Tiêu đề 3. Che. Varsity Practice Sheet (1st) With Solve.pdf ✅

†g.‡ji ch©vqe„Ë ag© I ivmvqwbK eÜb  Varsity Practice Sheet.......................................................................................... 53 MCQ weMZ mv‡j DU-G Avmv cÖkœvejx 1. Al2Cl6 AYywU‡Z mg‡hvRx I mwbœ‡ek mg‡hvRx e܇bi msL ̈v h_vμ‡g KqwU? [DU 23-24, 18-19] 6, 2 6, 1 8, 0 7, 0 DËi: 6, 2 e ̈vL ̈v: C l Cl Cl Cl Al 79 Al 118 Cl Cl Al2Cl6 Gi Dchy©3 MVb †_‡K †`Lv hvq 6wU mg‡hvRx eÜb I 2wU mwbœ‡ek mg‡hvRx eÜb Av‡Q| 2. CH2 = CH – CH = CH2 Gi Kve©b cigvYymg~‡ni msKiY Kx ai‡bi? [DU 22-23] sp2 , sp sp, sp3 sp2 sp, sp2 , sp3 DËi: sp2 e ̈vL ̈v:  Kve©b-Kve©b GKK e܇b sp3 msKiY N‡U  Kve©b-Kve©b wØ-e܇b sp2 msKiY N‡U  Kve©b-Kve©b wÎ-e܇b sp msKiY N‡U H – C = CH – CH = C – H | | H H sp2 sp2 sp2 sp2 GB †h.‡M cÖ‡Z ̈KwU Kve©‡b wØ-eÜb we` ̈gvb _vKvq sp2 msKiY we` ̈gvb| 3. wb‡Pi †Kvb †h.‡M me©v‡cÿv kw3kvjx nvB‡Wav‡Rb eÜb i‡q‡Q? [DU 22-23] H2O H2S HF NH3 DËi: HF e ̈vL ̈v: AwaK Zwor FYvZ¥K I †QvU AvKv‡ii N, O, F Gi mv‡_ H cigvYy H-eÜb MVb Ki‡Z cv‡i| F Gi Zwor FYvZ¥KZv O A‡cÿv AwaK| 1wU HF AYy 2wU HF AYy Gi mv‡_ eÜb MVb K‡i| ZvB HF G me©v‡cÿv kw3kvjx nvB‡Wav‡Rb eÜb i‡q‡Q| 4. C, O, N Ges F Gi Zwor FYvZ¥KZvi mwVK μg †KvbwU? [DU 21-22] F > O > N > C N > F > O > C O > F > C > N F > N > O > C DËi: F > O > N > C e ̈vL ̈v: GKB ch©v‡qi evg †_‡K Wv‡b †M‡j Zwor FYvZ¥KZvi gvb e„w× cvq| 5. †mvwWqvg avZz msiÿ‡Yi Rb ̈ wb‡Pi †KvbwU Dchy3? [DU 21-22] NaCl(aq) HCl(aq) Ethanol Hexane DËi: Hexane e ̈vL ̈v: †mvwWqvg A‡bK mwμq avZz| G‡K evZv‡m ev cvwb‡Z msiÿY Kiv hvq bv| cvwbi mv‡_ †mvwWqvg avZy mivmwi we‡ùviY NUvq| ZvB †mvwWqvg avZz‡K wbw®...q c`v_© †K‡ivwmb, †n‡·b Gi g‡a ̈ msiÿY Kiv nq| †mvwWqvg avZz‡K evZv‡m ivL‡j, 4Na + O2  2Na2O Na2O + CO2  Na2CO3 †mvwWqvg avZz‡K cvwb‡Z ivL‡j, 2Na + 2H2O  2NaOH + H2 + Zvc Zv‡cvrcv`x wewμqv nIqvq Drcbœ H2 M ̈v‡m Av ̧b a‡i hvq| 6. †Kvb †h.MwU mij‣iwLK bq? [DU 21-22] CO2 H2S C2H2 O2 DËi: H2S e ̈vL ̈v: H2S G nvBweaW AiweUv‡ji msL ̈v, X = 1 2 (6 + 2 – 0 + 0) = 4  sp3 msKiY we` ̈gvb I eÜb †KvY 109.5| ZvB †h.MwU mij‣iwLK bq| 7. MÖvdvB‡U †Kvb ai‡bi msKiY we` ̈gvb? [DU 21-22, 01-02; RU 18-19, 15-16] sp3 sp2 sp sp2 d DËi: sp2 e ̈vL ̈v: MÖvdvBU Kve©‡bi GKwU iƒc‡f`| MÖvdvB‡U sp2 msKiY Ges nxi‡K sp3 msKiY we` ̈gvb| 8. nvB‡Wavwbqvg Avq‡b †Kvb †Kvb eÜb we` ̈gvb? [DU 20-21] AvqwbK I mg‡hvRx eÜb AvqwbK I mwbœ‡ek eÜb mg‡hvRx I mwbœ‡ek eÜb AvqwbK I nvB‡Wav‡Rb eÜb DËi: mg‡hvRx I mwbœ‡ek eÜb e ̈vL ̈v: nvB‡Wavwbqvg Avq‡bi ms‡KZ H3O + O .. H H mwbœ‡ek mg‡hvRx eÜb mg‡hvRx eÜb H +
2 ....................................................................................................................................  Chemistry 1st Paper Chapter-3 9. AóK m¤úamviY Gi D`vniY †KvbwU? [DU 20-21] BeCl2 PCl5 BCl3 Cl2 DËi: PCl5 e ̈vL ̈v: hw` †K›`axq cigvYyi me©‡kl kw3 ͇̄i 8wUi †ewk B‡jKUab _v‡K, Zv‡K AóK m¤úamviY e‡j| D`vniY: PCl5, SF4, SF6, IF7, ICl3, IBr3, ClF3 cÖf...wZ| PCl5 Gi P Gi me‡P‡q evB‡ii kw3 ͇̄ii B‡jKUab msL ̈v 5 Ges GK‡hvRx cigvYy Cl Av‡Q 5wU| A_©vr †h.MwUi me‡P‡q evB‡ii kw3 ͇̄i me©‡gvU B‡jKUab 10wU| P . Cl Cl . Cl Cl Cl . .× ×. × × × PCl5 G P Gi Pviw`‡K 10wU B‡jKUab 10. Kve©b †g.j nxiK I MÖvdvBU-G wfbœiƒc| G‡`i †ÿ‡Î †Kvb Dw3wU mZ ̈ bq? [DU 19-20] Df‡qB Kve©b †g.j Øviv MwVZ nxiK I MÖvdvB‡U Kve©b cigvYyi msKivqb n‡jv h_vμ‡g sp3 I sp2 Df‡qi we`y ̈r cwievwnZv wfbœ Df‡qi `nb Zvc GKB DËi: Df‡qi `nb Zvc GKB e ̈vL ̈v: nxiK I MÖvdvB‡U `nb Zvc Avjv`v| MÖvdvB‡Ui j ̈vwUm kw3 Kg nIqvi d‡j Gi `nb Zvc Kg| nxi‡K sp3 msKiY we` ̈gvb _vKvq G‡Z PZz ̄ÍjKxq MVb †`Lv hvq ZvB Gi j ̈vwUm kw3I †ewk nq| GRb ̈ nxi‡K `nb Zvc †ewk nq| 11. †KvbwU A¤øxq Rjxq `aeY •Zwi K‡i? [DU 19-20] Na2O ZnO Al2O3 CO2 DËi: CO2 e ̈vL ̈v: †h †Kv‡bv ch©v‡qi Wvbw`‡K AavZz Ae ̄ vb K‡i| AavZzi A·vBW Rjxq `ae‡Y H + `vb K‡i| ZvB AavZzi A·vBW A¤øxq Rjxq `aeY •Zwi K‡i| CO2 + H2O  H2CO3 H2CO3  2H+ + CO2– 3 12. wb‡Pi †Kvb †h.MwUi mg‡hvRx AvPiY me‡P‡q †ewk? [DU 19-20; BU 14-15] AlBr3 MgO MgCl AlCl3 DËi: AlBr3 e ̈vL ̈v: dvRv‡bi bxwZ Abymv‡i, †hme †h.‡Mi K ̈vUvq‡bi AvKvi hZ †QvU I A ̈vbvq‡bi AvKvi hZ eo †m †h.MwU ZZ †ewk mg‡hvRx| GLv‡b, Br– AvKv‡i me‡P‡q eo, Al 3+ Gi AvKvi me‡P‡q †QvU| ZvB AlBr3 AwaK mg‡hvRx| 13. cÖ_g UavbwRkb avZz wmwi‡Ri GKwU avZz n‡Z cÖvß M3+ Avq‡bi cuvPwU B‡jKUab 3d mve‡k‡j Aew ̄ Z M3+ AvqbwU Kx n‡Z cv‡i? [DU 18-19] Cr3+ Mn3+ Fe3+ Sc3+ DËi: Fe3+ e ̈vL ̈v: Fe(26)  [Ar] 3d6 4s2 ↿ ↿ ↿ ↿ ↿ 3d5 Fe3+  [Ar] 4s0 A_©vr, 3d AiweUv‡j 5wU e – we` ̈gvb| ZvB M 3+ AvqbwU Fe Gi Avqb Fe3+| 14. e ̈vmv‡a©i mwVK μg †KvbwU? [DU 18-19] Mg2+ < Na+ < Ne Mg2+ < Ne < Na+ Na+ < Mg2+ < Ne Mg2+ > Na+ > Ne DËi: Mg2+ < Na+ < Ne e ̈vL ̈v: Mg2+ Gi B‡jKUab msL ̈v = 12 – 2 = 10 Na+ Gi B‡jKUab msL ̈v = 11 – 1 = 10 Ne Gi B‡jKUab msL ̈v = 10 mgB‡jKUawbK Avqb Ges †g.‡ji g‡a ̈ hvi abvZ¥K PvR© hZ †ewk Zvi AvKvi ZZ †QvU| e ̈vmv‡a©i μg: Mg2+ < Na+ < Ne 15. Li Ges Ne Gi ga ̈eZx© GKwU †g.‡ji 1g mvZwU AvqbxKiY kw3mg~n n‡jv: 1310, 3390, 5320, 7450, 11000, 13300, 71000 kJ mol–1 | †g.jwUi cigvYyi †hvR ̈Zv †k‡ji B‡jKUab web ̈vm Kx? [DU 18-19] 2s2 2s2 2p1 2s2 2p4 2s2 2p6 DËi: 2s2 2p4 e ̈vL ̈v: AvqbxKiY kw3i gvb †_‡K †`Lv hvq 7450 kJ mol–1 Gi ci A‡bK eo kw3i cv_©K ̈ we` ̈gvb| A_©vr 7450 kJ mol–1 cÖ‡qvM Ki‡j †g.jwU 4wU e – Z ̈vM K‡i w ̄ wZkxj n‡e| ÔMÕ bs Ackb n‡Z †`Lv hvq †g.jwU p AiweUvj n‡Z 4wU e – Z ̈vM Ki‡Z cv‡i| 16. SCl2 AYyi AvK...wZ †KvbwU? [DU 18-19; SUST 15-16] Trigonal planar Linear Pyramidal V-shape DËi: V-shape e ̈vL ̈v: SCl2 Gi †K›`axq cigvYy sp3 msKwiZ| Avevi, `yB †Rvov gy3‡Rvo B‡jKUab we` ̈gvb| ZvB SCl2 Gi AvK...wZ †K.wYK ev V AvK...wZ| S wPÎ: SCl2 . Cl Cl . . .
†g.‡ji ch©vqe„Ë ag© I ivmvqwbK eÜb  Varsity Practice Sheet............................................................................................ 3 17. sp3 nvBweaWvB‡Rk‡b KqwU sp3 nvBweaW AiweUvj •Zwi nq? [DU 18-19] 2 3 4 5 DËi: 4 e ̈vL ̈v: sp3 nvBweaW AiweUvj 1wU s AiweUvj I 3wU p AiweUv‡ji mgš^‡q MwVZ nq|  †gvU nvBweaW AiweUvj msL ̈v = 4wU| 18. wb‡¤œi †Kvb †h.‡Mi ùzUbv1⁄4 me‡P‡q †ewk? [DU 18-19] CH4 NH3 PH3 H2S DËi: NH3 e ̈vL ̈v: nvB‡Wav‡Rb cigvYy I wbtm1⁄2 B‡jKUab hyMj hy3 AwaK Zwor FYvZ¥K †QvU AvKv‡ii cigvYyi g‡a ̈ m„ó eÜb †cvjvi nq| AYymg~‡ni g‡a ̈ abvZ¥K cÖv‡šÍ bZzbfv‡e GK AvKl©Y ej m„wó nq Zv‡K nvB‡Wav‡Rb eÜb e‡j| NH3 †h.‡M H eÜb we` ̈gvb| wKš‧ CH4, PH3, H2S G H eÜb †bB| ZvB NH3 Gi ùzUbv1⁄4 †ewk| 19. [Co(NH3)4(H2O)2]Cl3 RwUj †h.MwU‡Z Ae ̄ všÍi avZzwUi mwbœ‡ek msL ̈v KZ? [DU 17-18] 3 4 6 2 DËi: 6 e ̈vL ̈v: RwUj †h.M MVbKv‡j mwbœ‡ek eÜb MV‡b wjM ̈vÛ cÖ`Ë wbtm1⁄2 B‡jKUab hyMj msL ̈v‡K Ae ̄ všÍi avZzi mwbœ‡ek msL ̈v e‡j| [Co(NH3)4(H2O)2]Cl3 GB †h.‡M mwbœ‡ek eÜb MV‡b wjM ̈vÛ H2O I NH3 cÖ`Ë wbtm1⁄2 B‡jKUab hyMj msL ̈v 2 + 4 = 6wU| A_©vr Gi mwbœ‡ek msL ̈v 6| H2O Co H2O H3N: :NH3 H :NH3 3N: 3+ +3Cl –         20. M ̈vmxq Ae ̄ vq GK †gvj cigvYy‡Z GK †gvj B‡jKUab †hvM Ki‡j †h kw3i cwieZ©b nq Zv n‡jvÑ [DU 17-18] B‡jKUa‡b‡MwUwfwU 2q B‡jKUa‡bi Avmw3 1g B‡jKUa‡bi Avmw3 1g AvqbxKiY kw3 DËi: 1g B‡jKUa‡bi Avmw3 e ̈vL ̈v: M ̈vmxq Ae ̄ vq †Kv‡bv †g.‡ji GK †gvj cigvYy‡Z GK †gvj B‡jKUab cÖ‡ek Kwi‡q GK †gvj FYvZ¥K Avq‡b cwiYZ Ki‡j †h cwigvY kw3 wbM©Z nq, Zv‡K B‡jKUab Avmw3 e‡j| 21. wb‡Pi †Kvb †h.MwU PZz ̄ÍjKxq AvK...wZi bq? [DU 17-18] CCl4 NH+ 4 CH4 SF4 DËi: SF4 e ̈vL ̈v: SF4 G nvBweaW AiweUv‡ji msL ̈v, X = 1 2 (6 + 4 – 0 – 0) = 5  sp3 d msKiY we` ̈gvb Ges †h.MwU see-saw AvK...wZi| 22. 4 mwbœ‡ek msL ̈vwewkó RwUj †h.MwU n‡jvÑ [DU 16-17] K4[Fe(CN)6] [Co(NH3)6]Cl3 [Fe(H2O)6]Cl3 [Cu(NH3)4]Cl2 DËi: [Cu(NH3)4]Cl2 e ̈vL ̈v: †Kv‡bv RwUj †h.‡Mi Z...Zxq eÜbxi g‡a ̈ Ae ̄ všÍi avZzi mv‡_ †h KqwU GK‡hvRx wjM ̈vÛ _v‡K Zvi mwbœ‡ek msL ̈v ZZ nq| [Cu(NH3)4]Cl2 †h.‡M Cu Gi mv‡_ 4wU NH3 Av‡Q, ZvB mwbœ‡ek msL ̈v 4| 23. wb‡Pi †Kvb AvqbwUi Rjxq `aeY eY©nxb? [DU 16-17; RU-C 20-21] Ni2+ Fe2+ Cu2+ Zn2+ DËi: Zn2+ e ̈vL ̈v: Ae ̄ všÍi †g.jmg~‡ni myw ̄ Z Avq‡bi d-AiweUvj B‡jKUab Øviv AvswkKfv‡e c~Y© _v‡K| Ae ̄ všÍi †g.jmg~‡ni Rjxq `aeY iwOb nq| Zn2+(30) = 1s2 2s2 2p6 3s2 3p6 3d10 GLv‡b Zn Gi d AiweUvj c~Y©| ZvB Zn Ae ̄ všÍi †g.j bq Ges Gi Rjxq `aeY eY©nxb| 24. wb‡Pi †KvbwU mwVK Zvcxq we‡qvRb μg? [DU 16-17] BaCO3 < SrCO3 < CaCO3 < MgCO3 < BeCO3 BeCO3 < MgCO3 < CaCO3 < SrCO3 < BaCO3 BaCO3 > CaCO3 > SrCO3 > MgCO3 > BeCO3 MgCO3 > CaCO3 > SrCO3 > BeCO3> BaCO3 DËi: BaCO3 < SrCO3 < CaCO3 < MgCO3 < BeCO3 e ̈vL ̈v: K ̈vUvqb hZ †QvU Gi †cvjvivqb ZZ †ewk| †cvjvivqb †ewk n‡j, Zvcxq we‡qvR‡bi μg I evo‡e| MÖæc-2 Gi Rb ̈ †cvjvivqb μg: Be > Mg > Ca > Sr > Ba Zvcxq we‡qvR‡bi μg: BeCO3 > MgCO3 > CaCO3 > SrCO3 > BaCO3 25. wb‡Pi †Kvb †g.jwUi cÖ_g AvqbxKiY kw3 me‡P‡q †ewk? [DU 15-16] Na K Rb Cs DËi: Na e ̈vL ̈v: ch©vq mviwY‡Z GKB MÖæ‡ci †g.jmg~‡ni Dci †_‡K wb‡Pi AvqbxKiY kw3 Kg‡Z _v‡K| KviY ewnt ͇̄ii B‡jKUa‡bi cÖwZ wbDwK¬qv‡mi AvKl©Y Kg‡Z _v‡K| Na, K, Rb, Cs n‡jv MÖæc-1 Gi †g.j| AvqbxKiY kw3i μg: Na > K > Rb > Cs|
4 ....................................................................................................................................  Chemistry 1st Paper Chapter-3 26. CH2 = CH – CH2CHO †h.MwU‡Z h_vμ‡g  Ges  e܇bi msL ̈v n‡jvÑ [DU 15-16] 9, 2 8, 4 10, 1 10, 2 DËi: 10, 2 e ̈vL ̈v: CH2 = CH – CH2 – O || C – H myZivs,  e܇bi msL ̈v 10wU Ges  e܇bi msL ̈v 2wU| 27. wb‡¤œi †Kvb AYywU mij‣iwLK? [DU 15-16] CO2 SO2 H2O CH2O DËi: CO2 e ̈vL ̈v: CO2 G nvBweaW AiweUv‡ji msL ̈v, X = 1 2 (4 + 0 – 0 + 0) = 2  sp msKiY we` ̈gvb| ZvB CO2 AYywU mij‣iwLK| 28. wb‡¤œi †Kvb †h.MwU me‡P‡q kw3kvjx nvB‡Wav‡Rb eÜb MVb K‡i? [DU 15-16; CU 22-23] Ethanol Ethanoic acid Water Ammonia DËi: Ethanoic acid e ̈vL ̈v: B_v‡bvwqK GwmW AvšÍtAvYweK H-eÜb MVb K‡i WvBgvi MVb K‡i| wKš‧ Ethanol, Water, NH3 H-eÜb MV‡bi ci WvBgvi MVb K‡i bv| CH3 – C O H O O H O C – CH3 29. GKwU s AiweUvj Ges GKwU p AiweUv‡ji nvBweaWvB‡Rkb n‡j Avgiv cvBÑ [DU 14-15] Two mutually perpendicular orbitals Two orbitals at 180 Four orbitals directed tetrahedrally Three orbitals in a plane DËi: Two orbitals at 180 e ̈vL ̈v: GKwU s Ges GKwU p AiweUv‡ji nvBweaWvB‡Rkb n‡j sp msKiY nq| hvi eÜb †KvY 180| + 180 s AiweUvj p AiweUvj sp msKi AiweUvj 30. wb‡¤œi 2% (W/V) Rjxq `aeY ̧‡jvi †KvbwUi ùzUbv1⁄4 me‡P‡q †ewk? [DU 14-15] NaCl KCl RbCl NaBr DËi: RbCl e ̈vL ̈v: K ̈vUvq‡bi AvKvi eo I A ̈vbvq‡bi AvKvi †QvU n‡j †h.MwU AwaK AvqwbK cÖK...wZi nq GLv‡b, RbCl me‡P‡q †ewk AvqwbK cÖK...wZi| AvqwbK †h.‡Mi Mjbv1⁄4 I ùzUbv1⁄4 D”P nq| 31. †Kvb wmjfvi n ̈vjvBWwU μxg-e‡Y©i KwVb c`v_©, m~h©v‡jv‡K Kvj‡P nq Ges Nb A ̈v‡gvwbqv `ae‡Y `aexf~Z nq? [DU 14-15] AgF AgCl AgBr AgI DËi: AgBr e ̈vL ̈v: AgF  eY©nxb AgBr  μxg eY© AgCl  mv`v AgI  njy` 32. HCHO AYy‡Z Kve©‡bi nvBweaWvB‡Rkb n‡jvÑ [DU 13-14] sp sp2 sp3 †Kv‡bvwUB bq DËi: sp2 e ̈vL ̈v: H – C || O – H nvBweaW AiweUvj msL ̈v =  eÜb msL ̈v + lone pair electron = 3 + 0 = 3  sp2 msKiY we` ̈gvb| 33. GKwU n ̈vjvBW jeY‡K Nb H2SO4 G DËß Kiv nj| †e ̧wb †avuqvi DrcwË †Kvb Avq‡bi Dcw ̄ wZ wb‡`©kK? [DU 13-14] I – Br– Cl – F – DËi: I – e ̈vL ̈v: Nb H2SO4 Gi mv‡_ DËß nIqvi mgq Av‡qvBWvBW Avqb ̧‡jv Av‡qvwWb M ̈vm Drcbœ K‡i, hv †eMywb †avuqvi AvKv‡i †`Lv hvq| 34. wb‡¤œi †Kvb †h.MwU Rjxq `ae‡Y me‡P‡q mn‡R Av`a©we‡køwlZ nq? [DU 12-13; RU 20-21, 17-18; Agri. Guccho 20-21] CCl4 SnCl2 SiCl4 PbCl4 DËi: SiCl4 e ̈vL ̈v: Si cigvYyi duvKv d-AiweUvj _vKvq SiCl4 Rjxq `ae‡Y mn‡R Av`©a we‡køwlZ nq| MÖæc-14 (IVA) Gi hZ wb‡Pi w`‡K hvIqv nq Av`a© we‡køl‡Yi gvÎv ZZ Kg‡Z _v‡K| Av`©a we‡køl‡Yi μg: PbCl4 < SnCl2 < SiCl4 C Gi †Kv‡bv duvKv d AiweUvj bv _vKvi CCl4 Av`a© we‡køwlZ nq bv| 35. Sr, Tc, Zr Ges Rb cigvYyi e ̈vmv‡a©i μg n‡jvÑ [DU 12-13] Rb > Sr > Zr > Tc Tc > Sr > Rb > Zr Sr > Tc > Zr > Rb Zr > Tc > Rb > Sr DËi: Rb > Sr > Zr > Tc e ̈vL ̈v: ch©vq mviwYi GKB ch©v‡qi evg †_‡K Wv‡b †M‡j cigvYyi e ̈vmva© n«vm cvq Ges GKB MÖæ‡ci Dci †_‡K wb‡Pi w`‡K †M‡j cigvYyi e ̈vmva© e„w× cvq| cÖ`Ë †g.jmg~n cÂg ch©v‡qi †g.j| cvigvYweK e ̈vmv‡a©i μg: Rb > Sr > Zr > Tc|