đề thi hóa sát đại học 2012

4 TR[JSNG DAr FIQC KHTN Trwong THPT ChuY6n KHTN BAt K|EM TRA KIEN THIIC UlOtq HOn HQC LCvP 12'- 1112 Thdi gian ldm bdi: 90 phitt A/gty thi: 27-11-2011 Me da thi: 193 C. D. Ho vi t6n hqc sinh: ' t' ' illill cUuNG CHO rAr CA THi SINH (Tr) cdu I tliin cdu 40) . S ;;;^i, HJi"" rra" ho. p X go* r"Cr, vi cu vdo c6c nu6c, khu6y d6u cho phan irng Iioan todLn. sau. phin ring, lgc duo. c I gam chft ran kh6ig tan viiung dich Y. Digl pli6n dung dlch Y t6'i khi trong dung dlcli h6t Cl-, thi d anot thodt ra3,36lit lthf (rlktc). Sti gam h6n ho. p X ban d6u ld A. 16,25 gatn. , 8.17,25 gam. C' 19,45 gatn' D'20,45 gam' CiaZ: Hda tal NaCl vAo,ding dich f ftt, ZO'1, dt5n bao hda, sau d6 sqc khi COz du viLo dung @h, thu duo-c chAt X kiittua. V{Y X ld A. NaHCOr. B. NFI4HCO3. C' NazCO:' D' NFI4CI' I cau ;;;il;6,,g4 gamrrSn trqp x Srn etror, Fe3oa, cuo thdnh 2 phen lang nhau, PhAn 1 phan rlmg vta dri v6'i ;;;j;;"s d;h HiitM. ch" ;h4", phan une voi urso, lod'g vr)'a dri. s5 gam murii sunfat khan thu duec ld A +a3l ga?. il. st,ti gam. C' 54,62 gam' D' 61'64 gam' I CAu 4: Cho so'dd c6c Phin ri'ng sau: l)N, + Hz Fe'to , NHs 3) CH3COOH + C2H5O11 HzsQ+ t CH3COOC2H5 + H2O 2) SO2 + Oz -=r?C* SO: 4) CH3COOCzHs + NaOH + CH3COONa + C2H5OH Nhtng phan ri'ng c6 tinh chAt thuan nghich li ^ ,r \ ,^\ ,^\ . F i,^(r), I , 8 (1), (3). 'q.(t),9)r(3): . _ D'(1), (2)' (3)'(4)' Ceu s. CO.n6t h5n hgB khi X g6m etilln vi axetilen. N6u cho V lit khi X phzur irng v6'i dung dich AgNOslNHr du thi tao r,a9,6-g"t ['ct*". Lfrat ruta" n6u cho V_lit k]ri X.nhu tr6llhdn frng hct v6i dung dich brom thi khoi f"n"g binh du;g'tr'6ng dich brom tdngl;z gam Drit ch6y hSt V:lit.hdn h.o.p.khi I."e d6n sdn phAm ch6y viro c6c ,tiruiOO *l dulg aicn UaOH 1,5M thi mutii t4o thdnh frong dung dlch vi s6 mol thu drLo. c lii c ' ' A. NaHCO,r vi 0,15 mol. B. NazCOr vAi 0,075 mol. C. NazCO: vd 0,2 mol. D. h5n ho. p Na2CO3; 0,075 mol vi NaHCO: 0,15 mol. ,,CAu 6: Cho c6c Phin frng sau: l) NH4NO2 t+ ; 4) (NFIa)2Cr2O, -? !) Dun n6ng dung dich bdo hda NaNO2, NIl4Cl' ' 5) NH3 + CuO ' -5 '3)NH, + Cl2 +* 6)R-NH2 + HNOz + 56 phAn ri'ng t4o ra don chAt Nito'li ,.A. 6. " t ' \8. 5. c.4' D. 3. { Ca"7: Cho Q,1 mol CH3COOH vdo c6c chira 30ml dung dfch ROH 20% (d:I,2glm1, R ld mOt kirn lopi nh6m ial. C6 ca1 dung dich sau phan yng, r6i e6t chay hodn todn chAt rin khan cdn l4i. Sau khi ddt ch6y thi cdn 14i g,iqgam chdt r{ri vd c6 m eam1lol_h-o'p g6m COz, hoi rr16'1bav ra. Gi|tri cia rn lir A.7,54gam. B.8,26gim C'9,3gam- D'10,02gam' CAu 8: C6 2 anken X, Y la d6ng deng li6n ti6p nhau, trong d6 My > M1. Hidrat h6a h6n ho. p X, Y c6 HzSO+ lil , xric t6c,t4o rulh6n ho.p g6m 3 ancol. O6t ch6y hoirn todn 1,94 gam h6n haP ancol; thu duo.c 2,24litkhiCOz (dktc). Vay ./:\ A. yle but.2-en. B. X ld etilen. (C!Y lnpropen. D. Y Ie isobuten. Ce" ;; 11tn "fra, C,11eN tao k.lt tfia v6'i dung dlch nu6c'6ro*, Lhi pnan ,:tng v6i axit nitro kh6ng tao ra khi. ChAt JJ"Jtr'a if A. Anilirr. iB. C6H5-NHCH3. C. rn-Toluidin. D. Benzenamin CAu l0: Cho 2,76 gam ch6t hfi'u co- X phAn irng vila dri v6'i 30ml dung dich NaOH 2M. ChAt ndLo sau dAy th6a m6n tinh ch6t cfra X? q"" -' A" lCau l1: C6 rn6t h6n ho. p X g6m Al vd Fe. N6u cho h5n hqp X t5c dung htit v6'i dung dich NaOH du, t4o ra3,36 lit khi (dktc) Mat kh6c nOu "f,o h6n hop X t6c dpng h6t vO'i axit HCI du thi duoc 6,72 lit khi (dktc). Sd gam h6n ho. p X ban ddu li A. 8,3 gam. 8. 9,65 gam' C. 11,1 9n.' ,,,, r. rL D. 19,5 gam- Ciu 12: Co,lung dicli NaCl b6o hoa 6'350C. Cho qudng Xinvinit"vd6'rlungbich d6, dun s6i, r6i lgc t6ch riOng phAn kh6ng tan k"hi rtung diqh con nong. LAy phAn dung dich dem dti ngu6i t6'i 350C, du'oc chAt X ktlt tinh ld CHO A. NaCI B. i(cl C. MgC12. D. CaCl2 www.VNMATH.com www.VNMATH.com Cfru tJ: 6oa tan te(NU3)2 vdo nu6'c thdnh dung dich X c6 n6ng d6 0,iM. ThOm luo.ng du axit HCI ddc vdo X J6" tfti pliin ring hodn toin thu duo-c dung dich i. i'rong dung^dlch Y c6 chf'a cAc rnr-r6i li' A. Feclz. B. Fe(NO3): vd FeCl:. C' FeQ'{O3)2 vi FeCl2' D' FeCh' ^1 CAu 14: Kim lo4i phin ri'ng $uo-c v6iNito'6'ngay nhi6t d0 thud'ng li ' A' Li' B' I(' Na' c' Al' Mg' Ciu 15: Cho so d6 chuYdn h6a sau: Benzen*etilen axit, a zno,t., " +KMnor't. rh5nha-pZ *HCI du"'dt'> khiT "* T:l&, B.cFr, c. hdn hop co2 vd clz. D c6H5cooH. CAu 16: Cho rndi ch6t: K, B.a , Al, Zn,AlO:, ZnO viro dung dich NaOH. Nhtng chAt c6 phAn ri'ng v6'i dung dich NaOH ld \ A.Al, Zn,Al7O3,ZnO. B.Al,AlzOs. C.Al, Al2O3,ZnO. D.tAtc6c6cch6tddcho. TCao 17: Dun n6ng m garn hdn h-op co s6 mol bing nhau cta glucozcr, fructozol*accrozu', mantozo trong dung dich HzSO+ lodns, Sau phdn fi'ng th6m luo.1g du dung dicli AgNOTA{H3, t4o ra 12,96 gam Ag. Vay m c6 gi6 tri le A: 10,44 gdm; 8.7,02 gam. C. 5,22 gam. D. 5,04 gam' CAu 18: Cho CIITBT phin ri'ng v6'i NH3, sdn phAm amin t?o f_|3. __'_'' ,, g) t ii'yv * lt A. CH3NH2 . F^t(qH3)rNH t)ii: Ol trOn ho.p CHr{H2, (CH3)2NH, (CH3)3N. Ciu 19: Hg[ "Wit hfi'u co X cd c6ng thfrc C.HrOr, c6 kh5i lugng mol b[ng 1J6 gurn. Cft 2,72 gam ch6t X phin ring vila hei v6'i 40 ml dung dich NaOH iM t4o'ra mutii ve 0,36 gam nu6'c. Ch6t X ld A. hidroquinon. B. axit salixylio. CAu 20: Cho scv;eld chuy€n h6a sau: phAn i'ng v6i axit axetic lA I t : 'i,'ti A.4 chat. B.3 chAt. C. tli phenol. D. axetat phenyl. B. Cao su Buna. D. (-CHr{H=CH-CHz CH2{CI:CH-CH2-)". D. I chdt. ._rjrj:_- X3 __1 CHo r5oooc. X, cuzclr, X, -) !t x, ',, ',,. l+HcyHectt & __l Trong so'dd tr€n;Xs ld A. Cao su Cloropren. C. Cao su thi6n nhi€n. " Cffu 21: CAu hinh electron ndo sau dAy ld dring? l) Fe: 1s22s22p63s'3pu3du4s'. 2) Fe : ls22s22p63st3pu4st3du. 3i Fe'*: rs22s?p63s'3pu3du. 4) Fe3* : 1s22s22p63st3pu3d'. A.(2) . B. (2), (3), (4). C.(l), (3), (4). D, (l), (2), (3), (4). "Ciu22: Dung dich nu6'c v6i trong c6 c5c ddc tinh nAo sau dAy? l) C6 ndng dQ Cyo= 0,12%o; Crra: 0,02M. 2) PhAn ung duo. c v61 dung dich Xoda. 3) C6 ringtgng ld,Lrn trong nu6'c dr,rc. 4) Khdng c6 khi ning lim mAm nu6c c6 d0 cring tam thd'i. A. (l), (2). i B. (1), (2), (4). C. (l), (2), (3), (4). D.(2), (3), (4). ' '*/ .Fet*/ .Ag!/ CAu 23: Cho c6c cqp oxi h6a kltfi sau: ,u ,au /Fer* / Ag . _- / \v Nhan dinh ndo sau dAy ld'dring? ' A.'Fe2+ khri'duq; C,r?n tiihnh Cu. B. Ag* oxi h6a dugc Fe2* thdnh Fe3*. C.Ag* kht'duqc Fe3* thdLnh Fe2*. D. Fe2* oxi h6a duo. c Cu thinh Cu2*. CiluZ4zlida tan hoin iodLn IrSn ho.p gAm Kali vd Bari vdo nu'6c, thu duo. c 3,2lii dung dlch X vd 3,584 lft'khf H2 (dktc). Gi6 tri pH cria dung dich X ln A. 1. 8.2. c. 13. D.12. CAu 25: Trong st5 c6c lridrocacbon c6 ti kh6i so v6'i H2 bing 20, thi sti luo.'ng ch6t ldm mAt mdu dung dich thu6c tirn ld A. 1 chdt. , 8.2 chdt. C. 3 chAt. D.4 chat. '.{ 'Cau 26r DiQn ph6n 500m1 dung dfch NaCl iM c6 mdng ngdn, diQn cuc tro t6i khi 6 anot thoAt ra 17,92litl,hi (dktc) thi ngri'ng,diQn phAn. Kh6i iuo.ng dung dich bi giArn di do khi thodt ra ld A.56,8 gam. B.38,05 gam. C.35,35 gam. D. 18,25 gam. Ciu27: Choaxit axetic phAn irng v6'i mdi chAt: C2H2, CuO, C2H5OH, phenol (C6H5OH), Cu(OH)2. Sti chAt c6 C.2 ch?,t. Cdu 28: Trong sd c6c chat: CHTCOOH, HCOOH, C6H5OH, C3H5(OH)3 thi ch6t c6 luc axit (tinh axit) nranh nh6t la A. HCOOH B. CHJCOOH. c. c3H5(oH)3. D. C6H5OH. CAu 29: Trong dung dich CH3COOH 0,iM thi d0 diqn li cia axit bing lYo. Vay pH cia dung dich d6 ld A.3. B.Z. c. i,5. D, l Cf,u 30: Dun n6ng h5n ha'p g6m Glixin, Phenylalanin, Tyrosin, Valin vd Alanin tao ra pentapeptit c6 chri'a cic -A. .,-;,.^ "-;t L1.4. ,.1.o', qAl,r^'no nenf;rnentit c6 the rirlnc tan rc li www.VNMATH.com www.VNMATH.com CAu 31: O6t clay hodn toAn hdn.ho-p g6,n s6 grol bing nhau'cria FeS2 vA Ag2S, thir dr.ro.c ch6t rin X vd 3,36lii klri SOz (dktc). Kh6i luo-ng ch6t rin X thu dr,Loc ld ,t',:". 71- A. 13,6 gam. B. i4,8 garn. C. I5,6 gam. D. 15,2 garn. A. (2); (3). \ , B. (2), (3), (4). c.(l), (2),(3). D.(l), (2), (3), (4). Cfru 33: Hod tan hodn toAn 3,48 gam FeCO3 vdo luong du dung dich axit HNO3 lodng. thC tich khi kh6ng mau tho6t ra 6'dktc lA A. t,344lit. B. 0,g96 lir. c.0,6721it. H. a,224lit. Cflu 34: Cfuc-ghitAgCl, AgBr, AgI dAu khdng tan trong nu6'c, trong d6 chAt tan duo. c trong dung dich NH3 li A. AgCl. B. AgBr. C. AgI. D.tit cir 3 ch6t d6. p CAu 35: Hidrocacbon X c6 cdng thrllc ph6n tu' CrzHro kh6ng ldm m6t mdu dung dich KMnO4 6' nhiet d6 thu6ng ' vd cd.khi dun n6ng. Cho X phin ri'ng v6'i HNO:/HzSOa thu dugc sAn phAm C12HeNOz. 56 lugng chdt C12HeNO2 c6 thi5 t4o ra ld A. I ch[t: 8.2 chdt. C.3 ch6t. D-6 chdt. Ciu 36: DC trich ri6ng vd gifl' nguydn I6y lugng Ag ra ktr6i hdn hqp g6m Ag, Cu, Fe, AI, Zn, chicAn mgt h6a cnAt ta dung dich A. HCl. B. FeCl3. C. HNO.3. D. AgNO3. CAu 37: Cho phenol tdc dung v6'i luorrg du CH2O v6'i xirc t6c kiAm, thu duo-c sdn phArn'1u.uio.X A. ld polime rn4ch thing B. thuQc.lo4i poliancol. ' C. thuQc lo4i poliphenol. D. Id chAt cao phfur tft c6 cdu tao rnang khdng gian. CAu 38: Trong s6 cdc chAt: Anilin, p-Toluidin, amoniac, metylamin, ttimefylamin thi bazo mantr ntrdill A. amoniac. B. dimetylamin. C. mefylamin. D. p-toluidin. Y CAu 39: Hda tan 4,5 gam glucozo vho nudc, sau d{ thdm 3,2 gam Br2 vdo dung dich thu duo.c dung dich X. Thdm luqng du NaHCO3 vdo X thi th6 tich khi thoSt ra 6'di€u ki6n ti6u chuAn lA A. 1,3441it 8.,0,996 lit. C. 0,44g lit. D.0,224 lit. ',i C6.u 40: Hqp chdt X ld diaxit c6 khdi luong mol bing 116 garn. Khi bidun n6ng t6i D}ocrhi X biiSn rhdnh y c6 Hrt5i luo.ng mol bing 98 gam. Vay X In A. axit malie. B. axit maleic. C. axit fumaric. D. CHr C(COOH)2. t^" iid|iil *i:iH"J#llli']i-,"."co3.Mgco3 vii duo. c di'g trong luy€' ga'g, ruy€' th6p d6 rdrn ch6t chdy lo4i b6n qudng chri'a Silic. 2) Magie c6 trong thinh phAn cria c6c hop kirn nhu. Duyra. 3) Magie bich6y trong khi quytin CO2. 4) Magie oxit kh6ng duo-c dirng trong tli6n ph6n n6ng ch6y diAu chii Mg. PHAN RENG: ,Thisinh chi dwqc chon mQt trong hai phin dw6i d6y: Phin 1: Ddnh cho thf sinh han Ce bdn (Tw cdu 41 d6n cdu S0). Ciu 41: Cho th6 diQn cuc chuAn: Elr.ror:+0,80Vi Eln,.,rn: -0,14V. Sudt dien d6ng chuAn criapin di€n li6a Sn.Ag Id a. o,7gv, B. 0,66v. _ c.0,g4v D. l,0gv. Cdu 42: Nh6 gigt t[' tri 500 ml dung {fch hdn hgp gdin NanCAr 0,2I M vd KHCO, 0,i 8 M vdo c6c chila 100 ml dung dich HCI 1,5M, thu duoc V lit khi bay ra 6'dktc. Gi6 tri cria V IA A,2,1841it. B. 1,008 lit. C.l,l76lit. D. l,6g lit. lAu a3, H?.3r|ul !6n h-op X gdm NaCI vd Na2CO3 vdo lu6'c, sau d6 th6m axit HCI vria dri vdo dung dich thu duoc 4,48 tit-ktri ianc; vA dung dich Y. Th€rn luo-ng du dung dich AgNo3 vdo y, tao ra 100,45 gam fa i,i". sA mol NaCI c6 troirg h5n hop X ban dAu ld ) ir" A. 0,7 mol. B. 0,4 mol. C. 0,3 mol. D.0,2 mol. r Cdu 44: Dun n6rg Toluen v6'i dung dich KMnO4 t6i khi h6t rndu tirn. ThOm luo. ng du' axit HCI dac vAo h6n hop sau ph6n ring th6y tho6t ra 4,48 litkhf (dktc). Vfy s6 mol axit HCI de tham gia phAi ri'ng ld A. 1,0 Ift. B. 0,9 Hr. c.0,g lit. o.0,7 nt. i'Cffu 45: TIda tan a. gam h6n ho-p fiuctozo vi mantozo vdro nu6c, r6i chia dung dich thhh;phAn bilg nhau. - Cho phAn 1 phin ri'ng h6t v6'i luo. ng du dung dich AgNO3A{H3 ftu duqc 4}5.gam Ag. - Eu_n n6ng phArr 2 v6'i dung dich axit lodng, sau d6 cho phAn ring het v6'i aung aicnigNo3AtrH3 t6u duo-c 6,4g gam Ag.Vay s6 garn a cld durrg ld A. 10,44 gam. 8.5,22 gam. C. 6,48 gam. D. 3,6 gam. CAu 46: Trong sd cic amiu t'to, don chi'c, kh6i lugng mol bing 1),"o bao nhieu chdt kh6irg phin rl'ng v6i HN02? n. I ch6t. 8.2 clAt. c. I cnat. n. rnoni co "rra, iao. - Cdu 47: C6 circ dung dlch: nu6'c brom (l), KMnOa (2), I(2Cr2O, (3) vA nu'6'c v6i trong (4). Khf SOz c6 thi| ph6n rlrrrg duo-c voi c6c dung dich A. (1), (2), (3), (4) B. (1), (2), (4) c. (1), (2). D. (4). CAu 48: C6 c6c kim loai:'Al, Fe, Cr vd Cu. Kim loai khong tan trong axit HNO3 ddc ngu6i vd HzSOa dac neu6i ld www.VNMATH.com www.VNMATH.com 1 CAu 49: COng rhric cdu rgq thu gen crla axit salixyiic ldr COOH OH A. B. CAu 50: Cho so'd6 chuy6n h6a sau: CHo lSoooc- X cuzclz- Y Trong so d6 trdn M ld A. CrHro. ' ' B. Stiren. ' q.; qJ" q COOH CH: C. + HCI/HsCb Na ""'' b".t> Z _M D. Phin 2: Ditnh cho thi sinh ban N6ng cao (Ttr c6u 51 d6n c6u 60). Sr"" ll: Dun 11ng axit malic (*it uor-nooc-cn jH(oHrcOolD tt,, duo'c ch6t hr$co X c6 kh6i lucr.ng mol bang I 16 gam. 56 lugng ho. p ch6t c6 thd Ie X h A. I chft. ; . , B. Z chdt. C. 3 ch6t. D.4 ch6,t. CAu 52: Trong s5 c6c chAt: Cu, KI, H2S, KSCN. Chdt ndo khi tluoc cho vdo orng aj"t ruoi p.r. thi kh6ng c6 su klfi Fe3* thdnh Fe2*? A. HrS. : B. KSCN. C. KI, KSCN. D.K, H2S, KSCN, plu s1: cho.h-gn lqp.I Fg* crl, czFlr vd c}H2. Liy 8,6 gam X tdc d3rng trit .,oJ dung dlch brom (du) thi kh6i lI olre b19rn phan rlrng ld 48 gam. M[t kh6c, n6u cho 13,44 tit 1o'ancy h6nlep khf X rddd;;;^i;q"s j;il;; dich AgNO3 trong NHs , thu duo. c 36 gam t<6t ma. Phin trdm tt C ti"n .riu Cfl "O ttong X ld ),+olw y B.zTt% c.zs% n. iow lll lli.an:,911g,11t co,di quaiSng sri chira 6,4 gatiFe2o3 dtSt n6ng, dusc .rrdt ri,i i;" l4i trong 5ng. DIn khr :i96i.9le y1o binh dpg luo.'ng du nu'o-o v6i trong, thu dusc 3 gam ktit tua. Hda tan hiit X vdo r".o.,g'a*?"ng dich HNO3 lM' thAy bay ra l&f NO ld sin phAm th,i auy r*6t. fne tiih dung dich HNO3 dE phin ,i.ng u6.i i h ( 4.260 ml. B. 240 mt. C. 160mt. -n. [0,"f . c,eu 5r5: ry9ahn cr2(So+): vdo c6c nu6c, sau dg trr6m lugng du dung dich NaoH uao co",'roi Iai th€m ti6p brom vdo c6c t6i klri vi'a dri phAn ri'ng htit v6'i h-op ch6t cfia crori, thu du-n'c dung dfch X ,O ,nOii-Oog tid,,'"**rr. Mdu cria dung dich X ld A. rnau xanh. B. mdu vang. c. mdu da cam. D. kh6ng mdu. "a,11:fj.c,Pmdi kim loai Fe, Ag, Pb ua cu t6c dung v6-i dung dich HCl, a""g at.i'firio]'rounr. Kim to*i Klong tac dung la I Pl,.cu:eg. . " ".u, o*' c. cu. D.Ag. Cdu 57: Phin ri'ng nAo sau ddy c6 th6 x6y ra? C. Cao su cloropren. D. Cao su Buna. Z)ZnO + C -l* CO + Zn 4) Ni(OH), + 6NH: ^ + fNiffi)612* + 2OH- c. (2), (3). D.(2), (3), (4). CqHro 9!Jglq+ X (CeHeBr) B. 3 -brom-2-phenyipropen. D. o-bromisopropenylbenzen. 1) Ag2s + 4cN- -+ 2[Ag(cN)r] - + s2- 3) HgS + Oz ,$ Hg + SOz CAu 58: Cho so d6 chuy6n h6a sau: ' Cymen -a895 CeHllBr VAy ch6t X ld A. i -brom'2-phenylpropen. C. p-bromisopropenylbenzen. CAu 59: Cho so dd chuy6n h6a sau: KOlVmcol _ CH3OH + CO -jl+ X(duynhAt) LiAIH{ > y H,soo(d), lz00c , Z +oz,pdCtr,cucl, , M VAy ch6t M ld A.CzIIz' B. CH3-CH3. C. CH,CHO. D. CH3COOC2H'. Ciu 60: Chuy6n h6a hidrocacbon X iCrff,o) theo so aO ,uu,-^-'- X +orlvros > CsFIaOl +c6H5o,H > ClaHlsoa Vdy ch6t X lA A. Naphtalen. B. o-Xilen C. Dirnetylbenzen D. Etylbenzen. o0o www.VNMATH.com www.VNMATH.com www.VNMATH.com www.VNMATH.com . THPT ChuY6n KHTN BAt K|EM TRA KIEN THIIC UlOtq HOn HQC LCvP 12'- 1112 Thdi gian ldm bdi: 90 phitt A/gty thi: 27-11-2011 Me da thi: 193 C. D. Ho vi t6n hqc sinh: '. v6'i dung dich AgNOslNHr du thi tao r,a9,6-g"t ['ct*". Lfrat ruta" n6u cho V_lit k]ri X.nhu tr6llhdn frng hct v6i dung dich brom thi khoi f"n"g binh. HCOOH, C6H5OH, C3H5(OH)3 thi ch6t c6 luc axit (tinh axit) nranh nh6t la A. HCOOH B. CHJCOOH. c. c3H5(oH)3. D. C6H5OH. CAu 29: Trong dung dich CH3COOH 0,iM thi d0 diqn li cia axit