Tiêu đề 5. Engg. Question-Bank Chapter-05 With Solve.pdf ✅

Kg©gyLx imvqb  Engineering Practice Sheet ..................................................................................................................... 1 WRITTEN weMZ mv‡j BUET-G Avmv cÖkœvejx 1. wb‡Pi Q‡K ewY©Z Lv` ̈/K...wl cY ̈mg~n msiÿ‡Yi Rb ̈ cÖ‡`q ZvwjKv †_‡K Dchy3 wcÖRvi‡fwUf wbe©vPb Ki| cÖ‡`q wcÖRvi‡fwU‡fi ZvwjKv jeY (NaCl), wf‡bMvi, wPwb, CO Ges -iwk¥| (i) Hilsha Fish (Bwjk gvQ) (ii) Pickle (AvPvi) (iii) Jelly (†Rjx) (iv) Soft drink (†Kvgj cvbxq) (v) Crop seed (km ̈ exR) [BUET 19-20] [Easy] mgvavb: (i) jeY (NaCl), (ii) wf‡bMvi, (iii) wPwb, (iv) CO2 (v) -iwk¥ 2. (a) Miæi `y‡a Lv` ̈ K ̈vjwi (kcal/100 g) KZ _v‡K? (b) Miæi `y‡ai wgóZv †Kvb Dcv`vb Gi Dci wbf©i K‡i? (c) Miæi `y‡ai cÖavb Dcv`vb wK? [BUET 19-20] [Medium] mgvavb: (a) 69-70 kcal/100 g (b) j ̈vK‡UvR (c) cvwb 3. Lv` ̈MÖn‡Yi ci kix‡ii BMR †e‡o hvq| BMR Kx? [BUET 18-19] [Easy] mgvavb: †`‡ni Af ̈šÍ‡i cÖvY ivmvqwbK cÖwμqv mg~n (Basal Metabolism) m¤úv`‡bi Rb ̈ †h b~ ̈bZg kw3 cÖ‡qvRb, Zv‡K Basal Metabolism Rate (BMR) e‡j| c~Y©eq ̄‹ cyiæ‡li †ÿ‡Î BMR Gi gvb 6694.4 kJ Ges c~Y©eq ̄‹ bvixi †ÿ‡Î BMR Gi gvb 6276 kJ| 4. Av‡c‡ji mv‡_ Kjv ivL‡j Av‡cj ZvovZvwo †c‡K hvq †Kb? UvKvi g‡a ̈ †Kvb ivmvqwbK `ae ̈ _v‡K? [BUET 15-16] [Medium] mgvavb: K...wÎg c×wZ‡Z dj cvKv‡bvi Rb ̈ •Re M ̈vm Bw_wjb (CH2 = CH2) e ̈envi Kiv nq| cvKv Kjvi †Lvmv n‡Z Bw_wjb M ̈vm e ̈vcb cÖwμqvq Qwo‡q c‡i| ZvB Av‡c‡ji mv‡_ Kjv ivL‡j, Kjv †_‡K e ̈vwcZ Bw_wjb M ̈vm Av‡cj‡K ZvovZvwo cvK‡Z mnvqZv K‡i| UvKv ev Kv‡iwÝ †bv‡U Security device iƒ‡c Ac&wUK ̈vj †mÝi dm‡dvi (Phosphor) bvgK we‡kl ivmvqwbK c`v_© e ̈eüZ nq| 5. Pvgov wcKwjs G †Kvb GwmW e ̈envi Kiv nq? [BUET 15-16] [Medium] mgvavb: H2SO4 6. MvVwbK ms‡KZ wjL: BHA, BHT, TBHQ, †WUj, †gb_j, U ̈vjKg, m ̈vKvwib, miweUj| [BUET 15-16] [Hard] mgvavb: BHA: C HC C C(CH3)3 HC CH C OH O – CH3 TBHQ: C HC C C(CH3)3 HC CH C OH OH †gb_j: CH3 OH H3C – CH – CH3 †WUj: OH CH3 Cl H3C BHT: C C C C(CH3)3 HC CH C CH3 OH (H3C)3C m ̈vKvwib: O NH O S O U ̈vjKg: [H2Mg3(SiO3)4] miweUj: CH2 | OH – CH | OH – CH | OH – CH | OH – CH | OH – CH2 | OH 7. wf‡bMvi Kxfv‡e e ̈vK‡Uwiqv aŸsm K‡i? [BUET 15-16] [Medium] mgvavb: B_v‡bvwqK Gwm‡Wi 6 – 10% Rjxq `aeY wf‡bMvi| Lv` ̈`a‡e ̈ wf‡bMvi †hvM Ki‡j Zv Dcv`v‡bi pH gvb‡K Kwg‡q †`q| G gvb 5 †_‡K 4 Gi wb‡P †b‡g Av‡m| Avi †h me Lv` ̈`a‡e ̈ pH Gi gvb 4.5 Gi †P‡q Kg, Zv e ̈vK‡Uwiqv Øviv mn‡R bó nq bv| Gfv‡eB wf‡bMvi pH Gi gvb Kwg‡q Lv` ̈`ae ̈‡K e ̈vK‡Uwiqvi AvμgY †_‡K iÿv K‡i| GQvovI wf‡bMvi e ̈vK‡Uwiqvi Ôactive siteÕ mg~n‡K cÖkwgZ K‡i †d‡j| e ̈vK‡Uwiqv †_‡K wbtm„Z GbRvBg Lv` ̈ cP‡bi dvi‡g‡›Ukb wewμqvq cÖfveK wn‡m‡e KvR K‡i|
2 ....................................................................................................................................  Chemistry 1st Paper Chapter-5 GbRvB‡gi †cÖvwUb wkK‡ji bvB‡Uav‡R‡b †h gy3 B‡jKUab †Rvo _v‡K Zv G cÖfveb wμqvi Rb ̈ Ôactive siteÕ mieivn K‡i| wKš‘ wf‡bMv‡i Dcw ̄’Z B_v‡bvwqK GwmW `aeY †h H + mieivn K‡i Zv H Ôactive siteÕ †K cÖkwgZ K‡i| – .. N – .. N – + H+  – H + .. N – H + .. N – d‡j GbRvBg Avi cÖfveb wμqv NUv‡Z cv‡i bv| ZvB Lv‡` ̈ dvi‡g‡›Ukb N‡U bv| 8. gë-wf‡bMvi cÖ ̄‘wZ‡Z wewμqvi k~b ̈ ̄’vb ̧‡jv c~iY Ki| (i) C12H22O11 + C6H12O6 + (ii) C6H12O6 2 + 2CO2 (iii) + O2 CH3COOH + [BUET 15-16] [Medium] mgvavb: (i) C12H22O11 + C6H12O6 + Bbfv‡U©m 37C H2O C6H12O6 (ii) C6H12O6 2 RvB‡gm 20 – 24C CH3 – CH2 – OH + 2CO2 (iii) + O2 CH3COOH + A ̈vwm‡Uv CH3CH2OH H2O e ̈vKUi weMZ mv‡j RUET-G Avmv cÖkœvejx 1. (a) A ̈vw›U Aw·‡W›U Kx? [RUET 18-19] [Medium] (b) wb¤œwjwLZ A ̈vw›U Aw·‡W›U ̧‡jvi MvVwbK ms‡KZ wjL? (i) BHT (ii) Propyl Gallate (iii) TBHQ mgvavb: (a) Pwe© ev wjwcW AYyi RviY-we‡hvR‡b Ask MÖnYKvix O2 AYy I wjwcW AYy †_‡K m„ó gy3 gyjK‡K †kvlY K‡i wKQz ivmvqwbK c`v_© Pwe©hy3 Lv` ̈e ̄‘i cPb †iva K‡i| Gme ivmvqwbK c`v_©‡K A ̈vw›U Aw·‡W›U e‡j| (b) (i) BHT ev weDUvB‡j‡UW nvBWaw· UjyBb: CH3 C – CH3 OH CH3 CH3 – C CH3 CH3 CH3 (ii) Propyl Gallate: COOCH2CH2CH3 OH OH OH (iii) TBHQ ev Uviwkqvix weDUvBj nvB‡WavKzB‡bvb: CH3 C – CH3 OH CH3 OH 2. Lv` ̈ msiÿK Kx? [RUET 17-18] [Easy] mgvavb: Lv` ̈ msiÿY n‡jv †mmKj cÖvK...wZK ev ivmvqwbK c`v_© hv Aí cwigv‡b Lv` ̈e ̄‘i mv‡_ wgwk‡q Lv` ̈e ̄‘‡K dvsMvm I e ̈vK‡Uwiqvi AvμgY A_ev Lv` ̈e ̄‘i GbRvB‡gi cÖfv‡e cPb †iva Kiv hvq| Lv` ̈ msiÿK e ̈envi Kivi D‡Ïk ̈: (i) Lv‡` ̈i cywó gvb AÿzYœ ivLv (ii) Lv‡` ̈i ̄’vwqZ¡Kvj evov‡bv (iii) Lv‡` ̈ †Kv‡bv welv3 c`v_© hy3 bv n‡Z †`Iqv MCQ weMZ mv‡j CKRUET-G Avmv cÖkœvejx 1. gë wf‡bMvi cÖ ̄‘wZ‡Z wb‡¤œv3 ivmvqwbK wewμqvmg~n msNwUZ nq| wewμqvi P, Q, R I S Gi Rb ̈ wb‡Pi †Kvb μgwU mwVK? P + H2O Maltase  Q; Q Zymase  R + 2CO2; R + Q2 Aceto-bacter  S + H2O [CKRUET 22-23] [Medium] C6H12O6, C12H22O11, C2H5OH, CH3OH C12H22O11, C6H12O6, C2H5OH, CH3COOH C12H22O11, C6H11O5, C2H5OH, CH3OH C11H22O11, C6H11O5, C2H5OH, CH3OH C11H22O11, C6H11O5, C2H5OH, CH3COOH DËi: C12H22O11, C6H12O6, C2H5OH, CH3COOH e ̈vL ̈v: gë wf‡bMvi c×wZ‡Z wf‡bMvi cÖ ̄‘wZ: A ̈vj‡Kvnj Drcv`b: C12H22O11 + H2O Bbfvi‡Um/my‡μvR  37C C6H12O6 + C6H12O6 wPwb (my‡μvR) (Møy‡KvR + d«z‡±vR = BbfvU© wPwb) 2C6H12O6 RvB‡gm  20C – 24C 4CH3 – CH2 – OH + 4CO2 BbfvU© wPwb B_vbj
Kg©gyLx imvqb  Engineering Practice Sheet .................................................................................................................... 3 A ̈vwm‡Uv e ̈vKUi iƒcvšÍi ev A ̈vwmwUK GwmW Drcv`b: CH3CH2OH(10%) + O2 A ̈vwm‡Uv-e ̈vKUi  CH3COOH + H2O B_vbj A ̈vwmwUK GwmW (6%) gvB‡KvWvg©v A ̈vwmwU: CH3CH2OH(10%) + O2 gvB‡KvWvg©v A ̈vwmwU  35C CH3COOH + H2O A ̈vwmwUK GwmW (10%) 2. EDTA GKwU wK‡jwUs G‡R›U hv AvšÍR©vwZKfv‡e Aby‡gvw`Z dzW wcÖRvi‡fwUf| GwU Fe2+, Fe3+, Co3+ BZ ̈vw` Avq‡bi mv‡_ mwbœ‡ek eÜb Øviv Ave× n‡Z cv‡i| EDTA Avq‡b KZwU wbtm1⁄2 B‡jKUab hyMj Av‡Q? [CKRUET 22-23] [Hard] 2 3 4 5 6 DËi: 6 e ̈vL ̈v: EDTA (Ethylene di-amine tetra acetate)| GwU 4 wU Aw·‡Rb I 2 wU N cigvYy ̄’ †gvU 6 †Rvov gy3 B‡jKUab w`‡q Ae ̄’všÍi avZz Fe2+, Fe3+, Co3+ cÖf...wZ Avq‡bi mv‡_ 6 wU mwbœ‡ek eÜb Øviv hy3 n‡q wK‡jwUs wμqv K‡i Ges †ZjPwe©i cPb †iva K‡i| –OOC–H2C –OOC–H2C N–CH2–CH2–N .. .. CH2–COO– CH2–COO– weMZ mv‡j KUET-G Avmv cÖkœvejx 1. `y‡a cÖvK...wZK Bgvjwmdvqvi wn‡m‡e †KvbwU _v‡K? [KUET 17-18] [Medium] j ̈v‡±vR Pwe© †cÖvwUb M ̈vjv‡±vR d«z‡±vR DËi: †cÖvwUb e ̈vL ̈v: `y‡ai cÖv_wgK Bgvjwmdvqvi n‡jv †Kwmb; hv GK ai‡Yi †cÖvwUb| Engineering Standard Practice Problems PRACTICE (WRITTEN) 1. dzW cqRwbs Kx? [Easy] mgvavb: Lv‡` ̈ Uw·b wgwkÖZ nIqv‡K dzW cqRwbs ejv nq| 2. Thermogenesis ej‡Z Kx eyS? [Easy] mgvavb: GKRb e ̈w3 Lv` ̈ MÖnY Ki‡j Lv‡` ̈i Af ̈šÍixY `n‡bi d‡j kw3 wegy3 nq| d‡j BMR-Gi gvb e„w× cvq| GiB bvg Zvc Drcv`b ev Thermogenesis| 3. †cÖvwUb Kx? Avwgl RvZxq Lv‡` ̈i cÖavb KvR Kx? [Easy] mgvavb: †cÖvwUb n‡jv GK cÖKvi e„nr •Re AYy wKsev e„n`vYy, hv GK ev GKvwaK `xN© A ̈vwg‡bv GwmW wb‡q MwVZ| Avwgl RvZxq Lv‡` ̈i cÖavb KvR: †`‡ni e„w× mvab I ÿq c~iY Kiv| 4. wfUvwgb A I wfUvwgb B1 Kx bv‡g cwiwPZ Ges G‡`i Lv‡` ̈i Drm Kx? [Medium] mgvavb: wfUvwgb A Ô†iwUbjÕ bv‡g cwiwPZ| Lv‡` ̈i Drm: gvQ, wWg, gvLb BZ ̈vw`| Avevi, wfUvwgb B1Ô_vqvwgbÕ bv‡g cwiwPZ| Lv‡` ̈i Drm: ev`vg, `ya| 5. `ywU KxUbvkK Gi bvg †jL I MvVwbK ms‡KZ A1⁄4b Ki| [Hard] mgvavb: M ̈vgvw·b, DDT| Cl C Cl l Cl Cl Cl (M ̈vgvw·b) Cl CH – CCl3 Cl (DDT) 6. dzW wcÖRvi‡fwUfm Kx? GwU Kq ai‡bi? [Easy] mgvavb: dzW wcÖRvi‡fwUfm n‡jv †mmKj cÖvK...wZK ev ivmvqwbK c`v_© hv Aí cwigv‡b Lv` ̈e ̄‘i mv‡_ wgwk‡q Lv` ̈e ̄‘‡K dvsMvm I e ̈vK‡Uwiqvi AvμgY A_ev Lv` ̈e ̄‘i GbRvB‡gi cÖfv‡e cPb †iva Kiv hvq| GwU cÖavbZ `yÕcÖKvi: (1) cÖvK...wZK dzW wcÖRvi‡fwUfm (2) K...wÎg dzW wcÖRvi‡fwUfm| 7. wKDwis Kx? [Easy] mgvavb: Lv` ̈`ae ̈‡K Lvevi jeY (NaCl) ev Gi Mvp NbgvÎvi `aeY Øviv msiÿY Kivi cÖwμqv‡K wKDwis e‡j| 8. A ̈vw›U Aw·‡W›U Kx? K‡qKwU A ̈vw›UgvB‡μvweqvj wcÖRvi‡fwUf Gi D`vniY `vI| [Easy] mgvavb: †hme c`v_© †Zj, Pwe© ev wjwcW RvZxq Lv` ̈ Dcv`v‡bi evqy Øviv RviY ev Av`a© we‡kølY eÜ K‡i cPb †iva K‡i Zv‡`i A ̈vw›U Aw·‡W›U e‡j| K‡qKwU A ̈vw›U gvB‡μvweqvj wcÖRvi‡fwUf n‡jv: NaHSO3, KHSO3, NaNO2, NaNO3, COOH
4 ....................................................................................................................................  Chemistry 1st Paper Chapter-5 9. BHT, BHA, TBHQ I PG Gi c~Y©iƒc wjL Ges MvVwbK ms‡KZ A1⁄4b Ki| [Medium] mgvavb: BHT: Butylated hydroxytoluene BHA: Butylated hydroxy anisole TBHQ: Tertiary-Butyl hydroquinone PG: Propyl gallate MvVwbK ms‡KZ: O – CH3 OH C(CH3)3 (BHA) OH CH3 C(CH3)3 (BHT) (CH3)3C OH OH (TBHQ) OH C(CH3)3 OH OH COOC3H7 (PG) 10. Av‡Li im †_‡K gë wf‡bMvi cÖ ̄‘Z cÖYvwj wewμqvmn e ̈vL ̈v Ki| [Medium] mgvavb: C12H22O11 + H2O Bbfvi‡Um  37C C6H12O6 + C6H12O6 my‡μvR Møy‡KvR d«y‡±vR 2C6H12O6 RvB‡gm  20 – 24C CH3CH2OH + 4CO2 B_vbj CH3CH2OH + O2 gvB‡KvWvg©v  A ̈vwmwU 35C CH3COOH + H2O B_vbwqK GwmW Bbfvi‡Um GbRvB‡gi cÖfv‡e Av‡Li i‡m _vKv my‡μvR/wPwb Av`a©we‡køwlZ n‡q Møy‡KvR I d«z‡±v‡R cwiYZ nq| GB Møy‡KvR I d«z‡±vR‡K BbfvU© wPwb e‡j| GB BbfvU© wPwb RvB‡gm GbRvB‡gi Dcw ̄’wZ‡Z dv‡g©‡›Ukb cÖwμqvq B_vbj I Kve©b WvB A·vB‡W cwiYZ nq| B_vbj‡K cieZx©‡Z gvB‡KvWvg©v A ̈vwmwU bvgK e ̈vK‡Uwiqvi Dcw ̄’wZ‡Z RvwiZ K‡i B_vbwqK Gwm‡W cwiYZ Kiv nq| GB B_vbwqK Gwm‡Wi 6 – 10% Rjxq `aeY‡K wf‡bMvi e‡j| 11. wf‡bMvi e ̈env‡i Lv` ̈ `ae ̈ c‡P bv †Kb? [Medium] mgvavb: wf‡bMv‡ii g‡a ̈ 6 – 10% B_vbwqK GwmW _vKvq gva ̈‡gi cÖK...wZ A¤øxq nq| gva ̈‡gi pH gvb 4 Gi wb‡P †b‡g Av‡m| wf‡bMv‡i 5% B_vbwqK GwmW _vK‡j pH Gi gvb nq 2.4| gva ̈‡gi G pH gvb e ̈vK‡Uwiqvi e„wׇK cÖwZnZ K‡i Ges Lv` ̈ `ae ̈‡K cP‡bi nvZ †_‡K iÿv K‡i| GQvov wf‡bMvi wcKwjs cÖwμqvq Lv` ̈ `a‡e ̈i Pviw`‡K GK cÖKvi cvZjv ̄Íi m„wó K‡i hv †f` K‡i e ̈vK‡Uwiqv Lv‡` ̈ cÖ‡ek Ki‡Z cv‡i bv| •Re Lv‡` ̈i Av`a© we‡køl‡Y GbRvBg cÖfve‡Ki f~wgKv cvjb K‡i| GbRvBg †cÖvwUb AYy| GbRvB‡g Dcw ̄’Z A ̈vwg‡bv g~jK (– NH2) Gi mv‡_ wf‡bMv‡ii †cÖvUb (H+ ) mn‡RB hy3 nq| d‡j GbRvBg Lv‡` ̈i Dcv`v‡bi mv‡_ hy3 n‡q AšÍe©Zx© †hŠM MVb Ki‡Z cv‡i bv| ZvB Lv` ̈`ae ̈ cPb n‡Z iÿv cvq| 12. GwRs Gi mgq hZ †ewk nq, wf‡bMv‡ii ̄^v` I MÜ ZZ fv‡jv nq †Kb? [Hard] mgvavb: wf‡bMvi n‡jv 6 – 10% (w/v) B_vbwqK Gwm‡Wi Rjxq `aeY| e ̈vK‡Uwiqvi Dcw ̄’wZ‡Z B_vbj‡K Aw·‡Rb Øviv RvwiZ K‡i B_vbwqK Gwm‡W cwiYZ Kiv nq| CH3CH2OH + O2 gvB‡KvWvg©v A ̈vwmwU  CH3COOH + H2O O2 Gi cwigvY Kg n‡j Am¤ú~Y© RviY N‡U| d‡j B_vb ̈vj (CH3 – CHO) Drcbœ nq| Drcbœ B_vbwqK GwmW‡K 6 – 10% gvÎvq cwiYZ K‡i cv‡Îi g‡a ̈ cÖvq wZb gv‡mi gZ mgq a‡i AÜKv‡i †i‡L †`qv nq GB cÖwμqv‡K GwRs e‡j| cÖv_wgKfv‡e •Zwi Kiv wf‡bMvi wKQzUv wZ3 ̄^v` I A ̈vwmwUK MÜhy3 nq| wZ3 ̄^v` `~i KivI A ̈vwmwUK MÜ `~i K‡i wf‡bMv‡ii ̄^v` I eY© wVK ivLvi Rb ̈ `xN© mgq w ̄’i Ae ̄’vq †i‡L †`Lvi cÖ‡qvRb nq| wf‡bMvi `xN© mgq w ̄’i _vKvi Kvi‡Y m~2 KYv ̧‡jv `aeY †_‡K c„_K n‡q wb‡P Zjvwb wn‡m‡e c‡o| d‡j wf‡bMvi Av‡iv cwi ̄‹vi I ̄^”Q nq| Am¤ú~Y© Rvi‡Yi d‡j Drcbœ B_vb ̈vj RvwiZ n‡q B_vbwqK Gwm‡W cwiYZ nq| G Rb ̈ GwRs Gi mgq hZ †ewk nq, wf‡bMv‡ii ̄^v` I MÜ ZZ DrK...ó gv‡bi nq| PRACTICE (MCQ) 1. dj cvKv‡bvi Rb ̈ e ̈envi Kiv nqÑ [Easy] CaC2 SSP NaHSO3 EDTA DËi: CaC2 2. †`‡ni e„w× mvab I ÿqc~iY K‡i †Kvb Lv` ̈ Dcv`vb? [Easy] kK©iv Avwgl wfUvwgb LwbR jeY DËi: Avwgl 3. DAP Gi ms‡KZ †KvbwU? [Medium] (NH4NO3) [(NH4)2HPO4] KNO3 [(NH4)2SO4] DËi: [(NH4)2HPO4] 4. wb‡Pi †KvbwU Bb‡mKwUmvBW? [Medium] GwÛab A ̈v‡gvwbqvg mvj‡dU TSP KNO3 DËi: GwÛab