[blogtoanli.net]Đề thi thử môn Hóa lần 1 - Đỗ Thành Giang

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LUYN THI I HC 2014

THI TH S 01 ( thi c 06 trang)

THI TH TUYN SINH I HC NM 2014

Mn: HA HC; Khi A Thi gian lm bi: 90 pht, khng k thi gian pht

H, tn th sinh: S bo danh:.

Cho bit khi lng nguyn t (theo vC) ca cc nguyn t: H = 1; C = 12; N = 14; O = 16; Na = 23; Mg = 24; Al = 27; S = 32; Cl = 35,5; K = 39; Ca = 40;

Cr = 52; Mn = 55; Fe = 56; Cu = 64; Zn = 65; Ag = 108, Ba = 137.

I. PHN CHUNG CHO TT C TH SINH (40 cu, t cu 1 n cu 40)

Cu 1: Tripeptit X v tetrapeptit Y u mch h. Khi thy phn hon ton hn hp gm X v Y ch to ra mt amino axit duy nht c cng thc H2NCnH2nCOOH. t chy 0,05 mol Y trong oxi d, thu c N2 v

36,3 gam hn hp gm CO2, H2O. Cho 0,01 mol X tc dng vi dung dch cha 0,05 mol NaOH, c cn dung

dch sau phn ng thu c m gam cht rn. Gi tr m l

A. 3,33. B. 3,41. C. 3,71. D. 4,13.

Cu 2: Hn hp T gm 2 cht hu c X v Y (ch cha C, H , O) u cha 53,33% oxi v khi lng. Khi lng phn t ca Y gp 1,5 ln khi lng phn t X. Bit t chy 0,02 mol T th cn 0,05mol oxi. Nu cho 0,02 mol T tc dng va vi NaOH th thu c bao nhiu gam mui, (bit khi lng mui to t Y gp 1,647 ln khi lng mui t X)? A. 2,7. B. 3,6. C. 4,5. D. 1,8.

Cu 3: Cho phn ng sau thc hin 302 C: 2HI (k) H2(k) + I2(k) Khi tng p sut ln 2 ln th tc phn ng thay i nh th no? A. tng 4 ln. B. gim 2 ln. C. gim 4 ln. D. Tng 2 ln. Cu 4: Pht biu no di y khng ng ?

A. Cr2O3 , Al2O3, ZnO u tc dng c vi dung dch NaOH long, un nng. B. NaCl, NaOH, CH3COONa u l cht in ly. C. SiO2, CO2, NO2 u l oxit axit. D. Al(OH)3, Sn(OH)2, Pb(OH)2, u l cht lng tnh.

Cu 5 Cho cc polime sau: thy tinh hu c, t olon, t lapsan, poli (vinyl axetat), poli etilen, t capron, caosu buna-S, t nilon-6,6. S polime c iu t phn ng trng hp (hoc ng trng hp) l A. 7. B. 6. C. 4. D. 5.

Cu 6: Pht biu ng l A. Tro thc vt l loi phn ln. B. nh gi dinh dng ca phn kali da vo % khi lng ca kali. C. Amophot l mt loi phn phc hp, gm (NH4)2HPO4 v NH4H2PO4. D. Cng thc ca phn ure l (NH4)2CO3.

Cu 7: C cc th nghim sau: (1) Nh nc brom d vo dung dch axit fomic. (2) Nh axit clohidric vo dung dch st (II) nitrat. (3) Cho ure vo dung dch bari hiroxit. (4) Cho kali penmanganat vo axit clohidric c. (5) Cho tinh th Natri clorua vo axit sunfuaric c un nng (250 C).

S th nghim sinh ra kh l A. 4. B. 3. C. 2. D. 5.

M thi 210


Cu 8: Cho cc nguyn t: K (Z = 19), N (Z = 7), Si (Z = 14), Mg (Z = 12). Dy gm cc nguyn t c sp xp theo chiu gim dn m in t tri sang phi l: A. K, Mg, Si, N. B. K, Mg, N, Si. C. Mg, K, Si, N. D. N, Si, Mg, K.

Cu 9: Hn hp X gm mt axit hu c A no, mch h, hai ln axit v mt axit B khng no (c mt ni i), mch h, n chc. S nguyn t cacbon trong cht ny gp i cht kia. t chy hon ton 5,08 gam hn hp X c 4,704 lt kh CO2 (ktc). Nu trung ha ht 5,08 gam X cn 350 ml dung dch NaOH 0,2M c hn hp mui Y. Phn trm khi lng ca A, B ln lt l: A. 40,94% v 59,06% . B. 55,00% v 45,00%. C. 37,5% v 62,5%. D. 57,48% v 42,52%.

Cu 10: Nung nng m gam hn hp gm Al v FexOy trong iu kin khng c khng kh. Sau khi phn

ng xy ra hon ton, thu c hn hp rn X. Cho X tc dng va dung dch cha 1 mol NaOH, sau

phn ng thot ra 6,72 lt kh H2 ( ktc). Cht rn X tc dng vi dung dch H2SO4 long d th thu c

26,88 lt H2 (ktc). Gi tr m l

A. . 96,6. B. 73,4. C. 57,0. D. 91,2.

Cu 11: C cc th nghim sau:

(a) Sc kh H2S vo dung dch cha KMnO4 v dung dch H2SO4 long.

(b) Cho bt Ag vo bnh cha kh O3.

(c) Cho bt Si vo dung dch NaOH.

(d) t mu Mg trn n cn ri cho vo bnh cha kh CO2.

(e) Nh dung dch HCl m c vo nc giaven.

(f) Nh dung dch HCl vo dung dch Na2S2O3.

(g) Cho bt Fe2O3 vo dung dch HI d.

S th nghim sinh ra n cht l

A. 5. B. 6. C. 7. D. 4.

Cu 12: Nguyn t ca nguyn t X c tng s electron trn phn lp s l 7. X khng th l nguyn t no

di y ?

A. K (Z = 19). B. Fe (Z = 26). C. Cu (Z = 29). D. Cr (Z = 24).

Cu 13: Hn hp A gm 0,13 mol C2H2 v 0,18 mol H2. Cho A qua Ni nung nng, phn ng khng hon ton v thu c hn hp kh B. Cho B qua 200 ml dung dch Br2 1M,sau khi xy ra phn ng hon ton thy c hn hp kh X gm 0,06 mol C2H6 v 0,02 mol H2 thot ra. Nng dung dch brom lc sau l:

A. 0,250. B. 0,375. C. 0,750. D. 0,500.

Cu 14: Cho s phn ng sau:

CH2=CH-CH=CH2 + HBr t l mol 11 80oC X (sn phm chnh)

(CH3)2CH-CHBr-CH3 + KOH to,xt C2H5OH Y (sn phm chnh)

Tn gi ca X, Y ln lt l

A. 1-Brombut-2-en, 2-metylbut-2-en. B. 3-Brombut-1-en, 2-metylbut-2-en.

C. 1-Brombut-2-en, 3-metylbut-1-en. D. 3-brombut-1-en, 3-metylbut-1-en.

Cu 15: Nung nng hn hp X cha 15,8 gam KMnO4 v 24,5 gam KClO3 mt thi gian c 36,3 gam hn hp Y gm 6 cht. cho Y tc dng vi dung dch HCl c d un nng, lng kh clo sinh ra hp th hon ton vo 300 ml dung dch NaOH 5M un nng c dung dch Z. Cc phn ng xy ra hon ton. Khi lng cht rn khan thu c khi c cn Z l

A. 12,0 gam. B. 79,8 gam. C. 91,8 gam. D. 111,0 gam. Cu 16: Cho dy cc cht v ion sau: C, Si, Cl2, F2, Cr

3+, Zn, NO2, SO2. S cht v ion va c tnh oxi ha va c tnh kh l A. 5. B. 7. C. 4. D. 6.

Cu 17: Pht biu khng ng l : A. Valin l aminoaxit c 5 nguyn t cacbon trong phn t. B. Keratin l protein hnh si, khng tan trong nc.


C. C th to c ti a 4 ipeptit mch h t H2N-CH2-CH2-COOH v H2N-CH2-COOH. D. Axit nucleic l polieste ca axit photphoric vi pentozo .

Cu 18: Dung dch X c cha m gam cht tan gm Na2CO3 v NaHCO3. Nh t t 0,3 mol HCl n ht vo dung dch X th sau phn ng thu c dung dch Y v thot ra 0,1 mol kh CO2. Nh nc vi trong n d vo dung dch Y th c 40 gam kt ta. Gi tr m l A. 46,4. B. 38,0. C. 39,1. D. 48,6.

Cu 19: Ly m gam K cho tc dng vi 500ml dung dch HNO3 thu c dung dch M v thot ra 0,336 lt hn

hp N (ktc) gm 2 kh X v Y. Cho thm vo M dung dch KOH d th thy thot ra 0,224 lt kh Y. Bit rng qu trnh kh HNO3 ch to mt sn phm duy nht. Gi tr m l A. 7,80 gam. B. 6,63 gam. C. 12,48 gam. D. 3,12 gam.

Cu 20: Cho cc cht sau: Na2CO3, Na3PO4, NaOH, HCl. S cht lm mm c nc cng vnh cu l A. 3. B. 2. C. 4. D. 1.

Cu 21: Cho 0,15 mol mt aminoaxit X mch h phn ng va 150 ml dung dch HCl 1M, sau phn ng thu c dung dch Y, dung dchY tc dng va vi 300 ml dung dch NaOH 1M, c cn dung dch c 29,625 gam cht rn. % Khi lng nguyn t nito c trong X l

A. 18,67%. B. 15,73% C. 11,96%. D. 9,52%.

Cu 22: C cc pht biu sau: (1) Thy phn cht bo trong mi trng kim lun thu c glixerol. (2) Triolein l cht bo lng iu kin thng, c cng thc l C3H5(COOC17H33)3. (3) Du thc vt v du ha ging nhau l ucha C, H, O v u khng tan trong nc. (4) Axit bo l cc axit no, mch h, n chc, c mch cacbon khng phn nhnh c s cacbon chn. (5) Isoamyl axetat l este no, n chc, mch h c hng v mi chui chn. (6) Phn ng thy phn este no, n chc , mch h trong mi trng axit lun l phn ng thun nghch.

S pht biu ng l A. 4. B. 5. C. 6. D. 3.

Cu 23: un nng 6,0 gam CH3COOH vi 6,0 gam C2H5OH (c H2SO4 lm xc tc, hiu sut phn ng este ho bng 50%). Khi lng este to thnh l A. 4,4 gam. B. 8,8 gam. C. 5,2 gam D. 6,0 gam.

Cu 24: Cho 100ml dung dch NaOH 0,01M vo 100ml dung dch HCl 0,03 M, thu c dung dch X c gi tr pH bng A. 1. B. 2. C. 13. D. 12.

Cu 26: Cho m gam cht rn X gm Mg v Fe phn ng va vi 100ml dung dch HCl 1,5M v CuCl2 1,25M, sau phn ng thu c m gam cht rn. % Khi lng Mg c trong X l A. 70%. B. 30%. C. 60%. D. 40%.

Cu 27: C cc pht biu sau (1) Stiren, etilen, toluen u lm mt mu thuc tm nhit thng. (2) Naphtalen, phenol, anilin tham gia phn ng th brom d hn benzen. (3) ng phn l nhng cht c cng cng thc phn t nhng khc nhau v cu to ha hc. (4) Cc phn ng hu c thng xy ra nhanh v khng theo mt hng xc nh. (5) Cc hp cht hu c nht thit phi cha cacbon v hidro. (6) Glixerol, axit fomic, etanol u tan v hn trong nc.

S pht biu ng l A. 2. B. 4. C. 5. D. 3.

Cu 28: Cho s phn ng sau: C5H10O C5H10Br2O C5H9Br3 C5H12O3 + C8H12O6.

Cu 25: X v Y l hai cht lng c chit tch nh hnh v bn. X v Y c th l A. Phenol v etanol. B. Etanol v phenol.

C. Benzen v nc. D. Nc v Benzen.


Bit C5H10O l ancol bc 3, mch h. X l A. Axit fomic. B. Ancol popylic. C. Axit propionic. D. Ancol metyic.

Cu 29: Ha tan ht m gam Fe3O4 vo dung dch HCl, sau phn ng thu c dung dch X. Nh AgNO3 ti d vo dung dch X, th thu c 0,056 lt kh NO (sn phm kh duy nht ca N+5, ktc) v 13,185 gam kt ta. Gi tr m l

A. 3,48. B. 4,64. C. 5,80. D. 2,32.

Cu 30: Ha tan 8 gam hn hp X gm Mg v Cu vo H2SO4 long d, sau khi phn ng xy ra hon ton thu c 2,24 lt kh ( ktc). % Khi lng Cu c trong X l A. 70%. B. 50%. C. 20%. D. 30%.

Cu 31: Cho 6,5 gam Zn vo 100ml dung dch gm AgNO3 0,4M v Cu(NO3)2 1M, sau khi phn ng xy ra hon ton thu c m gam cht rn. Gi tr m l A. 10,72. B. 6,24. C. 7,52. D. 9,44.

Cu 32: Pht biu khng ng v cacbohidrat l A. Saccaroz ch tn ti di dng mch vng. B. Nh dung dch AgNO3 trong NH3 vo dung dch glucoz hoc fructoz (un nng) u to kt ta. C. Xenluloz trinitrat l mt loi t nhn to. D. Trong phn t amiloz ch cha 1 loi lin kt -1,4-glicozit.

Cu 33: Dy gm cc cht c sp xp theo chiu tng dn nhit si t tri sang phi l: A. CH3COOH, HCOOH, C2H5OH, CH3CHO. B. HCOOH, CH3COOH, C2H5OH, CH3CHO.

C. CH3COOH, C2H5OH, HCOOH, CH3CHO. D. CH3CHO, C2H5OH, HCOOH, CH3COOH.

Cu 34: C cc pht biu sau v phenol (C6H5OH). (1) Phenol c s dng iu ch TNT v cht dit nm mc. (2) Phenol tan t trong etanol, nhng tan nhiu trong nc nng. (3) Nh dung dch axit clohiric vo dung dch natri phenonat thy xut hin vn c. (4) Nguyn t hiro trn vng benzen ca phenol d th hn nguyn t hiro ca benzen. (5) nh hng ca gc phenyl ln nhm hidroxyl th hin qua phn ng th brom.

S pht biu ng l A. 2. B. 3. C. 5. D. 4.

Cu 35: C hai bnh in phn (1) v bnh in phn (2) .Trong bnh 1 ng dung dch (1) l NaOH c th tch 38 ml v nng 0,5M. Trong bnh 2 cha dung dch gm 2 mui Cu(NO3)2 v NaCl tng khi lng cht tan 258,2 gam. Mc ni tip bnh (1) v bnh (2). in phn cho n khi bnh (2) va c kh thot ra c hai in cc th dng li. Ly dung dch sau phn ng : - bnh (1): nh lng xc nh thy nng NaOH sau in phn l 0,95M. - bnh (2) em phn ng vi lng d bt Fe. Sau phn ng khi lng bt Fe b tan ra l m gam, v thot ra mt kh duy nht l NO c th tch x (lt) c o iu kin tiu chun. Gi tr ca m v x ln lt l:

A. 11,2 v 4,48. B. 11,2 gam v 6,72. C. 16,8 v 4,48. D. 7,47 gam v 2,99.

Cu 36: Nh 0,45 mol Ba(OH)2 vo dung dch c cha a mol H2SO4 v 2a mol ZnSO4 , sau khi phn ng xy ra hon ton thu c 74,85 gam kt ta. Gi tr a l A. 0,20. B. 0,05. C. 0,30. D. 0,10.

Cu 37: Cho hn hp X gm hai este mch h l ng phn ca nhau. Ly 0,2 mol X cho phn ng hon ton vi 0,3 mol NaOH, ri c cn thu c phn hi c cha 8,5 gam hn hp 2 ancol ng ng k tip nhau v cht rn Z. Nung Z trong oxi d n khi phn ng hon ton th thu c 22 gam CO2 v 7,2 gam H2O v mt lng Na2CO3. Cng thc cu to ca 2 este l

A. C2H5COOC3H7 v C3H7COOC2H5. B. C2H5COOC2H5 v C3H7COOCH3. C. C2H3COOC2H4 v C3H5COOCH3. D. C3H5COOC2H5 v C4H7COOCH3.

Cu 38: t chy hon ton m gam 3 ancol thuc cng dy ng ng, sau phn ng thu c 15,68 lt kh CO2 (ktc) v 19,8 gam H2O. Nu tch nc hon ton m gam 3 ancol trn th thu c ti a bao nhiu gam ete?

A. 9,8. B. 17,0. C. 15,2. D. 13,4.

Cu 39: Dy gm cc kim loi c mng tinh th lp phng tm khi l


A. Ca, Ba, Mg. B. Na, Rb, Ba. C. Ca, Na, K. D. Li, Na, Mg.

Cu 40: Hn hp X gm anehit n chc Y v anehit n chc Z (bit Z c khng qu 4 lin kt trong phn t). Cho 0,18 mol hn hp X nng 7,4 gam tc dng hon ton vi AgNO3 d trong dung dch NH3 thu c 77,92 gam kt ta. % Khi lng ca Z trong X l A. 56,76%. B. 43,24%. C. 60,81%. D. 39,19%.

II. PHN RING [10 cu] Th sinh ch c lm mt trong hai phn (phn A hoc phn B) A. Theo chng trnh chun (10 cu, t cu 41 n cu 50)

Cu 41: Cho cc oxit sau: BaO, Al2O3, ZnO, MgO, Fe2O3, CuO. C bao nhiu oxit c th b kh bi CO (un nng) ?

A. 2. B. 3. C. 4. D. 5. Cu 42: Cho m gam hn hp X gm anehit axetic, anehit acrylic, anehit oxalic tc dng vi lng d AgNO3 trong NH3 thu c 69,12 gam Ag. Mt khc t chy hon ton m gam hn hp X th thu c 0,66 mol CO2 v 0,49 mol H2O. Gi tr m l A. 14,02. B. 19,42. C. 13,62. D. 17,22.

Cu 43: Pht biu khng ng l: A. Trong cc axit, ch axit fomic tham gia phn ng trng Ag. B. Axit acrylic, axit oleic u lm mt mu nc brom. C. Lc axit tng dn theo th t Cl2CHCOOH, ClCH2COOH, CH3COOH. D. Trong cng nghip iu ch axit axetic t ancol metylic.

Cu 44: Cho 6,4 gam CH3OH bng O2 (xc tc) thu c 10,4 gam hn hp X gm anehit , axit, ancol d v nc. Hn hp X tc dng vi Na d sinh ra 3,36 lt H2 (ktc). Cho hn hp X tc dng vi dung dch AgNO3 d trong NH3 th thu c m gam kt ta. Gi tr m l A. 108,0. B. 32,4. C. 43,2. D. 21,6.

Cu 45: em nung hn hp A cha x mol Fe v 0,15 mol Cu trong khng kh mt thi gian thu c 63,2 gam hn hp B Ha tan ht B bng dung dch H2SO4 c, nng d th thu c 0,3 mol SO2 (sn phm kh duy nht). gi tr ca x l A. 0,5. B. 0,6. C. 0,7. D. 0,4.

Cu 46: t chy 1 mol hn hp X gm amin no, hai chc mch h Y v hidrocacbon Z thu c 2 mol hn hp kh gm N2 v CO2, v 2,5 mol H2O (bit s mol ca Z nh hn s mol Y). Z l A. CH4. B. C2H2. C. C3H4. D. C2H4.

Cu 47: Pht biu khng ng l A. Nc kh c cng thc l CO2 , c s dng p lnh thc phm. B. NO3

-, CO32-, SO4

2- u l cc anion gy nhim mi trng nc. C. CO2, CFC u l nhng kh chim vai tr ln gy ra hiu ng nh knh. D. Phn chua c cng thc l K2SO4.Al2(SO4)3.24H2O dng thuc da, lm trong nc, cm mu.

Cu 48: Hn hp kh X gm O2 v O3 c t khi so vi H2 l 19. Hn hp Y gm propan, propen v

propin, t khi Y so vi H2 l 21,5. Khi t chy hon ton 0,2 mol Y cn ti thiu a mol X. Gi tr a l

A. 0,5. B. 0,6. C. 0,8. D. 0,4. Cu 49: Cho phng trnh phn ng sau: Al + HNO3 Al(NO3)3 + N2O + N2 + H2O Bit t khi ca hn hp X gm N2O v N2 so vi H2 l 17,2. Sau khi cn bng vi h s nguyn ti gin th h s ca phn t HNO3 l

A. 168. B. 142. C. 152. D. 88. Cu 50: C cc pht biu sau: (1) Zn c th kh c Cr3+ trong H+ thnh Cr2+. (2) Nh dung dch NaOH vo dung dch Na2Cr2O7 th dung dch t mu vng chuyn sang mu cam. (3) P, S, C t bc chy khi tip xc vi CrO3. (4) Oxi ha Cr3+ bng Br2 trong mi trng kim s thu c Cr2O7

2-.


(5) Nh dung dch BaCl2 vo dung dch Na2CrO4 cho kt ta mu vng . S pht biu ng l A. 4. B. 3. C. 5. D. 2.

B. Theo chng trnh nng cao (10 cu, t cu 51 n cu 60) Cu 51: un nng hn hp gm 1 mol HCOOH, 1 mol CH3COOH v 2 mol C2H5OH c H2SO4 c xc tc toC (trong bnh kn dung tch khng i) n trng thi cn bng th thu c 0,6 mol HCOOC2H5 v 0,4 mol CH3COOC2H5. Nu un nng hn hp gm 0,8 mol HCOOH, 2 mol CH3COOH v a mol C2H5OH iu kin nh trn n trng thi cn bng th thu c 0,3 mol HCOOC2H5. S mol este CH3COOC2H5 thu c l A. 1,92. B. 1,29. C. 8/19. D. 997/1000. Cu 52: Hn hp M gm 2 axit cacboxylic X v Y (ch cha chc axit, MX < MY). t chy hon ton 0,1 mol M thu c 0,2 mol CO2. em 0,1 mol M tc dng vi NaHCO3 d thu c 4,032 lt CO2 ( ktc). Bit M khng tham gia phn ng trng bc. Phn trm khi lng ca Y trong M l

A. 66,67%. B. 40%. C. 20%. D. 85,71%.

Cu 53: Hn hp M gm axit axetic v anehit X. t chy hon ton m gam M cn dng va 0,13 mol O2, sinh ra 0,1 mol CO2 v 0,1 mol H2O. Cho ton b lng M vo lng d dung dch AgNO3 trong NH3, sau khi phn ng kt thc thu c 0,04 mol Ag. Cng thc ca X l

A. C3H7CHO. B. HCHO. C. CH3CHO. D. C2H5CHO.

Cu 54: C bao nhiu hidrocacbon th kh cho phn ng vi AgNO3 trong NH3 ? A. 2. B. 3. C. 4. D. 5.

Cu 55: Cho Zn ti d vo dung dch gm HCl ; 0,05 mol NaNO3 v 0,1 mol KNO3. Sau khi phn ng kt thc thu c dung dch X cha m gam mui, 0,125 mol hn hp kh Y gm hai kh khng mu, trong c mt kh ha nu trong khng kh, t khi ca Y so vi H2 l 12,2. Gi tr m l

A. 61,375. B. 64,050. C. 57,975. D. 49,775.

Cu 56: C cc thuc th sau: Dung dch KMnO4, dung dch Br2/ CCl4, dung dch H2S, dung dch Ba(OH)2. Trong cc dung dch trn, c bao nhiu dung dch c th dng phn bit c CO2 v SO2 ?

A. 1. B. 2. C. 3. D. 4.

Cu 57: Ancol 2 chc X c cng thc l CnH2n+2 O2. Bit X c 5 cu to tha mn tnh cht ha tan c Cu(OH)2 cho dung dch xanh lam. Gi tr n l

A. 6. B. 3. C. 4. D. 5.

Cu 58: Pht biu no di y ng A. (CH3)2NH tc dng vi dung dch HNO2 nhit thng sinh ra kh N2. B. Mui inatri glutamat c s dng lm gia v thc n (m chnh). C. Phenylamoni clorua tan t trong nc. D. C7H9N (cha vng benzen) c 4 ng phn amin bc 1.

Cu 59: C cc pht biu sau (1) Sc NH3 ti d vo dung dch CuSO4 thu c kt ta xanh. (2) CuSO4 khan c s dng pht hin du v ca nc c trong cht lng. (3) Cho CrO3 tc dng vi H2O lun thu c hn hp axit. (4) Trong cc hp cht, crom c cc mc oxi ha t +1 n +6, nhng ph bin l +2, + 3, + 6. (5) Nguyn tc luyn gang thnh thp l kh cc nguyn t C, Si, P..c trong gang. (6) Pb khng tan trong HCl long v H2SO4 long.

S pht biu ng l A. 3. B. 4. C. 5. D. 6.

Cu 60: in phn dung dch gm 7,45 gam KCl v 28,2 gam Cu(NO3)2 (in cc tr, mng ngn xp) n khi khi lng dung dch gim i 10,75 gam th ngng in phn (gi thit lng nc bay hi khng ng k), thy thot ra V lit kh anot ( ktc). Gi tr V l

A. 1,68. B. 3,36. C. 2,24. D. 1,12.

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[blogtoanli.net]Đề thi thử môn Hóa lần 1 - Đỗ Thành Giang