Tiêu đề 3. Che. Engg. 1st Paper-Practice Sheet-24 (With Solve).pdf ✅

†gŠ‡ji ch©vqe„Ë ag© I ivmvqwbK eÜb  Engineering Practice Sheet .................................................................................... 1 WRITTEN weMZ mv‡j BUET-G Avmv cÖkœvejx 1. wb‡¤œv3 cvigvYweK msL ̈vwewkó †gŠjmg~‡ni B‡jKUab web ̈vm †`LvI Ges ch©vq mviwY‡Z Ae ̄’vb wbY©q Ki| (a) 38 (b) 54. [BUET 20-21] [Medium] mgvavb: (a) 38Sr : [Kr] 5s2 ch©vq: 5 MÖæc: 2 (b) 54Xe : [Kr] 4d10 5s2 5p6 ch©vq: 5 MÖæc: 18 2. ch©vq mviwY‡Z d-eøK †gŠjmg~‡ni msL ̈v KZwU? [BUET 19-20] [Easy] mgvavb: 41 wU| 3. wb‡Pi ˆRe AYyi msKiYmg~n kbv3 Ki Ges †mB mv‡_ †gvU  eÜb I  eÜb Gi msL ̈v wbY©q Ki| [BUET 19-20] [Easy] C – C  C – H H H H C = C H H mgvavb: C – C  C – H H H H C = C H H sp2 sp2 sp3 sp sp †gvU -eÜb  10wU; †gvU -eÜb  3wU 4. P, Q, R Ges S GKB ch©v‡qi PviwU †gŠj hvi g‡a ̈ P Ges Q s- eøKfz3| Q Ges S wewμqv K‡i Q + S – MVb K‡i| R Ges S hy3 n‡q RS2 mg‡hvRx †hŠM Drcbœ K‡i| (i) †gŠj ̧‡jv †Kvb †Kvb MÖæ‡c Aew ̄’Z- e ̈vL ̈vmn wjL| (ii) P Ges S Øviv MwVZ †hŠMwUi ms‡KZ I cÖK...wZ wjL| (iii) Q Ges R Øviv MwVZ †hŠ‡Mi ms‡KZ I cÖK...wZ wjL| [KUET 19-20] [Medium] mgvavb: (i) Q + S – MV‡bi mgq Q I S GKK PvR©hy3 K ̈vUvqb I A ̈vbvqb ˆZwi K‡i| Zvn‡j Q MÖæc-1 Ges S MÖæc-17 †Z _vK‡e| GKB ch©v‡q s eø‡K †Kej `yBwU †gŠj _v‡K| Zvn‡j P, MÖæc 2 G Aew ̄’Z| R, S Gi mv‡_ RS2 ˆZwi K‡i| A_©vr R Gi †hvR ̈Zv ͇̄i wbw®Œq M ̈v‡mi †P‡q 2wU e – Kg| myZivs , R MÖæc 16 G Aew ̄’Z| (ii) P, S Øviv MwVZ †hŠM PS2| GwU AvqwbK| (iii) Q, R Øviv MwVZ †hŠM Q2R| GwU AvqwbK| 5. wb¤œwjwLZ †hŠMmg~n‡K eÜb †Kv‡Yi wb¤œZi μgvbymv‡i mvRvI| CH4, NH3, BeCl2, H2O [BUET 18-19] [Easy] mgvavb: BeCl2 > CH4 > NH3 > H2O H C H H H N H H H .. O H H . . . . Cl – Be – Cl eÜb †KvY: 180 109.5 107 104.5 6. wb¤œwjwLZ †gŠjmg~n‡K mwμqZvi wb¤œZi μgvbymv‡i mvRvI| K, Na, Cs, Rb, Li [BUET 18-19] [Easy] mgvavb: Cs > Rb > K > Na > Li MÖæc-1 Gi †gŠjmg~‡ni AvKvi hZ e„w× cvq ZZ e – `vb Kiv mnR nq e‡j mwμqZv ev‡o| Li Na K Rb Cs AvKvi evo‡j mwμqZv ev‡o 7. wP‡Îi mvnv‡h ̈ †`LvI †h, wmMgv () eÜb s – s A_ev s – p A_ev p – p AiweUv‡ji Awaμg‡Yi gva ̈‡g MwVZ nq wKš‘ pi() eÜb ïaygvÎ p – p AiweUvj Awaμg‡Yi gva ̈‡g MwVZ nq| [BUET 18-19, 05-06] [Medium] mgvavb: gy‡LvgywL AwaμgY n‡j  eÜb ˆZwi nq| s-s s-p p-p -eÜb  e܇bi Rb ̈ Av‡M -eÜb Dcw ̄’Z _vKv jvM‡eB| wKš‘ s me©`v ïay gy‡LvgywL AwaμgY-B K‡i, ZvB px – px gy‡LvgywL AwaμgY n‡j py – py, pz – pz G  eÜb n‡e| -eÜb 8. (a) wb¤œwjwLZ †hŠMmg~n‡K AvqwbK a‡g©i wb¤œZi μgvbymv‡i mvRvI| NaF, NaI, NaBr, NaCl (b) wb¤œwjwLZ †hŠMmg~n‡K cvwb‡Z `ave ̈Zvi wb¤œZi μgvbymv‡i mvRvI| AgBr, AgI, AgCl, AgF [BUET 18-19] [Easy] mgvavb: (a) dvRv‡bi bxwZ Abyhvqx, A ̈vbvq‡bi AvKvi evo‡j, mg‡hvRx ag© e„w× cvq d‡j AvqwbK ag© K‡g hvq| AvqwbK a‡g©i μg: NaF > NaCl > NaBr > NaI (b) GLv‡bI A ̈vbvq‡bi AvKvi e„w×i Kvi‡Y cvwb‡Z `ave ̈Zv K‡g hvqÑ AgF > AgCl > AgBr > AgI