 B. N2 C. CO2 D. CH4 mwVK DËi: D. CH4 e¨vL¨v: R.M.S M 1 O2 Gi AvYweK fi 32g, N2 Gi AvYweK fi 28g, CO2 Gi AvYweK fi 44g Ges CH4 Gi AvYweK fi 16g| CH4 Gi AvYweK fi me‡P‡q Kg e‡j CH4 Gi R.M.S †eM m‡e©v”P n‡e| 02. RMS ‡eM- [RU-H3.2017-18] A. RT 2 3 B. M 8RT C. M 3RT D. RT M w mwVK DËi: C. M 3RT e¨vL¨v: M RT C M RT C M RT Crms av 2 , 8 , 3 max 03. 29°C ZvcgvÎvq 3 gm bvB‡Uªv‡Rb M¨v‡mi †gvU MwZkw³ 403 Ryj| †Kvb ZvcgvÎvq bvB‡Uªv‡Rb M¨v‡mi †gvU MwZkw³ 1.5 ¸Y n‡e?[RU-H3.2017-18] A. 455K B. 460K C. 450K D. 453K mwVK DËi: D. 453°K e¨vL¨v: Ek = 3 2 nRT ; Ek2 Ek1 = T2 T1 ev, 1.5 1 = T2 302 ev, T2 = 453°K 04. 32K ZvcgvÎvq Aw·‡Rb M¨v‡mi R.M.S. †eM KZ? [RU-H2.2017-18] A. R B. 6R C. 3R D. 2 3R mwVK DËi: C. 3R e¨vL¨v: Crms = 32 3 3 32 R M RT = 3R 05. 27C ZvcgvÎvq 4gm O2 M¨v‡mi MwZkw³ (Ryj-GK‡K) wbY©‡qi mwVK mgxKiY †KvbwU? [RU-H2.2017-18] A. K.E =(28.3143004)÷(332) B. K.E =(38.3143004)÷(232) C. K.E =(31.9873004)÷(232) D. K.E =(28.314274)÷(332) mwVK DËi: B. K.E =(38.3143004)÷(232) e¨vL¨v: Ek = 2 3 RT M m = 2 3 32 4 8.31300 = (38.313004)÷(232) 06. GKwU wbw`©ó ZvcgvÎv I Pv‡c O2 M¨v‡mi e¨vcb nvi 30 m3 /s n‡j D³ ZvcgvÎvq CO2-Gi e¨vcb nvi KZ? [RU. 2012-2013] A. 26 m3 /s B. 25.58 m3 /s C. 25.85 m3 /s D. 25.67 m3 /s mwVK DËi: B. 25.58 m3 /s e¨vL¨v: 2 2 2 2 0 O CO CO M M r r ev, 32 30 44 2 rCO ev, 25.58 07. 0˚C ZvcgvÎvq GKwU M¨v‡mi eM©g~j Mo eM©‡eM cÖwZ †m‡K‡Û 49330 cm| M¨vmwUi AvYweK fi KZ? [RU. 2012-2013] A. 24 B. 27 C. 28 D. 26 mwVK DËi: C. 28 e¨vL¨v: M 28 M 273 157.9 100 49330 M T C 157.9 r.m.s 08. 20°C ZvcgvÎvq nvB‡Wªv‡Rb AYyi eM©g~j-Mo-eM© KZ? [RU. 2009-2010] A. 1.87 103 ms-1 B. 7.81 103 ms-1 C. 1.91 103 ms-1 D.9.11 103 ms-1 mwVK DËi: C. 1.91 103 ms-1 e¨vL¨v: Cr.m.s= 157.9 2 293 157.9 M T 1.91 10 ms (Ans) 3 1 CU 01. GK Ryj mgvb KZ K¨vjwi? [CU. 2003-2004] A. 0.250 cal B. 0.239 cal C. 432 cal D. 0.125 cal mwVK DËi: B. 0.239 cal e¨vL¨v: 4.2 J = 1cal 1J = 1 4.2 cal = 0.239 cal IU 01. 30°C ZvcgvÎvq 1 †gvj CO2 Gi MwZkw³- [IU-D. 2016-17] A. 3500 Ryj B. 3779.6 Ryj C. 4000 Ryj D. 450036 Ryj mwVK DËi: B. 3779.6 Ryj e¨vL¨v: EK = 2 3 nRT= 38.314(273+30) 2 = 3779.6 STEP 02 ANALYSIS OF SCIENCE & TECHNOLOGY QUESTION SUST 01. 27ºC ZvcgvÎvq GKwU bvB‡Uªv‡Rb AYyi eM©g~j Mo eM©‡eM KZ m/s? [SUST-B,2018-19] A. 49 B. 16.4 C. 517 D. 155 E. 713 mwVK DËi: C. 517 e¨vL¨v: 517 28 300 157.97 157.97 M T Crms m/s 02. 25°C ZvcgvÎvq 22 g CO2 M¨v‡mi AYymg~‡ni MwZkw³ KZ? [SUST: 2010-11] A.1858.179J B.929.989J C.84.461J D. 0J mwVK DËi: A. 1858.179J e¨vL¨v: ‡UKwbK Abyhvqx, Ek = 12.47 nT = 12.47 W M T = 12.47 0.5 298 = 1858.179 J 03. 25C ZvcgvÎv 22gCO2 M¨v‡mi AYymg~‡ni MwZkw³ KZ? [SUST. 10-11] A. 1858.179 J B. 929.089 J C. 84.461 J D. 0 J mwVK DËi: A. 1858.179 J 04. KZ K ZvcgvÎvq CO2 Gi eM©g~j Mo eM©‡eM, 293 K ZvcgvÎvq Cl2 Gi eM©g~j Mo eM©‡e‡Mi mgvb n‡e? [SUST:2008-09] A. 181.6 B. 206 C. 311 D. 150 mwVK DËi: A. 181.6 e¨vL¨v: kZ©bymv‡i, C1 = C2 T1M2 = M1T2 T1 = 2 1 2 M M T = 181.577 181.6 71 44 293 JUST 01. 40˚C DòZv I 1.5 atm Pv‡c NH3 AYyi RMS †eM KZ? [JUST-A: 2019-20] A. 663.7 ms–1 B. 667.7 ms–1 C. 671.7 ms–1 D. 677.7 ms–1 mwVK DËi: D. 677.7 ms–1 e¨vL¨v: RMS †eM, Crms = 3RT M = 3 8.314 313 17 1000 = 677.66 ms–1

366 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 02. 25C ZvcgvÎvq 5.0 g Aw·‡Rb M¨v‡mi MwZkw³ KZ? [JUST-A: 2018-19] A. 571.78 J B. 580.68 J C. 850.58 J D. 790.38 J mwVK DËi: B. 580.68 J e¨vL¨v: T M w Ek 12.47nT 12.47 298 580.63J 32 5 12.47 03. 27C ZvcgvÎvq 56 gm N2 M¨v‡mi MwZkw³ KZ? [JUST-A. 2016-17, P.‡ev. 2016] A.7483 J B. 7.5×105 erg C. 8×103 J D. 7.6 KJ E. 7421 J mwVK DËi: A.7483 J e¨vL¨v: Ek = 2 3 nRT= 2 3 × 28 56 ×300×8.314 =7483J STEP 03 ANALYSIS OF ENGINEERING & BUTex QUESTION KUET 01. GKwU M¨v‡mi AvYweK fi 32 n‡j KZ ZvcgvÎv‡Z D³ M¨v‡mi eM©g~j Mo eM©‡eM cÖwZ †m‡K‡Û 50550cm n‡e? [KUET. 2014-15] A. 327.766C B. 54.76C C. 273C D. 52.76C E. 27.38C mwVK DËi: B. 54.76C e¨vL¨v: Crms = M 3RT = 505.5 = 3 32 10 3 8.31 T = 505.5 T = 327.76K = 54.76ºC 02. 15C ZvcgvÎvq 1.0 †gvj O2 M¨v‡mi MwZkw³ 3.6 103 J n‡j ÔR’ Gi gvb KZ n‡e? [KUET:2013-2014] A. 8.314J B. 8.791J C. 160.00J D. 8.333J E. 8.316J mwVK DËi: D. 8.333J e¨vL¨v: R 288 R 8.333J 2 3 3.6 103 MÖvnv‡gi e¨vcb m~Î m¤úwK©Z MvwYwZK cÖ‡qvM- Item-05 : MÖvnv‡gi e¨vcb m~Î ms‡KwZ wPý 1 2 2 1 d d r r = 1 2 M M = 1 2 2 1 V V t t Av‡cwÿK NbZ¡ MYbvt GKB ZvcgvÎv I Pv‡c Kve©b WvBA·vBW Ges I‡Rv‡bi e¨vcb cÖwµqvi nvi h_vµ‡g 0.29m3 /sec. Ges 0.291m3 /sec.| Kve©b WvBA·vB‡Wi Av‡cwÿK NbZ¡ 22.0 n‡j I‡Rv‡bi Av‡cwÿK NbZ¡ KZ? mgvavb: MÖvnv‡gi e¨vcb m~Î ‡_‡K1 2 2 1 d d r r ev, 0.29 0.29 = d2 22.0 = 22.0 AvYweK fi MYbvt 25°C ZvcgvÎvq CO2 I ARvbv GKwU M¨v‡mi e¨vcb cÖwµqvi nvi h_vµ‡g 218m3 /sec. I 436 m3 /sec. ARvbv M¨vmwUi AvYweK fi KZ? mgvavb: MÖvnv‡gi e¨vcb m~Î †_‡K1 2 2 1 M M r r ev, 2 2 2 1 1 2 r M r M = 44 218 436 2 = 44 1 4 = 11 e¨vcb cÖwµqvi e¨vwß MYbvt cÖgvY DòZv I Pv‡c wQ`ªhy³ †Kvb cvÎ †_‡K 5.0 wgwb‡U 1.0 Liter H2 M¨vm wbM©Z n‡j GKB mg‡q H cvÎ †_‡K wK cwigvY Aw·‡Rb M¨vm wbM©Z n‡e? mgvavb: V1 V2 = M2 M1 V2 = 1 2 32 = 1 16 = 1 4 = 0.25 (Ans.) 27˚C ZvcgvÎvq I 760 mm(Hg) Pv‡c 0.5g A M¨vm 300 mL AvqZb `Lj K‡i| GKB ZvcgvÎvq 770mm(Hg) Pv‡c 0.6g B M¨vm 400 mL AvqZb `Lj K‡i| GKB ZvcgvÎv I Pv‡c A I B M¨v‡mi g‡a¨ †KvbwUi e¨vc‡bi nvi †ewk| [BUTEX: 19-20] mgvavb: Avgiv Rvwb, rA rB = MB MA = WBRT PBVB WART PAVA = WBPAVA WAPBVB = 0.6 760 300 0.5 770 400 = 0.94 rA < rB B M¨v‡mi e¨vc‡bi nvi †ewk| REAL TEST ANALYSIS OF PREVIOUS YEAR QUESTIONS STEP 01 ANALYSIS OF GENERAL UNIVERSITY QUESTION RU 01. M¨vm X-Gi e¨vcb nvi M¨vm Y e¨vcb nv‡ii wظY| X Gi ev®úxq NbZ¡ 2 n‡j Y M¨vmwUi AvYweK fi KZ n‡e? [RU. 2010-2011] A. 2 B. 4 C. 8 D. 16 mwVK DËi: D. 16 e¨vL¨v: x y y x d d r r ev, d 8 2 d r 2r y y AvYweK fi = ev®ú NbZ¡ 2 = 8 2 = 16 KU 01. GKwU AÁvZ M¨v‡mi e¨vcb nvi A¨v‡gvwbqv M¨v‡mi e¨vcb nv‡ii 2.92 ¸Y n‡j M¨vmwUi AvYweK fi KZ? [KU. 2019-20] A. 0.17 B. 0.50 C. 1.99 D. 5.82 mwVK DËi: C. 1.99

CHEMISTRY PLUS cwi‡ek imvqb 367 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 25cm HCl NH3 NH4Cl e¨vL¨v: r1 r2 = M2 M1 r1 r 2.92r = M2 17 M2 = 1.99 awi, NH3 Gi e¨vcb nvi, r1 = r Zvn‡j r2 = 2.92 r 02. GKB AvqZ‡bi GKwU AÁvZ M¨vm I †K¬vwib GKB ZvcgvÎv I Pv‡c GKwU wQ`ªc_ w`‡q wbtmwiZ n‡Z h_vµ‡g 60 †m‡KÛ I 73 †m‡KÛ mgq †bq| AÁvZ M¨vmwUi AvYweK fi KZ? [KU-A.2017-18] A. 46 B. 48 C. 50 D. 52 mwVK DËi: B. 48 e¨vL¨v: 1 2 1 2 2 1 2 1 2 M t t M M M t t 71 48 73 60 2 STEP 02 ANALYSIS OF SCIENCE & TECHNOLOGY QUESTION SUST 01. GKwU wbw`©ó ZvcgvÎv I Pv‡c NH3 M¨v‡mi e¨vcb nvi 10 2 m 3 /s n‡j D³ Ae¯
vq H2S M¨v‡mi e¨vcb nvi KZ m 3 /s? [SUST:2007-08] A. 5 2 B. 20 C. 10 D. 20 2 mwVK DËi: C. 10 e¨vL¨v: r1 r2 = M2 M1 = 34 17 r2 = 10 2 2 = 2 r2 = 10 STEP 03 ANALYSIS OF ENGINEERING & BUTex QUESTION KUET 01. GKwU miæ wQ`ª hy³ wQwc w`‡q †h mg‡q 2.0m3 evZvm cÖevwnZ nq D³ miæ wQ`ªhy³ wQwc w`‡q GKB mg‡q KZ m 3 nvB‡Wªv‡Rb cÖevwnZ n‡e? [evZv‡mi Av‡cwÿK NbZ¡ = 14.4] [KUET. 2015-16] A. 3.79 B. 17.40 C. 7.20 D. 28.8 E. 7.59 mwVK DËi: E.7.59 m3 e¨vL¨v: r1 r2 = V1 V2 = 1 2 d d V1 = V2 1 2 d d = 2 14.4 = 7.59 m3 14.4 d d 1 2 BUTex 01. NaCl †Kjv‡mi AvqwbK e¨vmv‡a©i AbycvZ 0.53 nB‡j Na+ Gi mwbœ‡ek msL¨v KZ? [BUTex: 2012-2013] A. 2 B. 4 C. 6 D. 8 mwVK DËi: C. 6 e¨vL¨v: AbycvZ 0.77 n‡Z 0.414 Gi g‡a¨ n‡j mwbœ‡ek msL¨v 6 nq| STEP 04 ANALYSIS OF MEDICAL & HSC QUESTION MAT 01. GKB ZvcgvÎv I Pv‡c †Kvb cv‡Îi GKB wQ`ªc‡_ GKwU AÁvZ M¨vm I †K¬vwi‡bi c„_Kfv‡e wbtmi‡Yi nvi h_vµ‡g 6 : 5| †K¬vwi‡bi NbZ¡ 36 n‡j AÁvZ M¨v‡mi NbZ¡ wb‡gœi †KvbwU? [MAT: 2007-2008] A. 40 B. 25 C. 50 D. 20 mwVK DËi: B. 25 e¨vL¨v: r1 r2 = d2 d1 d2 d1 = r1 r2 2 d1 = d2 r2 r1 2 = 36 5 6 2 = 36 25 36 = 25 d1 = 25 mKj cvV¨eB‡qi cÖkœ NCTB QUESTIONS ANALYSIS e¨vL¨vmn mgvavb nvRvix bvM 01. †g‡mvwùqv‡ii D”PZv KZ wK.wg. ch©šÍ we¯Í…Z? [Kz.‡ev.2017] A. 5-10 km B. 10-40 km C. 50-85 km D. 150-200 km Ans C 02. evqygЇji ÷ª¨v‡Uvwùqvi ¯Í‡ii cÖavb Dcv`vb †KvbwU? [e.‡ev.2016] A. Aw·‡Rb B. wbqb C. I‡Rvb D. Kve©b WvB A·vBW Ans C 03. evqygЇji †nv‡gvwùqv‡i wb‡Pi †KvbwU _v‡K bv? A. AvM©b B. O2 C. O D. CH4 Ans D 04. evqygЇji †Kvb ¯Í‡ii ZvcgvÎv me©v‡cÿv †ewk? [P.‡ev.2015] A. Uª‡cvwùqvi B. Uª¨v‡Uvwùqvi C. †g‡mvwùqvi D. _v‡g©vwùqvi Ans D 05. evqygЇji kxZjZg AÂj †KvbwU? [e.‡ev.2017] A. †g‡mvwùqvi B. Avq‡bvwùqvi C. Uª‡cvwùqvi D. ÷ª¨v‡Uvwùqvi Ans A 06. I‡Rvb¯Íi evqygЇji †Kvb A‡j Aew¯
Z? [gv.‡ev.2017] A. Uª‡cvwùqvi B. ÷ª¨v‡Uvwùqvi C. †g‡mvwùqvi D. _v‡g©vwùqvi Ans B 07. evqygЇji †Kvb A‡j So-Gi DrcwË N‡U? A. Uª‡cvwùqvi B. ÷ª¨v‡Uvwùqvi C. †g‡mvwùqvi D. _v‡g©vwùqvi Ans A 08. mvB‡K¬vb •Zwi n‡Z mvM‡ii cvwbi ZvcgvÎvq me©wb¤œ KZ _vK‡Z nq? A. 25C B. 27C C. 30C D. 40C Ans B 09. Av`k© M¨v‡mi MZxq mgxKiY †KvbwU? A. PV = nRT B. PV= 3 1 mNc2 C. PV = RT D. PV = P1V1 Ans B Why PV = nRT, n ‡gvj M¨v‡mi Rb¨ Av`k© M¨vm mgxKiY| PV = 3 1 mNC2 Av`k© M¨v‡mi MZxq mgxKiY| PV = RT, 1 ‡gvj M¨v‡mi Rb¨ Av`k© M¨vm mgxKiY| P1V1 = P2V2, e‡qj Gi m~‡Îi MvwYwZK iƒc| 10. mgf‡ii CH4 I H2 †K k~b¨cv‡Î 25C G ivLv n‡jv| H2 Gi AvswkK Pvc †gvU Pv‡ci fMœvsk n‡e Ñ A. 1 2 B. 1 9 C. 8 9 D. 16 17 Ans C Why 9 8 .1 16 1 2 1 2 1 .P H CH H H 4 n 2 n 2 n 2 P [mgfi‡K 1 aiv n‡q‡Q] 11. 25cm KuvPb‡ji 1g gy‡L HCl 2q gy‡L NH3 GK mv‡_ XzKv‡j NH4Cl Gi †avuqv m„wó nqÑ A. b‡ji gvSLv‡b B. 1g gyL †_‡K 15cm C. 1g gyL †_‡K 10cm D. 12cm G Ans C Why HCl Gi AvYweK fi 36.5 , NH3 Gi AvYweK fi 17 A_¨v©r, HCl Gi Zzjbvq NH3 KvuPb‡ji g‡a¨ ‡ewk `~iæZ¡ AwZµg K‡i wewµqv K‡i NH4Cl Gi †auvqv m„wó Ki‡e|

368 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES P –1 (atm) ‡jLwPÎ Ñ (i) V(L) T3 T2 T1 P ‡jLwPÎÑ(ii) PV T3 T2 T1 –273C †jLwPÎÑ(iii) 0C 273C VO 2VO P –1 V T3 T2 T1 V(L) P T3 T T2 1 P PV T3 T2 T1 mgZvcxq †iLv 12. d‡Uv‡KwgK¨vj †¯§vM •Zwi‡Z †Kvb evqy`~lK f~wgKv iv‡L bv? A. nvB‡WªvKve©b B. NO2 C. O3 D. CFC Ans D Why NO, NO2, O3 I Ab¨Zg evqy`~lK wW‡Rj Bwćb `nbgy³ nvB‡WªvKve©b Ges wewfbœ wd« †iwW‡Kj wg‡j cviw· A¨vmvBj bvB‡UªU (PANS) bv‡g wgkÖ evqy `~lK m„wó K‡i| [Ref: nvRvix/c„ôv: 25] 13. AvB‡mv_vg© ev m‡gvò‡jL A¼b Ki‡Z wZbwU wkÿv_©x wb¤œiƒc †jLwPÎ A¼b Kij: wb‡Pi †KvbwU mwVK? A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans A Why (i) I (ii) mgZvcxq †iLv| (iii) mgPvcxq †iLv 14. FGD cøv‡›U d¬z M¨v‡mi SO2 M¨vm Dcv`vb †kvlY Kv‡R e¨eüZ wewµqv n‡jv- (i) Ca(OH)2(aq)+SO2(g)CaSO3(s)+H2O(l) (ii) 2H2S(g) + SO2(g)2H2O(l) (s) + 3S(s) (iii) CaCO3(s)+SO2(g)CaSO3(s)+CO2(g) wb‡Pi †KvbwU mwVK A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans B Why wkí KviLvbvi wPgwb w`‡q wbM©Z SO2 M¨vm wgwkªZ d¬z-M¨vm (Flue gas) †K Pzbvcv_i ev Pz‡bi cvwbi wgkª‡Y Pvjbv Kiv nq; G‡Z SO2 †kvwlZ nq; G‡K d¬z-M¨vm wWmvjdvwi‡Rkb ev FGD cøv›U e‡j| G FGD cø¨v‡›U Drcbœ wRcmvg dry wall •Zwi‡Z e¨eüZ nq| 15. STP †Z H H2 M¨v‡mi AvqZb n‡e Ñ A. 0.06L B. 0.567L C. 0.65L D. 0.567L Ans B Kexi iweDj 01. evqygЇji ÷ªv‡Uvwùqvi ¯Í‡ii cÖavb Dcv`vb n‡jvA. O2 B. Ne C. O3 D. CO2 Ans C Why evqygЇji †ewkifvM I‡Rvb ÷ª¨v‡Uvwùqvi ¯Í‡i _v‡K| G I‡Rvb (O3) m~h© †_‡K Avmv ÿwZKi AwZ‡e¸wb iwk¥ †kvlY K‡i †bq| G ¯Í‡i †Kvb Rjxq ev®ú _v‡K bv| ZvB So-e„wó I _v‡K bv| AvenvIqv _v‡K ï®‥ I kvšÍ| d‡j G ¯Í‡ii wfZi w`‡q †RU wegvb PjvPj K‡i| 02. Uª‡cvgÛ‡j Ñ (i) D”PZv e„w×i m‡½ evZv‡mi MwZ‡eM n«vm cvq (ii) wbP †_‡K Dc‡ii w`‡K ZvcgvÎv Kg‡Z _v‡K (iii) Rjxq ev®ú wb‡Pi w`‡K †ewk _v‡K wb‡Pi †KvbwU mwVK? A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans B 03. ÷ª¨v‡UvgЇj †RU wegvb PjvPj K‡i| KviY, G ¯Í‡ii) ‡Kvb Rjxq ev®ú _v‡K bv ii) So e„wó _v‡K bv e‡j AvenvIqv kvšÍ iii) evqyi NbZ¡ Kg e‡j Nl©YRwbZ wecwË Kg _v‡K wb‡Pi ‡KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans D 04. ‡Kv‡bv ¯
v‡bi AvenvIqv I Rjevqy‡K wbqš¿Y K‡i †KvbwU? A. ÷ªv‡Uvwùqvi Gi evqygÐj B. Uª‡cvwùqvi Gi evqygÐj C. Avq‡bvwùqvi Gi evqygÐj D. ‡g‡mvwùqvi Gi evqygÐj Ans B Why f~-c„ó msjMœ evqygЇji me©wb¤œ ‡h ¯ÍiwU‡Z gvbyl I Ab¨vb¨ Rxe evm K‡i Zv‡K Uª‡cvwùqvi e‡j| G ¯ÍiwU f~-c„ô ‡_‡K 11km ch©šÍ we¯Í…Z G ¯ÍiwU‡Z So, e„wó cÖf…wZ cÖvK…wZK NUbv N‡U _v‡K| 05. CO2 M¨v‡mi `ywU cÖavb MÖvnK (Sink) Kx? A. Dw™¢` I evqygÐj B. mgy`ª I Dw™¢` C. ebf~wg I cvwb D. Dw™¢` I Rxevk¥ R¡vjvwb Ans B 06. Avgiv Rvwb, PV = nRT (i) AwZ wb¤œPv‡c I D”P ZvcgvÎvq N2, O2, CO2 cÖf…wZ M¨vm G mgxKiYwU AbymiY K‡i (ii) D”P MwZkw³i M¨vm AYy G mgxKiYwU †g‡b Pj‡Z cv‡i bv (iii) G mgxKiYwU †_‡K e‡q‡ji m~Î cvIqv hvq wb‡Pi †KvbwU mwVK? A. ii B. i, ii I iii C. ii I iii D. i I iii Ans D Why H2, N2, CO2 wb¤œ ZvcgvÎv I D”P Pv‡c Av`k© AvPiY ‡_‡K wePz¨Z nq wKš‧ D”P ZvcgvÎv I wb¤œ Pv‡c Avevi Av`k© M¨v‡mi AvPib cÖ`k©b K‡i| 07. NH3 + HCl ⇌ NH4 + + CI– mgxKiY Abymv‡i NH4 + AvqbwU NH3 Gi AbyeÜx KviY Ñ (i) NH3 cÖkwgZ n‡q NH4 + Avqb MwVZ n‡q‡Q (ii) NH3 ‡cÖvUb MÖnY K‡i NH4 + Avq‡b cwiewZ©Z nq (iii) NH4 + Avqb †cÖvUb Z¨vM K‡i NH3 G cwiYZ nq wb‡Pi †KvbwU mwVKA. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans C 08. 1.0 †gvj M¨v‡mi ZvcgvÎv 1.0K e„w× Ki‡j †h m¤úªmviYRwbZ KvR m¤úbœ nq Zvi bvg Ñ A. M¨v‡mi cÖmviv¼ B. Av`k© M¨vm aªæeK (R) C. ms‡KvPbkxjZv ¸Yv¼ (Z) D. AvqZbRwbZ f¨vÛviIqvjm aªæeK (a) Ans B 09. H2 Ges O2 Gi g‡a¨ e¨vcb nvi †KvbwU †ewk? A. H2 B. O2 C. mgvb D. Gfv‡e ejv hvq bv Ans A Why H2 Gi AvYweK fi O2 Gi Zzjbvq Kg nIqvq H2 Gi e¨vc‡bi nvi ‡ewk| 10. R wK‡mi cwigvcK? A. ej B. Pvc C. KvR D. kw³ Ans C Why 1mol M¨v‡mi ZvcgvÎv 1°C evov‡Z H M¨vm KZ…©K ‡h cwigvY KvR msNwUZ nq, Zvi cwigvY Øviv ‡gvjvi M¨vm aªæeK R ‡K msÁvwqZ Kiv nq| 11. N2 KLb Av`k© AvPiY cÖ`k©b K‡i? A. wb¤œPvc I D”PZvcgvÎvq B. D”P Pvc I wb¤œZv‡c C. mvaviY Ae¯
vq D. wb¤œPv‡c I wb¤œ ZvcgvÎvq Ans A 12. NTP †Z GKwU Av`k© M¨v‡mi ms‡KvPbkxjZv ¸Yv¼ (Z) Gi gvb KZ? A. 2.0 B. 1.5 C. 1.0 D. 3.0 Ans C Why Z = PV RT = 1 (Av`k© M¨v‡mi ‡ÿ‡Î) 13. H2 M¨vm mvaviY Ae¯
vq †Kvb mgxKiYwU AbymiY K‡i? A. PV = nRT B. V nb nRT v n a P 2 2 C. †KvbwUB bq D. PV = RT Ans B e¨vL¨v: H2 ev¯Íe M¨vm ZvB f¨vbWviIqvjm mgxKiY †g‡b P‡j|

CHEMISTRY PLUS cwi‡ek imvqb 369 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES T3 T2 T1 P PV 14. wb‡¤œi †Kvb ZvcgvÎvq CO2 M¨vm Zij nq bv? A. 31.1C B. 28.5C C. 32C D. 30C Ans C Why CO2 Gi msKU ZvcgvÎv 31.1°C ZvB G‡K 31.1°C ZvcgvÎvi Dc‡i ‡Kvb ZvcgvÎvq Zi‡j cwiYZ Kiv m¤¢e bv| 15. 22g CO2 M¨v‡mi Rb¨ Av`k© M¨vm mgxKiY wK? A. PV = nRT B. PV = RT C. PV = 2RT D. PV = 1 2 RT Ans D Why PV = nRT PV = m M RT PV = 22 44 RT PV = 1 2 RT 16. ZvccÖ‡qv‡M Mjvbv‡¼ †c․Qv‡bvi c~‡e©B †Kvb c`v_©wUi †Kjvm KvVv‡gv bó nq? A. NaCl B. MÖvdvBU C. CuSO4.5H2O D. eid Ans C Why nvB‡WªU ‡Kjvm mg~n A`vbv`vi| nvB‡Wª‡Ui ‡Kjv‡mi g‡a¨ cvwbi mv‡_ avZe je‡Yi g‡a¨ we`¨gvb eÜb ZvccÖ‡qv‡Mi d‡j ‡f‡½ hvq d‡j Mjbv‡¼ ‡c․Qv‡bvi c~‡e©B c`v_©wUi ‡Kjvm KvVv‡gv bó nq| 17. NTP †Z 1.0L M¨v‡mi fi 0.09g M¨vmwU Kx? A. O2 B. H2 C. N2 D. CO2 Ans B 18. ‡KvbwU `vbv`vi c`v_© bq? A. KuvP B. CsCl C. Na2SO4.10H2O D. CaO Ans C 19. ‡KvbwU ¯^Ztù~Z© cÖwµqv? A. e¨vcb B. wbtmiY C. †KvbwUB bq D. DfqwUB Ans A 20. c`v‡_©i †f․Z Ae¯
v KLb M¨vmxq nq? A. AvšÍtKYv AvKl©Y MwZkw³ B. AvšÍtKYv AvKl©Y< MwZkw³ C. AvšÍtKYv AvKl©Y MwZkw³ D. c`v‡_©i Ae¯
vi m‡½ G‡`i m¤úK© †bB Ans B 21. wZbwU M¨vm A, B Ges C Gi mwÜ ZvcgvÎv h_vµ‡g 31C, –57C Ges– 80C, Kÿ ZvcgvÎv 30C n‡j †Kvb M¨vmwU me‡P‡q mn‡R Zij nq? A. A B. B C. C D. ‡KvbwUB bq Ans A Why Avgiv Rvwb, mwÜ ZvcgvÎvi Dc‡i ‡Kvb M¨vm‡K Zi‡j cwiYZ Kiv hvq bv| A, B, C wZbwU M¨v‡mi µvwšÍ ZvcgvÎv h_vµ‡g 31°C, -57°C I -80°C Ges Kÿ ZvcgvÎv 30°C n‡j- –57°C < 30°C; –80°C < 30°C; 31°C > 30°C A_¨©vr, A M¨vmwU‡K mn‡R Zij Kiv hv‡e| 22. K T P m¤úK©wU †Kvb M¨vm m~·K cÖKvk K‡i? A. e‡q‡ji m~Î B. Pvj©m m~Î C. Pvcxq m~Î D. A¨v‡fv‡M‡Wªv ZË¡ Ans C 23. 1.0L AvqZ‡bi GKwU cv‡Î 0.25g O2, 0.25g N2 Ges 0.25g CO2 M¨vm wgwkÖZ Av‡Q| wgkÖ‡Y †Kvb M¨vmwUi AvswkK Pvc mev©waK? A. O2 B. N2 C. CO2 D. O2 Ges N2 Ans B Why nO2 = 0.25/32 = 0.008mol; nN2 = 0.25 28 = 0.009mol nCO2 = 0.25 44 = 0.006mol N2 Gi ‡gvj msL¨v ‡ewk ZvB AvswkK Pvc ‡ewk| mwÄZ Kzgvi ¸n m¨vi 01. mgvb f‡ii `ywU M¨vm A I B GKB Pvc I ZvcgvÎvq `ywU c„_K cv‡Î ivLv Av‡Q| A I B Gi AvYweK f‡ii AbycvZ n‡j 2 : 3 cvÎ `ywUi AvqZ‡bi AbycvZ n‡eA. 2 : 3 B. 3 : 2 C. 4 : 3 D. 3 : 4 Ans B Why 3 2 1 1 2 1 2 1 2 1 1 2 2 1 V V M M V V M M V V V1 : V2 = 3 : 2 02. NH3, CO2, O2, I H2 Gi g‡a¨ e¨vc‡bi nv‡ii m¤úK©Ñ A. 2 r 3 r 2 r 2 rH O NH CO B. 2 r 2 r 3 r 2 rH NH O CO C. 2 r 2 r 3 r 2 rH NH CO O D. 2 r 3 r 2 r 2 rH O NH CO Ans B Why ‡Kvb M¨v‡mi e¨vc‡bi nvi, Zvi AvYweK f‡ii eM© g~‡ji e¨¯ÍvbycvwZK| A_v©r AvYweK fi ‡ewk n‡j e¨vc‡bi nvi n«vm cvq| 1 2 2 1 M M r r 2 2 1 1 M 1 ,r M 1 r myZivs AvYweK f‡ii µg Abymv‡i e¨vcb nv‡ii m¤úK© n‡e rH2 > rNH3 > rO2 > rCO2 03. LPG M¨v‡mi g‡a¨ mvaviYZ _v‡K Ñ A. C3 I C4 Kve©b cigvYy hy³ A¨vj‡Kb B. C3 I C4 Kve©b cigvYy hy³ A¨vjwKb C. C3 I C4 Kve©b cigvYy hy³ mij A¨vjwKb I A¨vj‡Kb D. C2, C3 I C4 Kve©b cigvYy hy³ A¨vj‡Kb I A¨vjwKb Ans C Why LPG M¨vm nj wb¤œ AvYweK fi wewkó nvB‡WªvKve©‡bi wgkÖY| G LPG M¨v‡mi g‡a¨ C3 I C4 Kve©b cigvYy wewkó A¨vj‡Kb I A¨vjwKb ‡kÖYxi M¨vm _v‡K| 04. CH3–COOH ÿviK wnmv‡e KvR K‡i Kvi Dcw¯
‡Z? A. H–COOH B. H2CO3 C. NH3 D. H2SO4 Ans D Why Kgkw³kvjx •Re GwmW ¸‡jv kw³kvjx A‣Re Gwm‡Wi Dcw¯
wZ‡Z ÿviK wn‡m‡e KvR K‡i| CH3 – COOH `ye©j •Re GwmW Ges H2SO4 kw³kvjx A‣Re GwmW| 05. eRªcv‡Zi mgq wµqvkxj nq Ñ (i) N2 M¨vm (ii) O2 M¨vm (iii) CO2 M¨vm wb‡Pi †KvbwU mwVK? A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans A Why eRªcv‡Zi mgq D”PZvcgvÎvq evqygЇji wKQz cwigvY N2 I O2 M¨vm wewµqv K‡i cÖ_‡g NO I c‡i wb¤œ ZvcgvÎvq NO2 Drcbœ K‡i| gwbgyj AvwbKv BDmyd 01. evqygЇj †Kvb M¨vmwUi kZKiv cwigvY †ÿÎ we‡k‡l †ewk gvÎvq cwieZ©b nq? A. bvB‡Uªv‡Rb B. Aw·‡Rb C. Rjxq ev®ú D. Kve©b WvBA·vBW Ans C 02. ‡KvKv‡Kvjv, dv›Uv, ¯úªvBU BZ¨vw` †L‡Z UK jv‡M KviY GwmW wn‡m‡e G‡Z eZ©gvb _v‡K Ñ A. HCl B. mvBwUªK GwmW C. U¨vs D. Kve©b WvBA·vBW Ans D 03. ‡h RxevYyi (e¨vK‡Uwiqv) mvnv‡h¨ HNO3 GwmW †_‡K mivmwi N2(g) evZv‡m wegy³ nq Zv n‡jv Ñ A. bvB‡Uªv‡mvdvBs e¨vK‡Uwiqv B. bvB‡Uªv‡gvbvm e¨vK‡Uwiqv C. bvBwUªdvBs e¨vK‡Uwiqv D. wWbvBwUªdvBs e¨vK‡Uwiqv Ans B Why wWbvBwUªdvBs e¨vK‡Uwiqvi mvnv‡h¨ HNO3 GwmW ‡_‡K mivmwi N2(g) evZv‡m wegy³ nq| HNO3 wWbvBwUªdvBs e¨vK‡Uwiqv N2(g) myfvl gnxeyi weg‡j›`y Av‡bvqvi 01. M¨vm Av`k© n‡j wb‡Pi †Kvb †jLwPÎwU AbymiY Ki‡e? A. PV ebvg P †jLwPÎ PV A‡ÿi mgvšÍivj n‡e B. PV ebvg P †jLwPÎ P A‡ÿi mgvšÍivj n‡e C. P ebvg V †jLwPÎ V A‡ÿi mgvšÍivj n‡e D. V ebvg PV †jLwPÎ V A‡ÿi mgvšÍivj n‡e Ans B Why Av`k© M¨v‡mi †jLwPÎt

370 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 02. Av`k© M¨v‡mi AYy¸‡jvi g‡a¨ †KvbwU Av‡Q? A. AvKl©Y Av‡Q, wKš‧ weKl©Y †bB B. weKl©Y Av‡Q, wKš‧ AvKl©Y †bB C. AvKl©Y I weKl©Y †KvbUvB †bB D. AvKl©Y I weKl©Y DfqB Av‡Q Ans C Why M¨v‡mi AYymg~‡ni wb‡R‡`i g‡a¨ Ges AYy I iwÿZ M¨vmcv‡Îi †`qv‡ji g‡a¨ †Kv‡bv AvKl©Y ev weKl©Y ej Kvh©Kix _v‡K bv| 03. wb¤œwjwLZ¸‡jv wk‡íi M¨vmxq eR¨©, hv evqy `~l‡Yi Rb¨ `vqx? A. O2, SO2, CO2, N2, CPC B. SO2, CO2, NO2, CFC C. O2, N2, CFC D. N2, SO2, CO4 Ans B 04. ‡Kvb¸‡jv MÖxb nvDR M¨vm, hv evqygЇji ZvcgvÎv e„w×i Rb¨ `vqx? A. CH4, C2, CFC B. CFC, N2, CO2 C. N2O, CFC, CH4, CO2 D. CO2, N2, O2, CH4 Ans C Why g~jZ CO2, CH4, O3, CFC, N2O I Rjxq ev®ú‡K wMÖb nvDR M¨vm ejv nq| g~j MÖxb nvDR M¨vm wn‡m‡e CO2 ‡K aiv nq| 05. HCl I H3O + Gi g‡a¨ †KvbwU †Kvb ‡kÖwYi GwmW? A. H3O + AvYweK I HCl K¨vUvqwbK ‡kÖwYi B. H3O + A¨vbvqwbK I HCl K¨vUvqwbK ‡kÖwYi C. HCl AvYweK I H3O + K¨vUvqwbK ‡kÖwYi D. HCl A¨vbvqwbK I H3O + K¨vUvqwbK ‡kÖwYi Ans C 06. w¯
i ZvcgvÎvq M¨vm¸‡jvi eM©g~j Mo eM© †e‡Mi gvb we‡ePbv K‡i †h DaŸ©µgwU cvIqv hvq Zv n‡jv Ñ A. H2>N2>CO2 B. N2>H2>CO2 C. N2>CO2>H2 D. CO2>N2>H2 Ans A Why eM©g~j Mo eM© †eM‡K AvYweK f‡ii mv‡_ m¤úwK©Z Kiv hvq| C= M 3RT A_¨v©r, eM©g~j Mo eM©‡eM, AvYweK f‡ii eM©g~‡ji e¨¯ÍvbycvwZK| H2, N2, CO2 Gi AvYweK f‡ii µg nj H2 < N2 < CO2 AZGe eM©g~j Mo eM© †e‡Mi µg n‡e H2 > N2 > CO2 Rqbvj mv‡qb Iqvwn`y¾vgvb gvbœvb 01. evqygÐj‡K KqwU ¯Í‡i wef³ Kiv nq? A. PviwU B. `ywU C. cuvPwU D. wZbwU Ans A 02. Av`k© M¨v‡mi •ewkó¨ †KvbwU? A. AYymg~‡ni g‡a¨ AvKl©Y weKl©Y Av‡Q B. ev¯Í‡e †Kv‡bv M¨vm Av`k© M¨v‡mi b¨vq AvPiY K‡i bv C. cv‡Îi Zzjbvq M¨v‡mi AYyi AvqZb †ewk D. AYyi msNl© Aw¯
wZ¯
vcK Ans B 03. N~wY©S‡oi cÖavb Drm n‡”Q Ñ (i) Dò evqy (ii) Av`©ª evqy (iii) Rjxq ev®ú wb‡Pi †KvbwU mwVK? A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans A Why NywY©S‡oi Drm evqyi Zvc, Pvc NbZ¡ I Rjxq ev®ú wKš‧ NywY©S‡oi cÖavb Drm `ywU| h_v- Dò evqy I Av©`ª evqy| 04. CFC †h․‡M wK ai‡bi eÜb we`¨gvb? A. AvqwbK B. mg‡hvRx C. mwbœ‡ek mg‡hvRx D. avZe Ans B Why CFC mg‡hvRx eÜb wewkó ‡h․M| KviY CFC ‘C’ ‘Cl’ I F Øviv MwVZ hvi me¸‡jvB AavZz| AavZz mg~n mvaviYZ mg‡hvRx e܇bi gva¨‡g ci®úi hy³ nq| wjsKb Kwig byiæj 01. ‡Kvb ai‡bi `~lK cvwb‡Z `ªexf~Z Aw·‡Rb (DO) Gi cwigvY n«vm K‡i? A. A‣Re `~lK B. ‣Re `~lK C. ‡ZRw¯…q `~lK D. KYvRvZxq `~lK Ans B Why cvwb‡Z `ªexf~Z Aw·‡R‡bi cwigvY K‡g †M‡j `~l‡Yi gvÎv †e‡o hvq| KviY •Re `~lKmg~n e¨vK‡Uwiqvi cÖfv‡e G `ªexf~Z Aw·‡R‡bi mvnv‡h¨ RvwiZ nq| d‡j O2 Gi cwigvY n«vm cvq| 02. STP †Z GKwU cv‡Îi g‡a¨ 1mol Ar, 2 mol CO2, 3 mol O2 Ges 4mol N2 i‡q‡Q| wgkÖYwUi †gvU Pvc AcwiewZ©Z †i‡L 1mol O2 wgkÖYwU †_‡K mwi‡q wb‡j O2 Gi AvswkK Pvc Kxiƒc cwieZ©b NU‡e? A. cÖvq 26% n«vm cv‡e B. A‡a©K n‡e C. cÖvq 33% n«vm cv‡e D. cÖvq 4% n«vm cv‡e Ans A Why ‡gvU ‡gvj msL¨v = 1 + 2 + 3 + 4 = 10 PO2 = 3 10 miv‡bvi ci ‡gvU ‡gvj msL¨v 10 – 1 1mol O2 miv‡bvi ci ‡gvU ‡gvj msL¨v = 9; PO2 = 2 9 PO2 Gi AvswkK Pvc cwiewZ©Z nq 3 10 – 2 9 = 27–20 90 = 7 90 3 10 Gi AvswkK Pv‡ci cwieZ©b 7 90 ; 1 AvswkK Pvc cwiewZ©Z nq = 7 90 10 3 100 AvswkK Pvc cwiewZ©Z nq = 710100 903 = 26% 03. ‡Kvb ai‡bi `~lK cvwb‡Z `ªexf~Z Aw·‡Rb (DO) Gi cwigvY n«vm K‡i? A. A‣Re `~lK B. •Re `~lK C. †ZRw¯…q `~lK D. KYvRvZxq `~lK Ans B Why cvwb‡Z •Re c`v_© AwaK _vK‡j Aw·‡R‡bi cwigvY n«vm cvq hv gvQ I Ab¨vb¨ Rx‡ei Rb¨ ÿwZKi| Ref: Rqbyj/38 04. O2 hv ––––––––– AwZ‡e¸wb iwk¥ O + O, O3+OO2 + O2; G‡ÿ‡Î wewµqvØq Ñ (i) ÷ª¨v‡Uvwùqv‡i I‡Rvb ¯Í‡i N‡U (ii)wecixZµ‡g PµvKv‡i Pj‡Z _v‡K (iii) msNU‡bi d‡j ÷ª¨v‡Uvwùqv‡i I‡Rvb M¨v‡mi cwigvY e„w× cvq wb‡Pi †KvbwU mwVK A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans A 05. A2+B2 we`y¨r ––– ¶iY AB O2 –––B2 AB2 H2O ––– X gvwUi ––– ¶vi `ªve¨ bvB‡UªU jeY; †hLv‡b A I B `yBwU cÖZxKx †g․j| X †h․MwUi ms‡KZ †KvbwU? A. HNO3 B. HN3 C. HNO2 D. N2 Ans A Why N2 + O2 3000°C –––––––––– 2NO 2NO + O2 –––––– NO2 NO2 + 2H2O –––––– 4 HNO3 HNO3 + CaO –––––– Ca(NO3)2 + H2O HNO3 + MgO ––– Mg(NO3)2 + H2O cwiwkó 06. Av‡m©wbK (III) GbRvB‡gi †Kvb Kvh©Kix g~j‡Ki mv‡_ eÜb MVb K‡i GbRvB‡gi Kvh©µ‡g e¨vNvZ NUvq? A. –OH B. –SH C. –CHO D. –NH2 Ans B Why Av‡m©wbK (III) Gi welwµqv Av‡m©wbK (V) Gi welwµqv A‡cÿv `k¸Y †ewk| gvby‡li kix‡ii ‡cÖvwUb I GbRvB‡gi mv‡_ _v‡qvj eÜb MVb (–SH) K‡i GbRvB‡gi Kvh©µ‡g e¨NvZ NUvq| 07. cvwbi ¯
vqx LiZvi Rb¨ `vqx Avqb n‡jv Ñ (i) Mg2+ (ii) Ca2+ (iii) Fe2+ wb‡Pi †KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans A Why cvwbi ¯
vqx LiZvi Rb¨ `vqx Avqb¸‡jv nj Ca2+, Mg2+ , Al3+ Gi ‡K¬vivBW, mvj‡dU| A¯
vqx LiZvi Rb¨ `vqx Avqb nj Ca2+ , Mg2+, Al3+, Fe2+ Gi evBKve©‡bU|

CHEMISTRY PLUS cwi‡ek imvqb 371 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES P V T1 T2 T3 08. ‣Re c`v‡_©i Am¤ú~Y© Rvi‡Yi Rb¨ Drcbœ c`v_© n‡jv Ñ (i) CH4 (ii) H2S (iii) NH3 wb‡Pi †KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans C Why •Re c`v‡_©i Am¤ú~Y© Rvi‡Yi Rb¨ cvwb‡Z CH4, H2S, NH3 cÖf…wZ c`v_© Drcbœ nq| 09. As3+, As5+ A‡cÿv KZ ¸Y welv³? A. 2 B. 3 C. 5 D. 10 Ans D 10. EPA Gi gvb`‡Ð cvwb‡Z Av`k© TDS KZ? A. 100 ppm B. 200 ppm C. 300 ppm D. 500 ppm Ans D 11. wb‡Pi †KvbwUi `~l‡Y wgbv gvZv bvgK †ivM m„wó nq? A. Pb B. Hg C. Cd D. Cr Ans B 12. 4g H2 M¨v‡mi Ae¯
vi mgxKiY †KvbwU? A. V rb nRT V r a P 2 2 B. V 2b 2RT V 2a P 2 C. V 2b 2RT V 4a P 2 D. V b RT V 4a P Ans C 13. GwmW e„wói Kvi‡Y Rjvk‡qi cvwb‡Z wb‡Pi †Kvb Avqb m„wó nq hv gv‡Qi g„Zz¨i cÖavb KviY? A. Al3+ B. Fe2+ C. Fe3+ D. Ca2+ Ans A 14. wb‡Pi †KvbwU mev©‡cÿv `ye©j AbyeÜx ÿviK? A. CO3 2– B. SO4 2– C. NO3 – D. ClO4 – Ans D 15. Dfag©x cÖRvwZ n‡jv Ñ (i) H2O (ii) HCO3 – (iii) CH3COOH wb‡Pi †KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans A ¯^cb Kzgvi wg¯¿x 01. BU fvUvq Am¤ú~Y© `n‡b †Kvb †h․M Drcbœ nq? A. CO2 B. CO C. SO3 D. NH3 Ans B Why BUfvUvq Kve©‡bi Am¤ú~Y© `n‡b Kve©b g‡bv·vBW (CO) Drcbœ nq| O CO 2 1 C 2 02. ‡Kvb M¨v‡m e¨vc‡bi nvi Gi Ñ A. Nb‡Z¡i mgvbycvwZK B. AvYweK f‡ii mgvYycvwZK C. AvYweK f‡ii e‡M©i mgvbycvwZK D.AvYweK f‡ii eM©g~‡ji e¨¯ÍvbycvwZK Ans D 03. `yBwU M¨v‡mi Nb‡Z¡i AbycvZ 1:2 Ges Zv‡`i ZvcgvÎvi AbycvZ 2:1| M¨vm `yBwUi Pv‡ci AbycvZÑ A. 1:1 B. 1:2 C. 2:1 D. 4:1 Ans A Why d1T1 P1 = d2T2 P2 d1 T1 d2 T2 = P1 P2 P1 P2 = 1 2 2 1 = 1 P1 : P2 = 1:1 BKevj nviæb Iqvwn`y¾vgvb †gvkvid 01. GK AYywm Gd wm KqwU I‡Rvb AYy‡K aŸsm K‡i? A. 10wU B. 100wU C. 1000wU D. 10000wU Ans C wb‡Pi wPÎwU †`Lv Ges 2 I 3 bs cÖ‡kœi DËi `vIt 02. DÏxc‡Ki wPÎwU †Kvb m~·K mg_©b K‡i? A. e‡q‡ji m~Î B. Pvj©‡mi m~Î C. Wvë‡bi AvswkK Pvc m~Î D. MÖvnv‡gi e¨vcb m~Î Ans A 03. DÏxc‡K Ñ (i) ZvcgvÎvi µg Ñ T3 < T2 < T1 (ii) cÖ_g ‡iLvwU mev©waK Pvc cÖ`k©b K‡i (iii) cÖwZwU †iLvB mgZvcxq wb‡Pi †KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii Ans D 04. AvšÍtAvYweK AvKl©Y ej †ewk n‡j Ñ (i) ev®úPvc K‡g (ii) ùzUbvsK ev‡o (iii) Av`k© M¨vm nq wb‡Pi †KvbwU mwVK? A. i I ii B. ii I iii C. i I iii D. i, ii I iii Ans A 05. 1 wjUvi AvqZ‡bi 4wU cv‡Î 0C ZvcgvÎvq 4g K‡i wb‡Pi 4wU M¨vm ivLv Av‡Q| †KvbwU‡Z Pv‡ci cwigvY me‡P‡q †ewk n‡e? A. CH4 B. N2 C. O2 D. CO2 Ans A VVI DATA AT A GLANCE HSC PART †miv K‡jR cÖkœ I‡Rvb¯Íi ÿ‡qi Rb¨ `vqx CF2Cl [BMS] MÖxb nvDR cÖfv‡e CO2 M¨vmwUi cÖfve †ewk | [NI] cvwb‡Z AbyRxe †eu‡P _vKvi Rb¨ (DO) cwigvY (4–8)ppm [AKMC] cvwbi weï×Zv cwigv‡ci gvb`Ð DO, BOD I P H [JGGC] CO2 Kvi‡b m„ó GwmW e„wó cwi‡e‡ki †Zgb †Kv‡bv ÿwZ nq bv| [ISC] w¯
i ZvcgvÎvq r.m.s †e‡Mi mwVK µg H2>N2>CO2 [SJ] cvwb‡Z COD Gi gvb BOD Gi gvb A‡cÿv †ewk | [IPS] ev¯Íe M¨vm¸‡jv mKj ZvcgvÎv I Pv‡c e‡qj I Pvj‡m©i m~Î †g‡b P‡j bv| [PGC] cvwbi TDS Kgv‡bvi Dcvq n‡jv Deionization cÖwµqvq Kve©b wdëvi I cvZb [DC] NywY©So m„wó‡Z Acwinvh© kZ©mg~n nj Av`ª© mvgyw`ªK evqy I wb¤œPvc| [RUMC] NH3, CO2, O2 I H2 Gi g‡a¨ e¨vc‡bi nvi H2 Gi †ewk| [BMC gviK¨vcUb `~lKwU †c‡Uªvwjqvg †kvabvMvi, Pvgov wkí, KvMR wkí I †c‡Uªwjqvg wkí n‡Z wbM©Z nq| [MH] eRªcv‡Zi mgq wµqvkxj nq N2 I O2 M¨vm [CUL] SO2, CO2, NO2, CFC wk‡íi M¨vmxq eR¨©, hv evqy `~l‡Yi Rb¨ `vqx| [HAH] ‡Kv‡bv ¯
v‡bi AvenvIqv I Rjevqy‡K wbqš¿Y K‡i Uª‡cvwùqvi Gi evqygÐj [MGC] cvwbi g‡a¨ `~lK c`v_© wnmv‡e _v‡K •Re †hvM I A‣Re eR¨© c`v_©| [KB] Cr Gi Cr3+ Ae¯
v kix‡i •Zix K‡i Bbmywjb I †cÖvwUb| [NDC] NTP †Z GKwU Av`k© M¨v‡mi ms‡KvPbkxjZv ¸Yv¼ (z) Gi gvb 1.0 [MWC] Dw™¢` KZ…©K CO2 †kvlY mv‡jvKms‡kølY cÖwµqvi gva¨‡g N‡U| [DRMC] NywY©So n‡jB †mLv‡b R‡jv”Q¡v‡mi m„wó nq| [RJMC] Cr3+ `~l‡Yi d‡j RBC †Z †j․n Fe2+ †kvl‡Y evav cvq| [NDC] ï®‥ H2 M¨v‡mi Pvc n‡jv Ñ101.750kPa [DC]

372 cwi‡ek imvqb CHEMISTRY PLUS ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES MCQ CONCEPT TEST WRITTEN 01. IPCC Gi M‡elYvi djvdj Abymv‡i AvMvgx 2150 mv‡j c„w_exi ZvcgvÎv KZ e„w× cv‡e? A. 1.8% B. 2.8% C. 3.8 D. 4.8 02. wewfbœ wk‡í Rxevk¥ R¡vjvwbi `n‡bi d‡j Kx Drcbœ nq? A. NO B. NO2 C. CO D. CO2 03. GwmW e„wó m„wó‡Z me †_‡K †ewk f~wgKv iv‡LA. H2SO4 B. HNO3 C. HCl D. H2CO3 04. wMÖb nvDR cÖfv‡ei d‡j ZvcgvÎv e„w× ‡c‡j gvbyl ‡Kvb ‡iv‡M AvµvšÍ ‡ewk n‡e? A. nvucvwb, GjvwR©, Pg©‡ivM B. nvU© A¨vUvK, ü`‡ivM C. Wvqv‡ewUm, A‡_©vc¨vwWK D. K¨vÝvi, wKWwb ‡ivM 05. kix‡i Cd Gi cwigvY †e‡o ‡M‡j DcmM© †`Lv †`q bv - A. nvBcvi‡Ubkb B. A‡š¿i Amyweav C. Møy‡Kv‡mvwiqv D.Anaemia 06. Av‡m©wb‡Ki welwµqvq AvµvšÍ e¨w³i n‡Z cv‡ii) evBbvBwUi, d¨vwibRvBwUm ii) m¨vwibRvBwUm, UªvwKIeª¼vBwUm iii) wm‡ivwmm wbD‡ivc¨v_x wb‡Pi ‡KvbwU mwVK? A. i I ii B. i I iii C. ii I iii D. i, ii I iii 07. cvwb‡Z DO Gi Am¤ú~Y© Rvi‡Yi d‡j D™¢e N‡U bv - A. wg‡_b (CH4) B. dmwdb (PH3) C. nvB‡Wªv‡Rb mvjdvBW (H2S) D. None 08. eªb‡÷W-jvDixi gZev` Abymv‡i- wb‡Pi ‡KvbwU mwVK? A. GwmW ‡cÖvUb `vZv B. ÿviK ‡cÖvUb MÖnxZv C. RviK ‡cÖvUb MÖnxZv D. ‡cÖvUbxq ZË¡ bv‡g cwiwPZ 09. 28 MÖvg bvB‡Uªv‡Rb Ges 142g †K¬vwib M¨v‡mi wgkª‡Yi †gvU Pvc 12atm n‡j H wgkÖ‡Y bvB‡Uªv‡Rb M¨v‡mi AvswkK Pvc KZ? A. 8 atm B. 4 atm C. 6 atm D. 2 atm 10. 27C ZvcgvÎvq GKwU M¨v‡mi AvqZb 10 m3 | Pvc w¯
i †i‡L ZvcgvÎv KZ C e„w× Ki‡j AvqZb 12 m3 n‡e? A. 60C B. 50C C. 80C D. 40C 11. GKwU wbw`©ó ZvcgvÎv I Pv‡c NH3 M¨v‡mi e¨vcb nvi 10 2 m 3 /s n‡j D³ Ae¯
vq H2S M¨v‡mi e¨vcb nvi KZ m 3 /s? A. 5 2 B. 20 C. 10 D. 20 2 12. Acid Rain Gi Rb¨ `vqx bq? A. SO2 B. NO2 C. CO2 D. N2O 13. wkí‡ÿ‡Î NH3 †_‡K HNO3 •Zwi cÖwµqv‡K e‡jA. Solvay Process B.Haber Process C. Ostwald Process D. Contact Process 14. wb‡gœi †Kvb M¨vmwU Av`k© M¨v‡mi ag© †_‡K me‡P‡q †ewk wePz¨Z? A. HCl B. He C. CH4 D. N2 15. wb‡Pi †Kvb †jLwPÎwU e‡q‡ji m~·K mg_©b K‡i? A. B. C. D. OMR SHEET 01. A B C D 06. A B C D 11. A B C D 02. A B C D 07. A B C D 12. A B C D 03. A B C D 08. A B C D 13. A B C D 04. A B C D 09. A B C D 14. A B C D 05. A B C D 10. A B C D 15. A B C D cÖkœ-16 : M¨vm aªæeK ÔRÕ Gi Zvrch© wjL| DËi : ............................................................................................ cÖkœ-17: ÔwgbvgvZvÕ †ivM ej‡Z Kx †evS? DËi : ............................................................................................ cÖkœ-18. H2PO4 – -A¤ø ÿviK Dfq wn‡m‡e KvR K‡i †Kb? DËi : ............................................................................................ cÖkœ-19. LPG M¨v‡m gviK¨vcUvb †hvM Kiv nq †Kb? DËi : ............................................................................................ cÖkœ-20. A¨vgvMv †iLv Kx? DËi : ............................................................................................ cÖkœ-21. Av`k© M¨v‡mi Ae¯
vi mgxKiY ej‡Z Kx †evS? DËi : ............................................................................................ cÖkœ-22. ¯
vqx LiZv I A¯
vqx LiZvi g‡a¨ 2wU cv_©K¨ wjL| DËi : ............................................................................................ cÖkœ-23. GKwU wUDeI‡q‡ji cvwbi LiZv 200 ppm ej‡Z Kx †evS? DËi : ............................................................................................ cÖkœ-24. MÖxb nvDR cÖfve m„wó‡Z CO2 & CH4 Gi g‡a¨ †KvbwUi AYycÖwZ Ae`vb me©v‡cÿv †ewk? DËi : ............................................................................................ cÖkœ-25. Ryj _gmb cÖfv‡e ZvcgvÎv n«vm cvq †Kb? DËi : ............................................................................................ MCQ ANSWER ANALYSIS WRITTEN cÖkœ bs DËi e¨vL¨v 01 C 2013 mv‡j Intergovernmental Panel of Climate Change (IPCC) Gi M‡elYvi djvd‡j ‡`Lv hvq evqygЇj CO2 Gi cwigvY eQ‡i 0.3-0.4% nv‡i evo‡Q| hw` G nv‡i CO2 Gi cwigvY e„w× cvq Z‡e AvMvgx 2150 mvj bvMv` c„w_exi ZvcgvÎv cÖvq 3.8°C e„w× cv‡e| ZvcgvÎv e„w×i d‡j mvB‡K¬vb, mycvi mvB‡K¬vb, U‡b©‡Wv, mybvwgi g‡Zv So¸‡jv AviI weaŸsmx n‡q DV‡e| 02 B Uª‡cvwùqv‡i I‡Rvb M¨vm Ae¯
vb K‡i| ‡gvUi BwÄb, Zvcwe`y¨r ‡K›`ª I wewfbœ wk‡í Rxevk¥ R¡vjvwbi `n‡bi d‡j NO2 Drcbœ nq| Drcbœ NO2 evqygЇj Dcw¯
Z nvB‡WªvKve©bmg~n I Aw·‡R‡bi mv‡_ wewµqv K‡i O3 M¨v‡mi DrcwË NUvq| 03 A GwmW e„wó m„wó‡Z me †_‡K †ewk f~wgKv iv‡L H2SO4(60–65%), Zvici HNO3(30–35%) me‡P‡q Kg f~wgKv iv‡L HCl. PV P logP logV logP logV V 1 P

CHEMISTRY PLUS cwi‡ek imvqb 373 ASPECT SERIES cvV¨eB‡K mnR Kivi cÖqvm ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES ASPECT SERIES 04 A CONCEPT : 8 Item-02 05 D gvby‡li kix‡i Cd Gi cwigvY †e‡o †M‡j nvBcvi‡Ubkb, A‡š¿i Amyweav, Møy‡Kvwmwiqv, nvBcviK¨vjwmDwiqv, wKWwb‡Z cv_i m„wó cÖf…wZ DcmM© †`Lv †`q| 06 D Av‡m©wb‡Ki welwµqvq AvµvšÍ e¨w³i †`‡n evBbvBwUm, d¨vwibRvBwUm, m¨vwibRvBwUm, UªvwKIeª¼vBwUm, wm‡ivwmm wbD‡ivc¨v_x, Z¡K msµvšÍ Av‡m©wb‡Kvwmm †iv‡Mi g‡Zv KwVb KwVb me e¨vwai m„wó nq| 07 D cvwb‡Z DO Gi cwigvY K‡g †M‡j RviY Kv‡h© cÖwZeÜKZv m„wó nIqvq cvwbi `~lY gvÎv µgvš^‡q †e‡o hvq| Am¤ú~Y© Rvi‡Yi d‡j CH4, PH3, H2S A¨vwgb RvZxq †h․‡Mi D™¢e N‡U| d‡j cvwb‡Z `yM©‡Üi m„wó nq| 08 D GwmW †cÖvUb `vZv Ges ÿviK †cÖvUb MÖnxZv| Giv Avavb wbi‡cÿ †h․M A_ev abvZ¥K ev FYvZ¥K Avavbwewkó g~jK n‡Z cv‡i| 09 B AvswkK Pvc= †gvj fMœvsk × †gvU Pvc 12 4atm 1 2 1 P 2 N 10 A Pvj©‡mi m~Îvbymv‡i, 2 2 1 1 T V T V 1 1 2 2 V T V T 10 300 12 T2 T2 = 360 K cÖ‡qvRbxq ZvcgvÎv, T = (360 300)C = 60C 11 C 17 34 M M r r 1 2 2 1 r2 10 12 C CO2 Acid Rain Gi Rb¨ `vqx bq KviY CO2 `~e©j H2CO3 GwmW •Zix K‡i hv pH cwieZ©b Ki‡Z cv‡i bv| 13 C AmIqvì c×wZ‡Z wkí †ÿ‡Î NH3 †_‡K HNO3 •Zwi Kiv nq| 14 A Av`k© M¨v‡mi wePy¨wZi KwZcq Kvi‡bi GKwU n‡”Q AvYweK fi| wbw®…q M¨vm e¨ZxZ AvYweK fi hZ †ewk n‡e Av`k© M¨vm †_‡K wePz¨wZ ZZ †ewk n‡e| HCl Gi AvYweK fi = 1+ 35.5=36.5;CH4 Gi AvYweK fi = 12+4=16; N2 Gi AvYweK fi = 28 myZivs HCl Gi wePz¨wZ †ewk n‡e| 15 A+C e‡q‡ji m~Îg‡Z, V Ges 1 P ci¯ú‡ii mgvbycvwZK| ZvB g~jwe›`yMvgx mij‡iLv n‡e| 16 M¨vm aªæeK ÔRÕ Gi gvÎv ÔRÕ = KvR wWwMÖ-1 †gvj-1| Pvc w¯
i †i‡L 1.0 †gvj Av`k© M¨v‡mi ZvcgvÎv 1K evov‡j M¨v‡mi AvqZb e„w×RwbZ †h cwigvY KvR m¤úvw`Z nq Zv M¨vm aªæeK ÔRÕ Gi mgvb| GUvB M¨vm aªæeK ÔRÕ Gi Zvrch©| 17 cvwb‡Z cvi` wgwkÖZ _vK‡j cvwbi wewfbœ AYyRxe Øviv cvi` (Hg) wg‡_‡bi mv‡_ wewµqv K‡i wg_vBj gvK©vwi bvgK welv³ c`v_© m„wó K‡i| wg_vBj gvK©vix gv‡Qi gva¨‡g kix‡i cÖ‡ek K‡i †h †iv‡Mi m„wó K‡i ZvB ÔwgbvgvZvÕ †ivM| 18 H2PO4 – AvqbwU OH– Avqb‡K †cÖvUb `vb K‡i A¤øiƒ‡c Ges H2O †_‡K †cÖvUb MÖnY K‡i ÿviKiƒ‡c wµqv K‡i| ZvB H2PO4 A¤ø ÿviK Dfq wn‡m‡e KvR K‡i| 19 LPG M¨vm MÜnxb nIqvq wmwjÛvi wjK n‡”Q wKbv †evSv hvq bv| wKšÍy gviK¨vcUvb Zxeª MÜhy³| GwU LPG M¨v‡mi mv‡_ hy³ _vK‡j wmwjÛvi wjK n‡j Gi MÜ †_‡K †evSv hvq| ZvB LPG M¨v‡m gviK¨vcUvb †hvM Kiv nq| 20 w¯
i ZvcgvÎvq ev¯Íe M¨vmmg~‡ni PV Gi gv‡bi wecix‡Z P Gi †jLwPÎ A¼b Ki‡j †h eµ †iLv cvIqv hvq, †mB †iLv¸‡jv‡K A¨vgvMv †iLv e‡j| 21 M¨vm m~Îmg~‡ni mgš^‡q cÖwZwôZ PV = nRT mgxKiY‡K Av`k© M¨v‡mi Ae¯
vi mgxKiY ejv nq| 22 CONCEPT-12 Item-02 23 GKwU wUDeI‡q‡ji `k jÿ fv‡Mi cvwb‡Z we`¨gvb LiZv m„wóKvix c`v_© H wUDeI‡q‡ji 200 fvM cvwb‡Z we`¨gvb CaCO3 Gi IR‡bi mgvb| 24 MÖxbnvDR cÖfve m„wó‡Z AYycÖwZ Ae`vb CH4 A‡cÿv CO2 Gi †ewk| cÖwZ AYy CO2 Gi Zvc AvU‡K †`Iqvi ÿgZv cÖwZ AYy CH4 Gi Zyjbvq cÖvq 25 ¸Y †ewk| 25 267 c„ôvq [CU 2011-12] `ªóe¨| cÖkœB hLb cÖkœ nq †kl `„wó KviY AbymÜvb cÖ‡qvRb bq w¯
i Pv‡c ZvcgvÎv evov‡j M¨v‡mi AvqZ‡bi mv‡_ mgfv‡e cwieZ©b NU‡e †Kb? †gvjvi M¨vm aªæeK R Gi gvb wewfbœ GK‡K wfbœ †Kb? GKwU wbw`©ó DòZvq H2 I CO2 AYyi MwZkw³ wfbœ †Kb? ‡Kvb ev¯Íe M¨v‡mi ms‡KvPbkxjZv ¸Yv‡¼i (Z) gvb KLb 1 Gi AwaK nq bv †Kb? CO GKwU welv³ M¨vm, wKš‧ CO2 welv³ bq †Kb? ÷ª¨v‡Uvwùqv‡ii I‡Rvb DcKvix wKš‧ †Uªv‡cv‡ùvwiK I‡Rvb Avgv‡`i Rb¨ ÿwZKviK †Kb? mKj Avi‡nwbqvm GwmW nj eªb‡÷W GwmW wKš‧ wecixZ e³e¨wU mwVK bvI n‡Z cv‡i †Kb? me eªb‡÷W ÿviK Avi‡nwbqvm ÿviK bq †Kb? me jyBm ÿviK eªb‡÷W ÿviK †Kb? H + GKwU jyBm GwmW †Kb? eR¨© cvwbi •ewkó¨ mvaviYZ cvwb A‡cÿv wfbœ †Kb? evqygЇji mKj ¯
v‡b Av‡jvK ivmvqwbK wewµqv mgvb bq †Kb? wPšÍv Ki †`wL? dzUej‡K cv¤ú Kivi mgq Zvi †fZ‡ii M¨v‡mi Pvc I AvqZb `y‡UvB ev‡o| GB NUbv wK e‡qj m~‡Îi we‡ivax| AvZ¥mgv‡jvPbv Avcbv‡K weï× K‡i Ac‡ii mgv‡jvPbv Avcbv‡K `~wlZ K‡i| .......†jLK