Title Qualitative Chemistry Varsity Practice Sheet_With Solve-25.pdf ✅

̧YMZ imvqb  Varsity Practice Sheet ............................................................................................................................. 1 MCQ weMZ mv‡j DU-G Avmv cÖkœvejx 1. †Kvb d-AiweUvj ̧‡jv Aÿ eivei Aew ̄’Z? [DU-A 24-25] dx 2–y 2, dz 2 dxy, dz 2 dyz, dx 2–y 2 dxy, dxz DËi: dx 2–y 2, dz 2 e ̈vL ̈v: dxy, dyz Ges dxz AiweUv‡j B‡jKUab †gN `ywU A‡ÿi gv‡S 45 †Kv‡Y _v‡K| Aciw`‡K, x I y Aÿ eivei dx2–y2 Ges z Aÿ eivei dz 2 _v‡K| 2. Sc †gŠ‡ji 3d1 B‡jKUabwUi †Kvqv›Uvg msL ̈vi m¤¢ve ̈ †mU †KvbwU? [DU 23-24; SUST 19-20]     3 2 0 + 1 2     3 1 0 + 1 2     3 1 0 – 1 2     3 0 0 + 1 2 DËi:     3 2 0 + 1 2 e ̈vL ̈v: †Kvqv›Uvg msL ̈v †ÿ‡Î,  l Gi gvb 0 †_‡K (n – 1) ch©šÍ nq|  m Gi gvb – l †_‡K 0 mn + l ch©šÍ nq| Sc Gi 3d1 B‡jKUa‡bi †ÿ‡Î, n = 3; l = 2; m = 0; s = + 1 2 3. Al(OH)3 Gi `ave ̈Zv hw` Ôs’ nq Z‡e Gi `ave ̈Zv ̧Yv‡1⁄4i gvb KZ? [DU 23-24; RU-C 21-22; JUST 19-20] 27s2 s 4 3s4 27s4 DËi: 27s4 e ̈vL ̈v: Al(OH)3 ⇌ Al 3+ + 3OH– s s 3s  `ave ̈Zv ̧Yv1⁄4, Ksp = [Al 3+] × [OH– ] 3 = s × (3s)3 = 27s4 4. wb‡Pi †Kvb †Rvov †hŠ‡M mgAvqb cÖfve we` ̈gvb? [DU 23-24; BSMRSTU 18-19] CH4, HCl NaCl, CH3Cl H2S, HCl CaCl2, C6H5Cl DËi: H2S, HCl e ̈vL ̈v: Rjxq `ae‡Y H2S wb‡¤œv3fv‡e mvg ̈ve ̄’vq _v‡K: H2S ⇌ 2H+ + S2– Rjxq `ae‡Y HCl wb‡¤œv3fv‡e mvg ̈ve ̄’vq _v‡K: HCl  H + + Cl – Dfq Rjxq `ae‡Y H + Avqb we` ̈gvb| ZvB †hŠM؇qi g‡a ̈ mg-Avqb cÖfve we` ̈gvb| 5. wbDwK¬qv‡mi Pviw`‡K B‡jKUa‡bi cwiåg‡Yi †ÿ‡Î wbw`©ó Kÿc‡_i aviYv w`‡q‡Qb †Kvb weÁvbx? [JU-D 22-23] iv`vi‡dvW© †evi cvDwj nvB‡RbevM© DËi: †evi e ̈vL ̈v: weÁvbx †evi Zvi cigvYy g‡W‡j wb‡¤œv3 aviYv ̧‡jv cÖ`vb K‡ib: (i) B‡jKUa‡bi w ̄’i Kÿc_ ev kw3 ̄Íi m¤úwK©Z aviYv (ii) †KŠwYK fi‡eM m¤úwK©Z aviYv (iii) kw3i †kvlY ev wewKiY Ges eY©vwj m¤úwK©Z aviYv 6. wb‡Pi †Kvb Zwor †PŠ¤^Kxq wewKi‡Yi Zi1⁄2‰`N© ̈ me‡P‡q †ewk? [DU 22-23] AwZ‡e ̧wb iwk¥ Ae‡jvwnZ iwk¥ G·-iwk¥ †iwWI Zi1⁄2 DËi: †iwWI Zi1⁄2 e ̈vL ̈v: wewfbœ ai‡bi Zwor Pz¤^Kxq wewKi‡Yi Zi1⁄2‰`N© ̈: Zwor Pz¤^Kxq wewKiY Zi1⁄2ˆ`N© ̈ gnvRvMwZK iwk¥ < 0.0005 nm Mvgv iwk¥ 0.0005 nm – 0.01 nm iÄb iwk¥ 0.01 nm – 10 nm AwZ‡e ̧wb iwk¥ 10 nm – 380 nm `„k ̈gvb Av‡jv 380 nm – 780 nm Ae‡jvwnZ iwk¥ 780 nm – 1mm gvB‡μvI‡qf AÂj 1 mm – 1 m †iwWI I †Uwjwfkb 1 mm – 10 km myZivs, Zi1⁄2‰`‡N© ̈i μg: -ray < X-ray < UV-ray < Visible-ray < IR-ray < Microwave < Radiowave 7. NH+ 4 Avq‡bi Dcw ̄’wZ wbY©‡q e ̈eüZ weKviKwU n‡jvÑ [DU 22-23; JU-A 22-23] NaOH K4[Fe(CN)6] NaOH, K2HgI4 (NH4)2C2O4 DËi: NaOH, K2HgI4 e ̈vL ̈v: NH+ 4 Avqb kbv3Ki‡Y †bmjvi `aeYmn cixÿv Kiv nq| †bmjvi `aeY ev †bmjvi weKviK n‡jv NaOH ev KOH `aeY wgwkÖZ ÿvixq cUvwkqvg †UUavAv‡qv‡Wv gviwKD‡iU (II) Gi `aeY (NaOH/KOH + K2[HgI4] wgkÖY)