Tiêu đề গুনগত রসায়ন বোর্ড standard .pdf ✅

̧YMZ imvqb  HSC Preparation 1 wØZxq Aa ̈vq ̧YMZ imvqb Qualitative Chemistry Topicwise CQ Trend Analysis UwcK 2016 2017 2018 2019 2021 2022 †gvU cigvYy g‡Wj I cÖv_wgK aviYv Ñ Ñ Ñ Ñ Ñ iv`vi‡dvW© cigvYy g‡Wj Ñ 1 Ñ Ñ Ñ †evi cigvYy g‡Wj, †KŠwYK fi‡eM, kw3 ͇̄i B‡jKUab Gi kw3 1 3 Ñ Ñ Ñ †Kvqv›Uvg msL ̈vmg~n wewfbœ Dckw3 I B‡jKUab aviY ÿgZv Ñ 2 Ñ 1 Ñ PviwU †Kvqv›Uvg msL ̈v 2 1 3 Ñ Ñ AiweU I AiweUvj Ñ 1 Ñ Ñ Ñ cigvYyi B‡jKUab web ̈vm AvDdevD ûÛ cvDwji eR©b bxwZ 1 1 Ñ 1 Ñ Zwor Pz¤^Kxq eY©vjx (IR UV, MRI) I B‡jKUab ̄’vbvšÍ‡i kw3 1 2 2 1 Ñ eY©vwj I wewfbœ eY©vwji e ̈envi Ñ Ñ Ñ Ñ 2 `ave ̈Zv I `ave ̈Zv ̧Ydj, AvqwbK ̧Ydj I Aa‡ÿc 3 3 2 7 Ñ `ave ̈Zvi Dci mgqb cÖfve Ñ 2 Ñ Ñ Ñ K ̈vUvqb I A ̈vbvqb kbv3KiY Ñ Ñ Ñ Ñ Ñ †Kjvmb Ñ 3 Ñ Ñ Ñ cvZb, `aveK wb®‹vkb I †μvgv‡UvMÖvwd 2 2 Ñ 2 Ñ †evi cigvYy g‡W‡ji wewfbœ cÖ‡qvM Ñ 1 Ñ Ñ Ñ 3 3 2 6 Ñ K ̈vUvqb I A ̈vbvqb kbv3KiY I wkÿv cixÿv 3 3 Ñ 3 Ñ * we.`a.: 2020 mv‡j GBPGmwm cixÿv AbywôZ nqwb| weMZ mv‡j †ev‡W© Avmv m„Rbkxj cÖkœ 1| ............. (n – 1)d5 ns1 [n = 4] [Xv. †ev. 22] (K) AiweUvj msKiY Kx? [Aa ̈vq-3] (L) A¤øxq evdvi `aeY ˆZwi‡Z `ye©j A¤ø e ̈env‡ii cÖ‡qvRbxqZv e ̈vL ̈v Ki| [Aa ̈vq-4] (M) DÏxc‡Ki B‡jKUab web ̈vmwU e ̈wZμgag©xÑ e ̈vL ̈v Ki| Ans:Cr (N) DÏxc‡Ki d Dckw3 ͇̄i we` ̈gvb B‡jKUab ̧‡jvi Ab ̈vb ̈ †Kvqv›Uvg msL ̈vmg~n Awfbœ n‡jI g ̈vM‡bwUK †Kvqv›Uvg msL ̈v wfbœ| Ñ Dw3wU we‡kølY Ki| Ans: Pauli's Exclusion Principle [Xv. †ev. 22] K L M N wPÎ: H cigvYyi D‡ËwRZ Ae ̄’ (K) d eøK †gŠj Kx? [Aa ̈vq-3] (L) HF Gi AvqwbK PwiÎ HCl A‡cÿv †ewk †Kb? [Aa ̈vq-3] (M) DÏxc‡Ki me©ewnt ̄’ †k‡ji me©vwaK B‡jKUab aviY ÿgZv l I m Gi gvb wbY©qc~e©K wnmve Ki| Ans:32 (N) DÏxc‡Ki B‡jKUabwUi ̄’vbvšÍ‡ii d‡j m„ó eY©vwj `„wó‡MvPi n‡e wKbv? MvwYwZK we‡kølY Ki| Ans: wavelength 486.27 nm and visible 2| [Xv. †ev. 22] 50 mL 3.0  10–3 M M2N3 `aeY cvÎ-1 60 mL PQ2 `aeY cvÎ-2 MQ3 †hŠ‡Mi `ave ̈Zv ̧Ydj 4.5  10–8 (K) wmMgv eÜb Kv‡K e‡j? [Aa ̈vq-3] (L) Kve©b WvBA·vBW A‡cvjvi †Kb? [Aa ̈vq-3] (M) cvÎ-1 Gi `aeYwU m¤ú„3 n‡j M2N3 Gi `ave ̈Zv ̧Ydj wnmve Ki| Ans:2.62×10-11 (N) 2bs cv‡Î we` ̈gvb `ae‡Yi NbgvÎv Kgc‡ÿ KZ n‡j 1 I 2 bs cv‡Îi `aeYØq GK‡Î wgwkÖZ Ki‡j MQ3 Gi Aat‡ÿc co‡e? 3| Ans: conc. 0.023M [minimum] and ppt.will happened 4| [iv. †ev. 22] N M L K wbDwK¬qvm wbDwK¬qvm
2  HSC Chemistry 1st Paper [N †kj †_‡K B‡jKUab avcvšÍ‡ii mgq wewKwiZ iwk¥i †dvU‡bi kw3 1.45  10–21 kJ] (K) Zwor FYvZ¥KZv Kv‡K e‡j? [Aa ̈vq-3] (L) `ae‡Yi H3O+ Avq‡bi NbgvÎv 1.0 M Gi †ewk n‡j pH † ̄‹j AKvh©Ki nq †Kb? [Aa ̈vq-4] (M) DÏxc‡Ki Av‡jv‡K me©‡kl Kÿc‡_i AiweUvj msL ̈v wbY©qc~e©K m‡e©v”P aviYK...Z B‡jKUab msL ̈v †Kvqv›Uvg msL ̈vi mvnv‡h ̈ wnmve Ki| (N) DÏxc‡Ki B‡jKUa‡bi avcvšÍ‡ii d‡j wewKwiZ iwk¥i Zi1⁄2‰`‡N© ̈i cv_©K ̈ wbY©q Ki| Ans:170.2 nm 5| [iv. †ev. 22] 25C AlCl3 `aeY 1.5  10–3 gL–1 A-cvÎ 25C NaOH `aeY 2.5  10–2 M B-cvÎ Al(OH)3 KSP = 1.2  10–11 (K) nvB‡Wav‡Rb eÜb Kv‡K e‡j? [Aa ̈vq-3] (L) †d¬vwi‡bi B‡jKUab Avmw3 †K¬vwiY A‡cÿv Kg †Kb? [ms‡kvwaZ] [Aa ̈vq-3] (M) DÏxc‡Ki A cv‡Îi `a‡ei `ave ̈Zv ̧Ydj wbY©q Ki| Ans:4.25×10-19 (N) DÏxc‡Ki A I B cv‡Îi `aeYØq wgwkÖZ Ki‡j wgkÖ `ae‡Yi cÖK...wZ Kxiƒc n‡eÑ MvwYwZKfv‡e we‡kølY Ki| Ans:no ppt. and saturated solution 6| GKRb QvÎ A I B Gi wb¤œiƒc `ywU B‡jKUab web ̈vm wjLj: A(19) = 1s2 2s2 2p6 3s2 3p6 3d1 (AvDdevPD wbq‡g) B(7) = ↿⇂ ↿⇂ ↿⇂ ↿ (û‡Ði wbq‡g) e1 e2 [Kz. †ev. 22] (K) wbivc` Lv` ̈ Kv‡K e‡j? [Aa ̈vq-5] (L) mKj d eøK †gŠj Ae ̄’všÍi †gŠj bqÑ e ̈vL ̈v Ki| [Aa ̈vq-3] (M) e1 Ges e2 Gi †ÿ‡Î cwji eR©bbxwZ hvPvB Ki| (N) DÏxc‡Ki Qv‡Îi wjLv B‡jKUab web ̈vm `ywUi mwVKZv Dchy3 KviYmn we‡kølY Ki| 7| [Kz. †ev. 22] + A B‡jKUab wewKiY B C D E cigvYy g‡Wj (K) B‡jKUab Avmw3 Kv‡K e‡j? [Aa ̈vq-3] (L) Kc Gi gvb Amxg nq bv †Kb? e ̈vL ̈v Ki| [Aa ̈vq-4] (M) DÏxc‡Ki wewKwiZ iwk¥i Zi1⁄2‰`N© ̈ wnmve Ki| Ans:1.026×102 nm (N) “D †k‡j 32 wUi †ewk B‡jKUab _vK‡Z cv‡i bv”Ñ †Kvqv›Uvg msL ̈vi Av‡jv‡K we‡kølY Ki| [ms‡kvwaZ] 8| [Kz. †ev. 22] 100 mL 6  10–4 M CuSO4 `aeY A 80 mL †mw›U‡gvjvi NaOH `aeY B Cu(OH)2 Gi KSP = 1.0  10–16 (K) GUg B‡Kvbwg Kv‡K e‡j? [Aa ̈vq-4] (L) msiÿ‡Yi Rb ̈ Lv` ̈‡K evqygy3 ivL‡Z nqÑ e ̈vL ̈v Ki| [Aa ̈vq-5] (M) DÏxc‡Ki Av‡jv‡K Cu(OH)2 Gi `ave ̈Zv wnmve Ki| Ans:2.92×10-6 (N) A I B Gi `aeY `ywU‡K GK‡Î wgwkÖZ Ki‡j Aat‡ÿc m„wói m¤¢ve ̈Zv MvwYwZKfv‡e we‡kølY Ki| Ans:kip 6.56×10-9 ppt.will happened 9| [h. †ev. 22] 2 Amxg He+ A B C D RH = 109678 cm–1 (K) nvB‡Wav‡Rb eÜb Kx? [Aa ̈vq-3] (L) O I S Gi g‡a ̈ †KvbwUi B‡jKUab Avmw3 †ewk Ges †Kb? [Aa ̈vq-3] (M) DÏxc‡Ki B‡jKUabwU C Kÿc_ n‡Z B Kÿc‡_ avcvšÍiKv‡j wewKwiZ kw3i cwigvY MYbv Ki| Ans:3.03×10-19 (N) DÏxcK g‡Z Amxg `~iZ¡ †_‡K B‡jKUab B †k‡j †b‡g Avm‡j weKxY© kw3 `„k ̈gvb n‡e wK-bv? MvwYwZKfv‡e we‡kølY Ki| Ans:365nm , not visible 10| [h. †ev. 22] 40 ml 6  10–2 M A3B2 `aeY cvÎ-1 80 ml 6  10–3 M XY `aeY cvÎ-2 AY2 Gi `ave ̈Zv ̧Ydj Ksp = 4.8  10–7 (K) A ̈vw›U Aw·‡W›U Kx? [Aa ̈vq-5] (L) PH3 A‡cÿv NH3 AwaK ÿviag©x; Gi KviY e ̈vL ̈v Ki| [Aa ̈vq-3] (M) DÏxc‡Ki cvÎ-1 Ges cvÎ-2 Gi wgwkÖZ `ae‡Y B 3– Avq‡bi NbgvÎv MYbv Ki| Ans:0.04 M
̧YMZ imvqb  HSC Preparation 3 (N) DÏxc‡Ki cvÎ-1 Ges cvÎ-2 Gi `aeY wgwkÖZ Ki‡j AY2 Gi Aat‡ÿc co‡e wK? MvwYwZKfv‡e we‡kølY Ki| Ans:kip9.6×10-7 ppt.will happened 11| [P. †ev. 22] M(OH)3 60 mL 0.03 M `aeY-A M2SO4 0.04 M 50 mL `aeY-B Ksp[M2(SO4)3] = 1.75  10–11 (K) eY©vwj Kv‡K e‡j? [Aa ̈vq-2] (L) meyR imvq‡bi cÖ‡qvRbxqZv e ̈vL ̈v Ki| [Aa ̈vq-4] (M) DÏxc‡Ki A `ae‡Y OH– Gi NbgvÎv g/L GK‡K wnmve Ki| Ans:1.53 (N) `aeYØq wgwkÖZ Ki‡j Aat‡ÿc co‡e wK? MvwYwZKfv‡e we‡kølY Ki| Ans:kip1.6×10-9 ppt.will happened 12| [P. †ev. 22] n = 5 n = 4 n = 3 z = 1 n = 2 n = 1 RH = 109678 cm–1 (K) †bmjvi weKviK Kv‡K e‡j? [Aa ̈vq-2] (L) CuSO4. 5H2O †hŠ‡Mi g‡a ̈Kvi eÜb ̧‡jv †`LvI| [Aa ̈vq-3] (M) DÏxc‡Ki Av‡jv‡K Kxfv‡e †gŠj kbv3 Kiv hvq? e ̈vL ̈v Ki| (N) DÏxc‡Ki B‡jKUabwUi 5 → 3 Kÿc‡_ ̄’vbvšÍ‡ii †ÿ‡Î cÖvß eY©vwji cÖ‡qvM AZ ̈šÍ ̧iæZ¡c~Y©Ñ Av‡jvPbv Ki| 13| [e. †ev. 22] B‡jKUab ywbDwK¬qvm g‡Wj-B B‡jKUab ywbDwK¬qvm g‡Wj-A (K) û‡Ûi bxwZwU †jL| [Aa ̈vq-2] (L) HF Ges HI Gi g‡a ̈ †KvbwU AwaK kw3kvjx A¤øÑ e ̈vL ̈v Ki| [Aa ̈vq-4] (M) DÏxc‡Ki B g‡WjwU H cigvYyi n‡j B‡jKUa‡bi wewKwiZ iwk¥i K¤úv1⁄4 wbY©q Ki| Ans:2.92×1015 (N) A Ges B g‡W‡ji g‡a ̈ †KvbwU AwaKZi Dc‡hvMx e‡j g‡b KiÑ we‡kølY Ki| 14| † [e. †ev. 22] 30 mL 0.01 M 0.02 AgCl KSP(AgCl) = 1.7  10–10 (K) AiweUvj Kx? [Aa ̈vq-2] (L) PCI5 GKwU AóK m¤úamviY †hŠMÑ e ̈vL ̈v Ki| [Aa ̈vq-3] (M) DÏxc‡Ki A¤øxq Avq‡bi kbv3Kvix cixÿv mgxKiYmn †jL| (N) DÏxc‡Ki `ae‡Y 0.1 M HCl †hvM Ki‡j `ave ̈Zv ̧Yd‡ji †Kv‡bv cwieZ©b NU‡e wKbvÑ we‡kølY Ki| Ans:1.699×10-9 15| [wm. †ev. 22] n = 4 n = 3 n = 2 n = 1 e – A nm n =  (K) jv-k ̈v‡Zwjqvi bxwZ †jL| [Aa ̈vq-4] (L) IR iwk¥i e ̈envi †jL| [Aa ̈vq-2] (M) A Gi gvb wbY©q Ki| Ans:0.15862nm (N) DÏxc‡K DwjøwLZ eY©vjxi Zi1⁄2 ˆ`N© ̈ wbY©qc~e©K e ̈envi Av‡jvPbv Ki| Ans:364.70 nm 16| [w`. †ev. 22] A `aeY B `aeY NH4OH weKviK X NaOH weKviK Y A 2+  [Ar]3d9 (K) cvwbi AvqwbK ̧Ydj Kx? [Aa ̈vq-4] (L) ivmvqwbK mvg ̈ve ̄’vi MwZkxjZv e ̈vL ̈v Ki| [Aa ̈vq-4] (M) DÏxc‡Ki A `aeYwU‡Z DÏxc‡Ki weKviK X ax‡i ax‡i †hvM Ki‡j Kx cwieZ©b jÿ Ki‡e Zv mgxKiYmn †jL| (N) `ywU wfbœ †U÷wUD‡e DÏxc‡Ki B `ae‡Y ax‡i ax‡i weKviK X I Y †hvM Ki‡j Kx N‡U? mgxKiYmn wjL| 17| [w`. †ev. 22] cvÎ-1 [PY2 Gi KSP = 1.85  10–8 ] 0.5 M 50 mL PQ Gi `aeY cvÎ-2 0.1 M 50 mL XY Gi `aeY (K) A‡¤øi we‡qvRb aaæeK Ka Kx? [Aa ̈vq-4] (L) pH † ̄‹j 0 †_‡K 14 Gi g‡a ̈ mxgve× †Kb? [Aa ̈vq- 4] (M) 1g I 2q cv‡Îi wgwkÖZ `ae‡Y P 2+ Gi NbgvÎv wbY©q Ki| Ans:0.25M(N)1g I 2q cv‡Îi wgkÖ‡Y PY2
4  HSC Chemistry 1st Paper Aatwÿß n‡e wK-bv? MvwYwZKfv‡e we‡kølY Ki|Ans:kip6.25×10-4 ppt.will happened 18| [g. †ev. 22] cigvYyi g‡Wj jÿ Ki: e M †kj L †kj K †kj wbDwK¬qvm (K) AiweUvj Kx? [Aa ̈vq-4] (L) 2d AiweUv‡ji Aw ̄ÍZ¡ †bB †Kb? [Aa ̈vq-2] (M) DÏxc‡Ki B‡jKUabwvUi avcvšÍ‡ii d‡j m„ó wewKi‡Yi Zi1⁄2‰`N© ̈ wbY©q Ki| Ans:656.47nm (N) l Ges m Gi gvb e ̈envi K‡i cigvYywUi †kl kw3 ͇̄ii †gvU B‡jKUab msL ̈v wbY©q Ki| 19| [g. †ev. 22] 150 mL 10–3 (mol L–1 ) AlCl3 m¤ú„3 `aeY A-cvÎ 100 mL 10–2 (mol L–1 ) NaOH Gi `aeY B-cvÎ 25 ZvcgvÎvq Al(OH)3 Gi KSP = 1.9  10–33 (K) evdvi `aeY Kx? [Aa ̈vq-4] (L) Cr(24) Gi B‡jKUab web ̈vm e ̈wZμgag©x †Kb? (M) A cv‡Îi je‡Yi `ave ̈Zv ̧Ydj wbY©q Ki| Ans:2.7×10-11 (N) A Ges B cv‡Îi wgkÖY †_‡K Al(OH)3 Aatwÿß n‡e wK-bv? MvwYwZKfv‡e we‡kølY Ki| Ans:kip3.84×10-11 ppt.will happened 20| [g. †ev. 22] †jLwPÎwU jÿ ̈ Ki: 70 60 50 40 30 20 10 KCl Gi 250g m¤ú„3 `aeY → `ave ̈Zv (g/100g `aveK) KCl 25C 50C → ZvcgvÎv (C) → A-cvÎ 500g AgCl m¤ú„3 `aeY – – – – – B-cvÎ (K) pH Kx? [Aa ̈vq-4] (L) cvwbi AvqwbK ̧Ydj †_‡K Kxiƒ‡c pH † ̄‹‡j ˆZwi Kiv nq? [Aa ̈vq-4] (M) A cv‡Îi `aeY‡K 50C ZvcgvÎvq kxZj Ki‡j KZ MÖvg KCl jeY †KjvwmZ n‡e? Ans:22.33gm (N) A cv‡Îi `aeY‡K B cv‡Îi `ae‡Y †hvM Ki‡j AgCl je‡Yi `ave ̈Zv n«vm N‡U wK? Dˇii c‡ÿ hyw3 `vI| 21| [Xv. †ev. 21] jeY XY  28C 130 gm H2O m¤ú„3 `aeY 1bs `aeY 32C XY Gi `aeY 2bs `aeY XY `aeY 3bs `aeY DËßKiY XY Gi KSP = 4  10–11 mol2 L –2 [28C Ges 32C ZvcgvÎvq XY jeYwUi `ave ̈Zv h_vμ‡g 35 Ges 45] (K) ivmvqwbK mvg ̈ve ̄’v Kx? [Aa ̈vq-4] (L) mvg ̈ aaæe‡Ki gvb KL‡bv k~b ̈ ev Amxg nq bv †Kb? [Aa ̈vq-4] (M) 2bs `aeY‡K m¤ú„3 Ki‡Z Kx cwigvY AwZwi3 `ae †hvM Ki‡Z n‡eÑ MYbv Ki| Ans:13g (N) 0.01 M XY `aeY 3bs `ae‡Y †hvM Kiv n‡j XZ Gi `ave ̈Zvi †Kv‡bv cwieZ©b n‡e Kx? MvwYwZK hyw3 `vI| Ans:before ksp6.3×10-6 and after ksp4×10-9 22| [Xv. †ev. 21] Zn2+ Al3+ 1bs cvÎ Ag2CO3 Gi m¤ú„3 Rjxq `aeY 2bs cvÎ Zn(OH)2, Al(OH)3 Ges Ag2CO3 Gi KSP h_vμ‡g 3.0  10–17, 3.0  10–34 Ges 8.5  10–12| (K) ÿv‡ii we‡qvRb aaæeK Kb Kx? [Aa ̈vq-4] (L) Zij Ae ̄’vq B_v‡bvwqK GwmW cwjgvi MVb K‡iÑ e ̈vL ̈v Ki| [Aa ̈vq-5] (M) 2bs cv‡Î Ag+ Avq‡bi NbgvÎv wnmve Ki| Ans:2.57×10-4 (N) 1bs cv‡Îi `ae‡Y NH4Cl Gi Dcw ̄’wZ‡Z NH4OH †hvM Kiv n‡j †Kvb AvqbwU Av‡M Aatwÿß n‡e? we‡kølY Ki| 23| [iv. †ev. 21] B‡jKUab ‘X’ B‡jKUab ‘Y’ Kÿc_ A B C D (K) pH † ̄‹j Kx? [Aa ̈vq-4] (L) Be I B Gi g‡a ̈ Kvi AvqwbKiY kw3 †ewk I †Kb? [Aa ̈vq-3] (M) DÏxc‡K DwjøwLZ g‡WjwUi me©ewnt ̄’ Kÿc‡_ m‡e©v”P KqwU B‡jKUab _vK‡j cv‡i Zv †Kvqv›Uvg msL ̈vi mvnv‡h ̈ wbY©q Ki| (N) DÏxc‡K ‘X’ Ges ‘Y’ Gi avcvšÍ‡ii d‡j m„ó Zi1⁄2 Pz¤^Kxq wewKi‡Yi GKB A‡j cvIqv hv‡e wKbv Zv MvwYwZKfv‡e g~j ̈vqb Ki| Ans: from x 486nm and from y 656.47nm 24| [iv. †ev. 21] †gŠj cvigvYweK msL ̈v A 16 B 24 C 26 [cÖPwjZ A‡_© ‘A’, ‘B’ Ges ‘C’ †gŠ‡ji cÖZxK bq] (K) cwji eR©bxwZ Kx? (L) ivmvqwbK mvg ̈ve ̄’v MwZkxjÑ e ̈vL ̈v Ki| [Aa ̈vq-4]