Tiêu đề 1. Engg. Che. MCQ Practice Sheet (2nd) With Sove_Solayman_(25-12-23).pdf ✅

cwi‡ek imvqb  Engineering Practice Sheet 1 cÖ_g Aa ̈vq cwi‡ek imvqb Environment Chemistry ACS Chemistry Department Gi g‡bvbxZ eûwbe©vPwb cÖkœmg~n Type-1: M ̈v‡mi m~Îmg~n, M ̈v‡mi mgš^q m~Î, Av`k© M ̈vm mgxKiY 1. 27C ZvcgvÎvq 320 atm Pv‡c 1 wU cv‡Î O2 M ̈vm Av‡Q| H M ̈v‡mi Pvc 10% evov‡Z cvÎwU‡K KZ ZvcgvÎvq ivLv‡Z n‡e? 57C 29.7C 1.86C 18.6C DËi: 57C e ̈vL ̈v: Pvc 10% evov‡bv A_©vr, P2 = 320 + 320  10 100 P1 P2 = T1 T2  320 320 + 320  10 100 = 300 T2  T2 = 57C 2. 100C ZvcgvÎvq Ges 1.0526 atm Pv‡c CO2 M ̈v‡mi NbZ¡ KZ? 0.0129 gL–1 0.0566 gL–1 1.513 gL–1 1.36 gL–1 DËi: 1.513 gL–1 e ̈vL ̈v: d = PM RT = 1.0526  44 0.0821  373 = 1.51239 gL–1 3. 27C ZvcgvÎvq 18g O2, 4L ̄’vb `Lj Ki‡j Pvc KZ? 350.38 atm 3.46 kPa 3.46 atm 350.83 Pa DËi: 3.46 atm e ̈vL ̈v: PV = nRT  P = 18  0.0821   = 3.46 atm 4. mgZvc †iLv ev m‡gvò †iLv ev AvB‡mv_vg© Kx? M ̈v‡mi Pvc ebvg AvqZb †jLwPÎ ZvcgvÎv ebvg AvqZb †jLwPÎ ZvcgvÎv ebvg M ̈v‡mi Pvc †jLwPÎ †Kv‡bvwUB bq DËi: M ̈v‡mi Pvc ebvg AvqZb †jLwPÎ 5. w ̄’i DòZvq †Kvb M ̈v‡mi Pvc 4 ̧Y Ki‡j NbZ¡- Pvi ̧Y n«vm cv‡e Pvi ̧Y e„w× cv‡e wZb ̧Y e„w× cv‡e wØ ̧Y n«vm cv‡e DËi: wZb ̧Y e„w× cv‡e e ̈vL ̈v: d2 d1 = P2 P1 d  P; Pvc 4 ̧Y n‡j NbZ¡ 4 ̧Y n‡e|  NbZ¡ e„w× cv‡e = (4 – 1) = 3 ̧Y| 6. 20C ZvcgvÎvq 80 kPa Pv‡c GKwU wbw`©ó cwigvY M ̈v‡mi AvqZb 0.25 m3 | 20C ZvcgvÎvq D3 M ̈v‡mi AvqZb 0.3 m 3 n‡j Pvc KZ n‡e? 66.67 Nm–2 667 kPa 66.67 kPa 66.67 atm DËi: 66.67 kPa e ̈vL ̈v: P1V1 T1 = P2V2 T2  P2 = 80  0.25  293 293  0.3 kPa = 66.67 kPa 7. Av`©k DòZv I Pv‡c †Kvb M ̈v‡mi NbZ¡ 22 kgm–3 | Pvc w ̄’i †i‡L ZvcgvÎv 11C n«vm Ki‡j M ̈vmwUi NbZ¡ KZ n‡e? 21.11 kgm–3 22.63 kgm–3 22.92 kgm–3 †KvbwUB bq DËi: 22.92 kgm–3 e ̈vL ̈v: d1T1 = d2T2  d2 = d1T1 T2 = 22  273 262 kgm–3 = 22.92 kgm–3 8. V1 V2 V3 T P wb‡Pi †KvbwU mwVK? V1 > V2 >V3 V1 = V2 = V3 V3 > V2 >V1 †KvbwUB bq DËi: V3 > V2 >V1 e ̈vL ̈v: T fixed K‡i w`‡j, P  1 V P evo‡j V Kg‡e| V3 > V2 > V1 T V2 P T V3 6 V1 6
2  Chemistry 2 nd Paper Chapter- 1 9. STP †Z CO2 22.4L M ̈v‡m KqwU †cÖvUb Av‡Q? 1.325  1025 8.432  1024 6.023  1023 6.99  1023 DËi: 1.325  1025 e ̈vL ̈v: †h‡nZz CO2 Zwor wbi‡cÿ, ZvB hZ ̧‡jv †cÖvUb Av‡Q ZZ ̧‡jv electron I Av‡Q| 1 mol CO2 = 22.42 CO2 GLb 1 mol CO2 †Z †gvU 22 mol ev (6 + 8 wU †cÖvUb Av‡Q|  †cÖvcb msL ̈v = 22  6.023  1023  1.3  1025 wU 10. w ̄’i ZvcgvÎvq M ̈v‡mi Pvc ebvg AvqZ‡bi †jLwPÎwU wKiƒc? cive„Ë Awae„Ë Dce„Ë e„Ë DËi: Awae„Ë 11. SI GK‡K †evëRg ̈vb aaæe‡Ki gvb KZ? 1.38  10–22 J K–1molecule–1 1.38  10–23 L atm K1molecule–1 1.38  10–25 J K–1molecule–1 1.38  10–23 J K–1molecule–1 DËi: 1.38  10–23 J K–1molecule–1 12. 0.5 gm Zij‡K m¤ú~Y©iƒ‡c ev®úxf~Z Kivq Zv 150C ZvcgvÎvq I 0.99 atm Pv‡c mL ̄’vb `Lj K‡i| Zij c`v_©wUi AvYweK fi KZ? 55.8 53.9 48.7 64 DËi: 53.9 e ̈vL ̈v: M = WRT PV = 0.5  0.0821    53.9 13. 27C ZvcgvÎvq 1 atm Pv‡c 25 g SO2 M ̈v‡mi AvqZb KZ? 62.98 L 973.82 L 9.61 L 12.81 L DËi: 9.61 L e ̈vL ̈v: PV = nRT  V = nRT P = 25 64  0.0821  273 1 = 9.6211 Liten 14. 80 cm3 M ̈v‡mi AvqZb 20% ewa©Z Kiv n‡jv wKš‘ Pv‡ci †Kvb cwieZ©b n‡jv bv| cÖviw¤¢K ZvcgvÎv 25C n‡j M ̈vmwU KZ ZvcgvÎvq DËß Kiv n‡qwQj? [KUET 15-16] 357.6C 30.0C 84.6C 60.0C 76.4C DËi: 84.6C e ̈vL ̈v: Avgiv Rvwb, V1 T1 = V1 T2  T2 = V2 V1 × T1 = 1.2 × 298 K = 357.6 K = 84.6 C [P Constant] 15. At a constant pressure the volume of a definite mas of a gas at 100C is 200 cm3 . The volume of that gas at the same pressure and 0C will be- [IUT 14-15] 146.384 cm3 22.4 × 103 cm3 4.46 × 10–3 L 8.92 × 10–3 L 76.4C DËi: 146.384 cm3 e ̈vL ̈v: V1 T1 = V2 T2  V2 = V1 T2 × T2 = 200 100 + 273 × 273 = 146.38 cm3 16. 11g CO2 G KqwU AYy Av‡Q? [BUTEX 13-14] 6.023 ×1023 5.52 ×1023 1.5 ×1023 1.67 ×1023 DËi: 1.5 ×1023 e ̈vL ̈v: AYy = 44 11 × NA = 1.506 ×1023 wU 17. cÖgvY ZvcgvÎv I Pv‡c wb‡Pi †Kvb M ̈vmwUi †gvjvi AvqZb me‡P‡q †ewk? [BUET 12-13] H2 He NItrogen †KvbwUB bq DËi: †KvbwUB bq e ̈vL ̈v: A ̈v‡fv‡M‡Wav cÖKí Abymv‡i GKB ZvcgvÎv I Pv‡c me M ̈v‡mi †gvjvi AvqZb mgvb| 18. V = K 1 P mgxKiY Øviv †Kvb m~·K cÖKvk Kiv nq? [BUET 10-11] A ̈v‡fvMv‡Wavi m~Î †M-jymv‡Ki m~Î Wvë‡bi m~Î None of the above DËi: None of the above e ̈vL ̈v: V = K 1 P mgxKiYwU e‡q‡ji m~·K cÖKvk K‡i 19. wb‡Pi †KvbwU Pv‡ci GKK bq? [BUET 10-11] Nm–2 atm Litre – atm Torr DËi: Litre – atm 20. cÖgvY ZvcgvÎv I Pv‡c nvB‡Wav‡Rb M ̈vm aviYKvix GKwU †ejy‡bi AvqZb 3.22 × 10–6 cm3 . D3 †ejy‡b KZwU nvB‡Wav‡Rb M ̈v‡mi AYy Av‡Q? [KUET 10-11] 8.6580 × 1012 8.6080 × 1012 8.6580 × 1013 8.6580 × 1011 DËi: 8.6580 × 1013 e ̈vL ̈v: n = 3.22 × 10–6 22400 × 6.02 ×1023 = 8.65 ×1013