Nhin Bai Toan Hoa Bang Con Mat Kinh Dien

7/31/2019 Nhin Bai Toan Hoa Bang Con Mat Kinh Dien

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www.daykemquynhon.ucoz.com Trung tm bi dng kin thc vn ha cho hc sinh cp 2 + 3

PhmNgc Thch KHOA HA -HQG-HBK TP.HCM

KINH NGHIM V K NNG GII CC BI TON HA KINHIN MANG M BN CHT HA HC.

Cu 1: hn hp kh X gm 0,3 mol H2 v 0,1 mol vinylaxetilen. Nung X mt thi gian vi xc tc Ni thuc hh Y c t khi so vi kk l 1. nu cho ton b y sc t t vo dung dch Br2 d th c m gam brom thamgia phn ng. gi tri ca m l:

A. 8 B. 16 C.32 D. 3,2HD: tnh c mX suy ra s mol hh sau, gim th tch hay s mol chnh l s mol H2 tham gia phnng. nhn thy s mol H2 p =2 s mol vinylaxe, suy ra s mol buten to thnh =0,1=n.Br2. t cho tam=16.Cu 2: cho 3,36 gam Mg tc dng va vi 200ml dd HNO3 0,3M v H2SO4 bM thu c dd A(ch chacc mui) v 0,02 mol hh kh B gm 2 kh N2O v N2, t khi ca B so vi H2 bng 18. lm bay hi dd A thuc m gam mui khan. Gi tr ca m l:

A. 21,72 B. 17 C. 17,73 D. 17,08HD: s mol Mg=0,14 ; HNO3=0,06 ; Dung dch ch cha cc mui ngha l H

+ s dng va , bi ton stnh ton da trn nh lut bo ton in tch. V rng bi ton rt kh ch khng nh lng r rng vtng tc ca cc tc cht. V y l dng ton trc nghim, lc no cng th, bn c c gng nhy bn tm ra

phng php thch hp v nhanh chng.D dng tnh c N2O = N2=0,01. Bo ton electron: 0,28=0.01*10 + 0,01*8 + NH4+ ta c c s mol ca

NH4+= 0,0125. NO3

- =0,06-0,0125-0,04 ( bo ton nguyn t N ca N2O v N2) =0,0075. Trong dung dch lcby gigm NH4

+, Mg2+, NO3- v SO4

2-; suy ra s mol SO42- =0,1425. Vy m=0,0125*18 + 3,36 + 0,0075*62

+ 0,1425*96 = 17,73 gam.

Cu 3: kim loi M tc dng vi dd H2SO4 long thu c n cht kh X. B l mt oxit ca M, cho B tcdng vi dd HCl c cho n cht kh Y. D l mt mui ca M , nhit phn D thu c n cht kh XZ.Trn hh X, Y, Z vi t l s mol tng ng l 11:1:5 th thu c cht lng T. nng cht tan trong T l:

A. 27,58% B. 50,25% C. 44,78% D.28,85%HD: M l Mn, X l H2, Y l Cl2, Z l O2 . trn vi t l nh trn thu c 2HCl:10H2O

D suy ra nng HCl l 28,85%.Cu 4: nng ca H2 v I2 lc ban u u l 0,03 mol/l. khi t n trng thi cn bng , nng ca HI l0,04 mol/l. hng s cn bng ca phn ng tng hp HI l:

A. 16 B.32 C.10 D.8HD: D chn A. v hng s cn bng Kc bng tch nng cc cht sau p trn tch nng cc cht trcp.( c m h s p ln). Ch : hng s cn bng ch ph thuc vo nhit , khng ph thuc vo nng cc cht mu thun vi cng thc xc nh n.Cu 5:t chy hon ton 18 gam mt este X n chc thu c 20,16 lt CO2 (ktc) v 12,96 gam nc.mt khc nu cho 21 gam X tc dng vi 200 ml dd KOH 1,2M sau c cn dd thu c 34,44 gam cht rnkhan. Cng thc phn t ca axit to ra X l:

A.C5H6O3 B. C5H8O3 C. C5H10O3 D. C5H10O2

HD: d nhn ra y l este vng. Phn ng nh sau: este + NaOH = HO-R-COONa. Phn sau bn c tgii. d nhn ra nu cc bn c phn xa vi bi ton, khng th bn c gng bin lun cc case este c niiCu 6:hn hp X gm mt ankan v mt anken. Cho X tc dng vi 4,704 lt H2(ktc) cho n p hon tonthu c hh Y gm 2 kh trong c H2 d v 1 hidrocacbon. t chy hon ton Y ri cho ton b sn phmvo nc vi trong d thy khi lng bnh ng nc vi trong tng 16,2 gam v c 18 gam kt ta tothnh. Cng thc ca 2 hidrocacbon l:

A. C2H6 v C2H4 B. C2H8 v C3H6 C. C4H10 v C4H8 D. C5H10 v C5H12HD:t Y cng nht X. s mol nc to t ankan v anken trong X l: 0,46-0,21=0,25.


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D nhn thy 2 hidrocb ny c cng s cacbon vi n.nc=0,25, n.CO2= 0,18, chnh lch x\v s mol doankan gy ra, suy ra s mol ankan= 0,25-0,18=0,07. Gi cng thc ankan: CnH2n+2 cho ra nCO2, v c 2 hidrcbu to kh nn: n*0,07


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HD: nY/nX=X/Y=0,6, suy ra s mol hh u =1, hh sau = 0,6. ng thi d kin t khi hh sau bng 8(tc lMsau=16


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hon ton hh trong bnh kn. Sau khi ngng t ht hi nc cn li 15,009 lit( o 270C v 1,6974 atm,bit trong kk oxi chim 20% th tch cn li l N2). CTPT ca mi loi ancol l:

A.C3H7OH v C2H5OH B. CH3OH v C3H7OHC. C3H7OH v C4H9OH D. C2H5OH v C3H7OH

HD: n.kh =1,1, suy ra O2=0,22; N2=0,88(kh tr, khng p). sau khi ngng t nc c 1,036 mol kh, suy ras mol hh sau( k tnh N2)= 1,036-0,88=0,156. vit pt pt anken, v gi s mol anken chung l x. khi

O2 d=0,22-1,5nx ( oxi phi d trong trng hp ny v nu ht gii ra n=5,2); v CO2=nx mol. Suy ra 0,22-1,5nx+nx=0,156, nn x=0,128/nTa c: 2,72n/0,128=14n+18 ( y l M ca anken), gii ra c n=2,5. l cng thc chung ca C2 v C3.

Cu 19: mt hh A gm 2 kh N2 v H2 vi t l th tch l 1:3. to phn ng gia N2 v H2 sau p thu c hhkh B . t khi hi ca A so vi B l 0,875. Tnh hiu sut ca p tng hp NH3:

A. 25% B. 30% C.20% D. 15%HD: nB/nA=MA/MB=0,875, suy ra nB=0,875*nA=0,875*4=3,5. bi ton ny gim 2x mol.Do : 4-2x=3,5, suy ra x=0,25, suy ra H=0,25/1=25% ( pp t chn lng cht)

Cu 20: hh X gm A l mt axit hu cno, 2 chc, mch hv B l axit khng no( c 1 ni i C=C trong

phn t), n chc mch h. S Cacbon trong A bng 2 ln s C trong B. t chy 5,08 gam hh X thu c4,704 lt CO2. Nu trung ha ht 5,08 gam hh X cn 0,07 mol NaOH. Cng thc phn t ca A, B ln lt l:A.(COOH)2 , C3H5COOH B. C4H8(COOH)2; C2H3COOHC. C2H4(COOH)2, C2H3COOH D. CH2(COOH)2; C5H9COOH

HD: D chn c B; c 3 p n cn li u khng tha mn s C nh bi nu.Nu gii ta s gii nh sau: gi A: C2n: y mol; B: Cn: x mol. Th th n(x+2y)=0,21, mt khc A, B u tcdng vi NaOH vi s mol NaOH p l x+2y=0,07, suy ra n=3. T cho ta A lC4H8(COOH)2; B lC2H3COOH.

Cu 21: Xt phn ng thun nghch sau: SO2(k) + NO2(k) SO3(k) + NO(k). cho 0,11 mol SO2, 0,1 mol NO2,0,07 mol SO3 vo bnh kn dung tch 2 lt; gi nhit n nh l t

0C. khi phn ng t n trng thi cn

bng thy cn li 0,02 mol NO2. Hng s cn bng ca phn ng ti nhit l:A. 20 B. 18 C. 10 D. 0,05.HD: ch hng s cn bng; hng s axit tnh ton da trn nng ht. ta a s mol v nng sau dtnh c Kc=20.

Cu 22: thc hin phn ng este ha gia butan-1,2,4-triol v hn hp 2 axit CH3COOH v HCOOH th thuc ti a s dn xut ch cha chc este l:

A. 7 B. 8 C. 5 D. 6HD: ti a l: 2 este thun + chnh hp chp 2 ca 3 phn t =8.

Cu 23: Dung dch axit fomic HCOOH 0,092% (D=1g/ml) c in li l 5%. pH ca dung dch l:

A. 2,3 B. 4,3 C. 3 D. 4HD: chn 1 lt dd. Tng ng vi 1000g HCOOH, cho ta s mol ca axit fomic l 0,02. suy ra s mol H+phn li ra= 0,02*0,05=10-3 cng l nng H+ phn li ra( v chn 1 lt). Suy ra pH= -lg[H+]=3.

Cu 24: khi iu ch axetilen bng phng php nhit phn nhanh metan thu c hh A gm axetilen, hidrov mt phn metan cha phn ng. t khi ca A so vi hidro bng 5. hiu sut qu trnh chuyn ha metanthnh axetilen l:

A. 30% B. 70% C. 60% D. 40%HD: T chn lng cht: chon 1 mol hh sau phn ng. bo ton khi lng suy ra s mol metan=0,625. yl bi ton nhit phn( c th l cracking) tng th tch. Th th:


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s mol hh sau s mol ankan ban u= s mol ankan tham gia phn ng.suy ra s mol metan p=1-0,625=0,375. t, ta c c H=0,375/0,625=60%.

Cu 25:A l mt cht hu cm khi t chy 0,1 mol A cn 0,9 mol O2. Sn phm chy ch gm CO2 vH2O. Hp th sn phm chy vo bnh nc vi trong d, thy khi lng bnh tng 37,2 gam, trong bnh tora 60 gam kt ta. Sng phn cis, trans mch hc th c ca A l:

A. 4 B. 6 C. 8 D. 10

HD: d kin ta bit c A l C6H12. c tt c 8 ng phn cis- trans.

Cu 26: gi s gang cng nh thp ch l hp kim ca st vi cacbon v st ph liu ch gm st, cacbon vFe2O3. coi phn ng xy ra trong l luyn thp Martanh l: Fe2O3 + 3C 2Fe + 3CO. Khi lng st ph liu(cha 40% Fe2O3, 1%C) cn dng khi luyn vi 4 tn gang 5%C trong l luyn thp Martanh, nhm thuc loi thp 1%C l:

A. 1,5 tn B. 2,93 tn C. 2,15 tn D.1,82 tn

HD: gi m tn l khi lng st ph liu cn em luyn. V sau phn ng l thp nn Fe2O3 ht, C d. Nnd kin s tnh theo Fe2O3 : 0,4m; mC= (0,2 +0,01m) tn. v khi lng cht rn sau phn ng l ( 4+ m

0,4m*3*28/160) = ( 4+ 0,79m) tn. mC phn ng= 0,43*3*12/160= 0,09 tn. Suy ra C d = ( 0,2 0,08m)tn. Theo yu cu bi ton ta thit lp c phng trnh: 0,01(4 +0,79m)= (0,2 0,08m). Vy gii ra cm=1,82 tn.

Cu 27: cho tdung dch HCl 35% vo 56,76 ml dung dch NH3 16%( c D=0,936 g/ml) 200C, cho n

khi trung ha va , thu c dd A. lm lnh dd A v 00C th thu c dd B c nng 22,9% v cm gam mui kt ta(kt tinh). Tr s ca m l:

A. 2,515 B. 2,927 C. 3,014 D.3,428HD:S mol ca NH3=0,5 ; tnh c m dung dch =105,27. m mui A=0,5*NH4Cl=26,75

m mui B=0,229*105,27=24,1. ; suy ra mui NH4Cl(tham gia kt tinh)=26,75-24,1=2,65 tng ng s moll 0,05=s mol nc kt tinh, tng ng vi 0,9 gam. Vy mNH4Cl.H2O=0,9+2,65=3,55 gn bng p n.

Cu 27: t 3 nguyn liu u l eten v benzen( xc tc v iu kin p c ), iu chc 3 polimegm polistiren, polibutaien v poli(butaien-stiren), cn thc hin s lng phn ng ha hc t nht l:

A. 5 B. 6 C. 7 D. 8HD:i vi PS cn thc hin: th Br2 vo benzen(xt bt st) ; tip tc th bezyl vo eten; ri trng hp.i vi polibutaien: hp nc eten to etanol; vi xc tc Al2O3, 450

0C thu c ivinyl; ri trng hp.ng trng hp 2 cht trn ta thu c poli(butaien-stiren). Ht 7 phn ng.

Cu 28: hn hp kh A gm 0,2 mol axetilen; 0,3 mol etilen; 0,3 mol metan v 0,7 mol hidro. Nung nng hhA, c Ni lm xc tc, thu c 28 lt hh kh B(ktc). Hiu sut H2 cng vo cc hidrocacbon khng no l:A. 35,71% B. 40,25% C. 80,56% D. 100%

HD: tnh c s mol A=1,5 mol; s mol B=1,25 mol. gim s mol chnh l lng H2 tham gia phnng. =1,5-1,25=0,25 mol. Th th H=0,25/0,7=35,71%

Cu 29:t chy hon ton hh A gm 1 anken v 1 ankan thu c a mol CO2 v b mol H2O. Gi k l t sca b/a. Gi tri ca k chy trong khong:A. 1


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HD: s chnh lch v s mol sn phm khi t hh A l do ankan to ra. Ta c th xem hh A ch c ankan, khit chy t s k=b/a=n.H2O/n.CO2= (n+1)/n. Xt hm s k(n)= (n+1)/n trn min I= [1;+v cng].Do k(n)


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Cu 35: khi cracking V lit butan thu c hh A ch gm cc ankan v anken.t khi hi ca hh A so vikhng kh bng 1,5. hiu sut ca phn ng cracking butan l bao nhiu?

A. 33,33% B. 50,33% C.46,67% D. 66,67%HD: chn 1 mol hh sau p. bo ton khi lng cho ta mbutan=43,5. tm c s mol butan =0,75.S mol hh sau- s mol butan ban u=s mol butan tham gia p=1-0,75=0,25.Suy ra H=0,25/0,75=33,33%.

Cu 36: hh X c 2 hidrocacbon ng ng lin tip, c t khi hi so vi H2=15,8. ly 6,32 gam X li vo 200gam dd cha xc tc thch hp th thu c dd Z v thy thot ra 2,688 lt kh kh Y ktc c t khi hi sovi H2=16,5. bit rng dung dch Z cha anehit vi nng C%. gi tr ca C% l:A. 1,305% B. 1,407% C. 1,043% D. 1,208%

HD: d thy dd Z gm C2H2 v C3H4. c 2 u hp nc vi xc tc HgSO4, 800C. tuy nhin ch c axetilen

cho anehit, cn propin cng nh cc ankin khc cho ra xeton. Ta s tnh c phn 2 cht ny li trongdung dch l: m=6,32 0,12*33= 2,36 gam ; n= 6,32/31,6 0,12= 0,08 mol.Gi s mol ca C2H2 v C3H4 ln lt l x v y. gii h pt trn nhn c x=0,06; y=0,02. t cho ta khilng ca CH3CHO l 0,06*44=2,64 gam ; mdd=200+2,36. Suy ra C=2,64/(200+2,36)=0,01305.

Cu 37: X l mt hexapeptit cu to t mt amino axit thun ty Y ( ch c 1 nhm amin v mt nhmcacboxyl). Y c tng % khi lng ca oxi v nito l 61,33%. Thy phn ht m gam X trong mi trng axitthu c 30,3 gam pentapeptit, 19,8 gam ipeptit, v 37,5 gam Y cn d. Gi tr ca m l?HD: CnH2n+1O2N. suy ra 46/(47+14n)=0,6133 => n=2. Vy Y l glycocol( glyxin).Thit lp cng thc peptit ta c hexepeptit C12H20N6O7 ; pentapeptit C10H17N5O6 =0,1 mol; ipeptitC4H8N2O3 = 0,15 mol; v Y= 0,5 mol. Bo ton nguyn t Nito => s molX= (0,5+0,15*2+0,5)/6. Vy m=ci * hexepeptit C12H20N6O7 = 78 gam.

Mt sbi tp tluyn:

Cu 38: cho x mol st tan ht trong dd cha y mol HNO3 ( t l x:y=16:61), ta thu c mt sn phm kh Yduy nht v dung dch Z ch cha mui st. S mol mol electron ma x mol st nhng ra khi tham gia phnng l:

A. 1,75x mol B. y mol C. 2x mol D. 3x molCu 39: hh kh A gm 3 kh: NO; H2 v mt kh X c khi lng 0,772 gam v th tch 0,9632 lt (ktc).Trn 0,4816 lt A vi 1 lt O2 thy th tch kh cn li l 1,3696 lt. Tm kh X, bit trong A c 2 kh m % thtch bng nhau:

A. N2 B. N2O C. SO2 D. NO2Cu 40: ha tan hon ton mt lng hh X gm Fe3O4 v FeS2 trong 63 gam HNO3, thu c 0,07 mol NO2.Dd thu c cho tc dng va vi 200ml dd NaOH 2M, lc kt ta v nung n khi lng khng i thuc 9,76 gam cht rn. nng % ca dung dch HNO3 l:

A. 47,2% B. 46,2% C. 46,6% D. 44,2%Cu 41: cho m gam st vo dung dch cha ng thi dd H2SO4 v HNO3 thu c dung dch X v 0,2 molNO( duy nht);. Thm tip H2SO4 vo X th li thu c 0,08 mol NO na v dung dch Y.. Dung dch Y hatan va ht 8,32 gam Cu v khng c kh bay ra. Khi lng ca st cho vo l: S: 16,24 gam

TNG HP CU HI L THUYT HAY V KH. (By 20/09/2012)

Cu 1. Cho cc phn ng sau:(a) CuO + HCl (c)


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(b) K2Cr2O7 + HCl (c) (c) Cu + NaNO3 + HCl (d) Zn + H2SO4 (long) (e) Mg + HNO3(long) (g) CaCO3 + HNO3 (c) (h) FeCO3 + H2SO4 (long) (i) FeSO4 + KMnO4 + H2SO4 (long)

S phn ng m ion H+ ca axit ng vai tr cht oxi ha lA. 1. B. 3. C. 2. D. 4.

Cu 2. Cho cc pht biu sau:(a) Dung dch natri isopropylat trong nc c th lm qu tm ha xanh.(b) Dung dch axit axetic c th ha tan c CuO to thnh dung dch c mu xanh.(c) Oxi ha ancol bc mt bng CuO (to) thu c xeton.(d) Naphtalen tham gia phn ng th brom kh hn so vi benzen.(e) Phn ng tch H2O t ancol etylic dng iu ch etilen trong cng nghip.(g) Benzen c th tham gia phn ng th v phn ng cng clo.S pht biu ng l

A. 3. B. 4. C. 2. D. 5.

Lin kt cng ho tr l lin kt c to nn gia hai nguyn tbng mt hay nhiu cp electron dngchung

Cu 3:Thc hin cc th nghim sau:(a) Cho dung dch FeCl2 tc dng vi dung dch AgNO3 d.(b) Cho Cl2 tc dng vi toluen trong iu kin chiu sng (khng c xc tc).(c) Sc kh HI vo dung dch FeCl3.(d) Cho Fe3O4 tc dng vi dung dch HCl.(e) Sc kh axetilen vo dung dch brom trong dung mi CCl4.S th nghim xy ra phn ng oxi ha - kh lA. 3. B. 4. C. 2. D .5.

Cu 4:Hp cht T c to bi 4 nguyn t ca 2 nguyn t phi kim R v X (s hiu nguyn t ca R nhhn s hiu nguyn t ca X). Tng s ht mang in trong mt phn t T l 20. Pht biu sai l: Gii: T l

NH3(Ni N c ha tr V thc ra khng ng, v N c cu hnh e l 1s2 2s2 2p3, c 3e c thn nn ch c ha trIII thi. Nu tnh thm LK cho nhn nh N2O5 th l IV.Cn P th khc. P cng c ha tr III nh N (VD PH3) nhng do P c phn lp 3d trng nn khi b kch thch,electron 3s ca P s "nhy" sang to thnh 5e c thn, nn P c ha tr V (VD PCl5))A. Hp cht T c th to c lin kt hiro vi nc.B. Trong cc hp cht vi cc nguyn t khc, R c th c s oxi ha bng -1.C. trng thi kch thch, nguyn tnguyn t X c 5 electron c thn.D. Trong phn t T, nguyn t X trng thi lai ha sp3.(3 ni n)


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Cu 5:. Cho dy cc cht: benzyl axetat, vinyl axetat,metyl fomat, anlyl clorua, phenyl fomat, isopropylclorua, triolein. S cht trong dy khi thy phn trong dung dch NaOH (d), un nng sinh ra ancol lA. 4. B.6. C. 5. D. 3.

Cu 6:. Cho cc pht biu sau:(a) C th dng nc brom phn bit saccarozv mantoz.(b) C th phn bit saccarozv mantozbng phn ng vi dung dch AgNO3 trong NH3.

(c) Trong dung dch, saccarozv mantozu ha tan Cu(OH)2 nhit thng cho dung dch muxanh lam.(d) Trong dung dch, saccaroztn ti ch yu dng mch h.(e) Trong mi trng baz, saccarozv mantozc th chuyn ha ln nhau.(g) Trong phn t saccarozc nhm -OH hemiaxetal.S pht biu ng lA. 5. B. 4. C. 3. D. 2.

Cu 7. Tin hnh cc th nghim sau:(a) Cho dung dch Ba(OH)2 vo dung dch NaHCO3.(b) Cho dung dch Al2(SO4)3 ti dvo dung dch NaAlO2 (hoc dung dch Na[Al(OH)4].

(c) Sc kh CH3NH2 ti dvo dung dch FeCl3.(d) Sc kh propilen vo dung dch KMnO4.(e) Sc kh CO2 vo dung dch Na2SiO3.(g) Sc kh H2S vo dung dch SO2.(h) Sc kh NH3 ti d vo dung dch AgNO3.Sau khi cc phn ng kt thc, c bao nhiu th nghim thu c kt ta?A. 6 B. 3 C. 5 D. 4

Cu 8 Cho dy cc cht: Cr(OH)3, CrO3, ZnO, Ca(HCO3)2, Al(OH)3, CrO, CO2, NO2, P2O5, N2O5, PCl5,Al4C3. S cht tc dng c vi dung dch NaOH long, ngui lA. 10. B. 11. C. 9. D. 12.

Cu 9. Trong cc th nghim sau:(a) Cho kh O3 tc dng vi dung dch KI.(b) Nhit phn amoni nitrit.(c) Cho NaClO tc dng vi dung dch HCl c.(d) Cho kh H2S tc dng vi dung dch FeCl3.(e) Cho kh NH3 tc dng vi kh Cl2.(g) Cho dung dch H2O2 tc dng vi dung dch cha KMnO4 v H2SO4 (long).(h) Sc kh O2 vo dung dch HBr.(axit HI, HBr c tnh kh lu ngy trong kk b ha nu do b O2oxi ha, to n cht Br2)(i) Cho NaI tc dng vi dung dch axit H2SO4 c, nng.

(k) Cho SiO2 tc dng vi Na2CO3 nng chy.S th nghim to ra n cht lA. 5 B. 8 C. 7 D. 6Cu 10:Pht biu khng ng l:A. Vt liu compozit, vt liu nano, vt liu quang in t l nhng vt liu mi c nhiu tnh nng c bit.B. Cc kh SO2, NO2 gy ma axit, kh CO2 gy hiu ng nh knh cn hp cht CFC gy thng tng ozon.C. Cc cht: Penixilin, amphetamin, erythromixin thuc loi thuc khng sinh, cn: Seduxen, moocphin,ampixilin thuc loi cht gy nghin.D. Vic s dng cc cht: Fomon, ure, hn the, phn m trong bo qun v ch bin thc phm l vi phm vsinh an ton thc phm.


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Cu 11: . Pht biu no sau y l sai?A. Tnh axit ca HF yu hn tnh axit ca HI.B. Nhit si ca hiro florua cao hn nhit si ca hiro clorua.C. Tnh khca HCl mnh hn tnh khca HBr.D. Bn knh ca ion F- nh hn bn knh ca ion Cl-

Cu 12:t chy hon ton 18 gam mt este X n chc thu c 20,16 lt CO2 (ktc) v 12,96 gam nc.mt khc nu cho 21 gam X tc dng vi 200 ml dd KOH 1,2M sau c cn dd thu c 34,44 gam cht rnkhan. Cng thc phn t ca axit to ra X l:

A.C5H6O3 B. C5H8O3 C. C5H10O3 D. C5H10O2y l este vng

Cu 13: Cho cc cht: isobutan, isobutilen, isopren, vinyl axetilen, ivinyl, metylxiclopropan, toluen,naphtalen, xiclohexan, xiclohexen. Trong s cc cht trn, s cht phn ng c vi nc brom lA. 7. B. 6. C. 4. D. 5.

Cu 14: Cho cc cht sau: C2H2; PROPIN; CH2=CHCH3; C2H3CH2CH2CH3; C2H4Cl2; C4H10;CH3CHO; C2H5OH; CH3COONa; C6H5CH2CH3. C bao nhieu cht trong s cc cht trn bng 1 phnng duy nht iu chc axit axetic:

A. 6 B. 7 C. 8 D. 9

Cu 15:Nu in phn cc dung dch mui Na ca cc ion Cl- ,Br- ,I- cng nng mol th hi cng mtthi gian no dd no c pH cao nht?

A. Cl- B. Br- C. Br- v I- D. I-

Cu 16: C cc pht biu sau:1. CO km bn v nhit, rt c.2. Trong cng nghip sn xut Iot trong bin.3. iu ch Flo trong cng nghip bng cch in phn hn hp gm KF v NaF iu kin thch hp4. than xng dng lm cht n cao su, sn xut mc in giy v xi nh giy.5. C c 2 dng th hnh l kim cng v than ch.6. Si c 2 th hnh l tinh th v v nh hnh7. SiO2 c phn ng vi MgCO3nhit cao.8. iu ch than g bng cch t chy g trong oxi d.9. thnh phn chnh ca t st l bng thch(criolit)-Na3AlF610.iu ch than than ch t than m, iu ch than mui bng cch nhit phn metan c xc tc

S cc pht biu khngng l:A. 5 B. 6 C. 8 D.7Cu 17: C cc pht biu sau:

11.glucozo c 2 loi tinh th kt tinh c nhit nng chy khc nhau. Nhm OH hemiaxetal vtr C1 khi chuyn thnh nhm OCH3 th dng vng khng chuyn sang dng mch hc na.

12.trong mu ngi c nng n nh ca glucozo l 0,1%, nc dch glucozo dng cho bnhnhn c nng 5%. Trong y hc glucozo dng lm cht chuyn ha.

13.trong y hc ZnO dng lm thuc gim au dy thn kinh cha bnh nga, chm, eczema


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14.trong y hc trn cc kh N2O vi O2 t l th tch 1:4 dng lm thuc gy m cho cc ca m nh15.photgen c dng lm thuc gim au.16.hidroquinon v catechol l hai ng phn c cng cng thc phN tC6H4(OH)217.Trong dung dch glucozo tn ti ch yu dng mch vng 6 cnh(anpha hoc beta)18.Trong dung dch fructozo tn ti ch yu dng vng 5, 6 cnh(beta)19.hn hp tecmit bao gm Al v oxit st, dng lm phng tin hn ni trong ckh.20.t chy du iezen s c khc bay ra nhSO2, H2S, CO2

S pht biu ng l:A. 7 B. 4 C. 5 D.8

Cu 11: c cc pht biu sau:1. phng php iu ch Oxi trong phng th nghim l in phn nc v chng ct phn on khng

kh lng.2. amophot l phn bn hn hp, nitrophotka l phn bn phc hp.3. anilin iu kin thng l cht lng mu trng, khi b oxi ha ha en.4. cacbon chy c trong oxi v ozon, PbS mu en chuyn mu trng khi tc dng vi ozon iu kin

thng.5. ozon l cht ty trng trong cng nghip, oxi l nguyn t ph bin nht trong v tri t.6. Flo d dng thay th oxi trong nc ngay iu kin thng.7. iu kin thng, fomandehit l cht kh, tan trong nc to dung dch km bn.8. trng thi kch thch cc phn t ozon c th va chm mnh v gy n ln.9. Flo c m in ln nht trong tt c cc nguyn t nn flo d dng phn ng vi Si, Cr nhit

thng.10.trong mui n lun c mt hm lng nh KIO311.axeton phn ng vi axit HCN to sn phm khng bn l xianohrin

S pht biu khng ng l:A. 4 B. 5 C. 6 D. 7Cu 12: c cc pht biu sau:

1. photpho trng, tinh th iot, nc c cu trc mng tinh th nguyn t.2. photgen c cng thc l POCl3, photphoryl clorua c cng thc COCl23. phn bn m amoni nn bn vo t t chua, hoc c kh trc bng CaO.4. phn m nitrat Ca(NO3)2 c tc dng kch thch cy trng ra nhiu l, nhiu hoa, thch hp vi t

chua.5. phn ln cn thit cho cy trng thi k sinh trng do thc y qu trnh sinh ha, trao i cht v

nng lng thc vt.6. dinh dng ca phn Kali c nh gi bng hm lng K2O, phn kali gip cy hp thm tt

hn cn thit cho vic to cht ng, cht bt, cht x, cht du, tng cng sc chng bnh, chngrt, chu hn ca cy.

7. Trong cng ngh m phm, hidroquinon c dng 1 lng nh lm kem dng da.8. phenol l axit yu nht, HClO4 l mt trong nhng axit mnh nht trong tt c cc axit.9. trong cng nghip, anken c iu ch bng phn ng ehiro ha ankan10.trong cng nghip CO2 c diu ch t vic t chy than.

S pht biu ng l:A. 7 B. 8 C. 9 D.10Cu 13: c cc pht biu sau:

1. phenol iu kin thng l cht rn khng tan, cn gi l axit phenic.2. tetralin v ecalin, clorofom, axeton dng lm dung mi. Naphtalen sn xut dc phm trong cng

nghip, iu ch naphtol, anhidrit naphtalic, naphtylamin.3. axeton dng sn xut bisphenol, clorofom v ioofom.4. nhit thp, but-2-in tc dng vi brom dto sn phm tetrabrom.


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5. nhit cao, ankadien u tin to sn phm cng 1,4; c mt cht xc tc Cl2,Br2 th c th cngvo 2 lin kt C=C.

6. anken, ankadien, benzen, trong phn t ca chng cc nguyn t C v H u cng nm trn cng 1mt phng.

7. trong phn t ankin, cc nguyn t C nm trn cng mt ng thng. Trong phn t xicloankan trxiclo propan th cc xicloankan khc u c C khng cng nm trn mt mt phng.

8. anilin phn ng vi dung dch hn hp NaNO2 v KHSO4 to n cht kh tr.9. benzen, stiren, naphtalen l cc cht lng khng mu, nh hn nc v khng tan trong nc.10.SiO2 l oxit axit, d tan trong kim nng chy v khng tan trong axit.

S pht biu ng l:A. 9 B. 6 C.10 D.8Cu 14: c cc pht biu sau:

1. Qung malachit c cng thc Cu(OH)2.Cu(CO)3. qung hematit nu c cng thc Fe2O3.nH2O,thnh phn chnh ca t st l cao lanh: Al2O3.2SiO2.2H2O.

2. c 4 cht hu cmch hc cng thc C2H2On tc dng vi AgNO3/NH3 to kt ta.3. trong mng tinh th kim loi ch c cc nguyn t kim loi cc nt mng tinh th.4. Cr khng tc dng vi dung dch kim v HNO3 long, Cr2O3 d tan trong dung dch kim long5. c 3 cng thc cu to ca hp cht l ng phn ca Toluen tham gia phn ng vi AgNO3/NH3 to

kt ta vng nht.6. iu ch butan tetannol cn ti thiu 2 phn ng.7. clorua vi c dng ph bin hn nc Javen, HNO3c dng ph bin hn H2SO4 trong lnh vc

sn xut v i sng.8. trong tnhin khng tn ti Si trng thi tdo, tn ti dng hp cht: SiO2,cc khong vt

silicat, aluminosilicat nhcao lanh, mica fenspat, x vn v thch anh.9. dung dch ha tan kh hidro sunfua va c tnh kh, va c tnh oxi ha. HNO3 l cht oxi ha

kh.10.thuc u que dim c cha KClO3ng vai tr cht oxi ha.11.cc ankan tC2-C4 l cht kh khng mi, tC5-C8 l cht lng c mi xng, C10-C14 c mi du

ha.

S pht biu ng l:A. 7 B. 8 C. 9 D. 11Cu 15: Cho hp cht c cng thc phn t C2H2On, s cht khi phn ng vi AgNO3/NH3 to kt ta l:gm 4 cht l C2H2; (CHO)2,; (HCO)2O; HOOC-CHOCu 16: Cho 4 hp cht hu cc cng thc phn t ln lt l CH2O, CH2O2, C2H2O3, C2H4O2,C3H6O3. S cht mach ho va tc dng vi dung dch NaOH, va c phn ng trng gng lA 6 B 4 C 5 D 3Li gii: HCOOH, HOOC-CHO, HCOOCH3, HCOOCH2CH2OH(c 2), HCOOCH2OCH3.vy l 6

NI DUNG BM ST THI I HC-TRNG TM

Cu 17: Tng h s nguyn ti gin sau khi cn bng hai phng trnh ha hc sau ln lt l:(a): FeSO4 + KMnO4 + KHSO4 - Fe2(SO4)3 + K2SO4 + MnSO4 + H2O(b): K2SO3 + KMnO4 + KHSO4 K2SO4 + MnSO4 + H2OA. 52-27 B. 56-28 C. 52-28 D. 56-26Cu 18: Cho cc cht: bc axetilua, metan; 1,2-icloetan; canxi cacbua; propan; etyl clorua; metanol;etanol; nhm cacbua. S cht iu ch etanal bng hai phn ng ha hc l:A-5 B-6 C-7 D-8


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Cu 19: s cng thc cu to ca hp cht l ng phn ca Toluen m tham gia phn ng vi AgNO3/NH3l: A. 1 B. 5 C. 4 D. 2Cu 19: Cho cc phn ng:

Na2O2 + H2O

Cl2 + KOH

Fe3O4 + H2SO4 (loang)

toc

CH3 -CH=CH2 + Br2(dd)

CH2=CH2 + H2O

C2H5OH + HBr (bk)

CH3 -CHO + H2

tocH

Mg(NO3)2

Trong cc phn ng trn c bao nhiu phn ng l oxh-kh, bao nhiu phn ng oxi ha kh ni phn t:A. 7 4 B. 6 4 C. 5 4 D. 6 2

Cu 20: cho cc dung dch sau: (1): K2Cr2O7 + H2SO4; (2): H2SO4c; (3): Na2S; (4): HCl; (5): KBr; (6):Fe(NO3)2. Trn ln lt cc dung dch vi nhau tng cp mt th c bao nhiu cp c phn ng xy ra, trong bao nhiu cp xy ra phn ng oxi ha kh:A. 11-8 B. 10-8 C. 11-7 D. 8-7Cu 21: tin hnh phn ng nhit phn hn hp X gm butan v heptan( t l mol 1:2) th thu c hn hp Yc t khi so vi H2 l a ( gi s ch xy ra phn ng cracking to thnh anken v ankan vi hiu sut 100%).

Kt ;un ng l:A. 12,9=


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VN LN: P SUT - CN BNG HA HC - TC PHN NG

Lin quan n bi ton vcht kh, thtch :

Cu 1: Cho cn bng ha hc: aA + bB pC + qD , 150 oC , smol cht D l x mol, 180 oC , smol chl y mol. Bit x > y v (a+b) > (p+q) ; cc cht trong cn bng trn u thkh. Kt lun no sau y l

?A. Phn ng thun ta nhit v tng p sut B. Phn ng thun thu nhit v gim p sutC. Phn ng thun thu nhit v tng p sut D. Phn ng thun ta nhit v gim p sut

Cu 2: Cho phn ng CO + Cl2 COCl2 thc hin trong bnh kn dung tch 1 lt nhit khng i. Kcn bng [CO] =0,02 ,[Cl2] = 0,01 , [COCl2] = 0,02 .Bm thm vo bnh 0,02 mol Cl2 . nng mol/l ca COCl2 v COCl2trng thi cn bng mi l?A.0.016, 0.026, 0.024 B.0.014, 0.024, 0.026 C.0.012, 0.022, 0.028 D.0.015, 0.025, 0.025

Cu 3: Khi cracking butan thu c hh Agm 6 hidrocacbon v H2 c thtch l 300 lt. Dn hh A vo dd nBr2 dthy c 200 lt kh thot ra, cc thtch o c cng iu kin Hiu sut crackingl ?A. 50 % B. 60 % C. 65 % D.66,67 %

Cu 4: Khi cracking butan thu c hh kh X c thtch 40,32 lt(ktc), dn X qua bnh ng nc Br2 dthy c 128 g Br2 phn ng. Bit X chcha anken, ankan, H2 d. Hiu sut cracking butan l ?A 80 % B. 75 % C. 33,33 % D. 66,67 %

Cu 5: Cho V lt hh kh X gm H2 ,C2H2 ,C2H4 (trong smol C2H2 =smol C2H4) , i qua Ni nungnng(100%) thu c hh kh Y (ktc), bit dY/H2 =6,6. Nu cho hh X qua bnh ng Br2 th khi lng btng n l ?A.5,4 g B. 2.7 g C. 6.6 g D. 4.4 g

Cu 6: cho 1 thanh Al vo dd cha 0,03 mol HCl v 0,03 mol RCl2 .Sau phn ng hon ton thy khi lthanh Al tng ln 0,96 g. Kim loi R l? S:Ni

Cu 7:in phn 200 ml dd R(NO3)2 (R l kim loi ha tr2,3, khng tc dng vi H2O ), vi dng in mchiu I=2A trong 32 pht 10 giy th va in phn ht R2+, ngng in phn v yn dd 1 thi gian th tc 0,28 g kim loi. Khi lng dd gim l?A. 0,16 g B. 0,72 g C. 0,59 g D. 1,44

Cu 8: hh gm FeS2, FeCO3 vi smol bng nhau vo bnh kn cha O2 d, p sut trong bnh l p1 atm.nng bnh phn ng xy ra hon ton ri a bnh v nhit ban u, p sut trong bnh l p2 atm. t/p2 bng:A. 1 B. 1/2 C. 2 D. 4

Cu 9: Cn bao nhiu gam oleum A c CT: H2SO4.3SO3 pha vo 100 ml dd H2SO4 40 % (d=1,31 g/cm3)

to ra oleum c hm lmg SO3 l 10 %:A.467,2 B.594,3 C.416,8 D.576,6

Cu 10: Hh X gm mt anehit v mt ankin c cng snguyn tcacbon.t chy a mol hh X thu c mol CO2 v 1,8a mol H2O. Hh X c smol 0,1 tc dng c vi ti a 0,14 mol AgNO3 trong NH3. Smolanehit trong 0,1 mol hh X l ?A.0,03 B.0,04 C.0,01 D.0,02


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Cu 11: Khi cracking V lt butan thu c hh A chgm ankan v anken. d A/kk =1,5. Hiu sut phn ngcracking butan l bao nhiu :A.33,33 % B.50,33% C.46,67% D.66,67%

Cu 12: Cho x mol Fe tan ht trong dd cha y mol HNO3 (x:y =16:61) ta thu c mt sn phm khduy nv dd Z chcha mui st. Smol electro m st nhng khi tham gia phn ng l :

A,1,75 mol B.y mol C.2x mol D.3x mol

Cu 13:in phn 200 ml dd AgNO3 0,1M v Cu(NO3)2 0,2M vi in cc tr, I=5A trong thi gian 9 phgiy. Khi lng dd sau in phn gim m g. Tnh m, bit hiu sut l 80%, b qua sbc hica nc:A.3,92 B.3,056 C.6,76 D.3,44

Cu 14in phn dd Fe2(SO4)3 1M (in phn cc tr) vi I=2,68A trong thi gian t gith c kh thot raanot(hiu sut 100%) Gi trca t l :A.1 B.6 C.4 D.2

Cu 15: Cho dung dch X cha hn hp gm CH3COOH 0,1M v CH3COONa 0,1M. bit 250C Ka ca

CH3COOH l 1,75.10-5

v b qua sphn li ca nc. gi trpH ca dung dch X250

C lA. 1,00 B. 4,24 C. 2,88 D. 4,76

Cu 16:t a mol X l trieste ca glixerol v axit n chc, mch hthu c b mol CO2 v c mol H2O, bc =5a. Hiro ha m g X cn 6,72 lt H2 (ktc) v 39 g X'. Nu un m g X vi dd cha 0,7 mol NaOHn phng, sau c cn dd sau phn ng th thu c bao nhiu g cht rn >A.57,2 g B.52,6 g C.53,2 g D.61,48 g

Cu 17: Ch cc nguyn tsau 6C; 14Si; 16S; 15P. Dy cc nguyn tc sp xp theo chiu tng dn bknh nguyn tttri sang phi l:A.C,S,P,Si B.S,P,Si,C C.Si,P,S,C D.C,Si,P,S

Cu 18: Hn hp X gm H2, propen, propanal, ancol alylic (CH2 = CH- CH2OH).t 1 mol hh X thu c40,32 lt CO2(ktc).un X vi bt Ni sau mt thi gian thu c hh Y c dY/X=1,25. Nu ly 0,1 mol hh Y thdng vi V lt Br2 0,2M. Gi trca V l:A.0,1 lt B.0,25 lt C.0,3 lt D.0,2 lt

Cu 19: Cho cc cht sau: imetylete, vinyl axetat, saccaroz, tinh bt, vinyl clorua, nilon-6,6scht bthy phn trong mi trng kim long:A.2 B.5 C.3 D.4

Cu 20: Hn hp X c 2 hirocacbon n ng lin tip, c tkhi so vi hiro l 15,8. Ly 6,32 g X li vo

dd cha xc tc thch hp th thu c dd Z v thy thot ra 2,688 lt kh kh Yktc c tkhi so vi H2 lBit dd Z cha anehit vi nng C%. gi trC% l:A.1,305% B.1,407% C.1,403% D.1,208%

Cu 21: Ha tan hon ton 1 lng hh X gm Fe3O4 v FeS2 trong 63 g HNO3, thu c 0,07 mol NO2. Ddc cho tc dng va vi 200 ml dd NaOH 2M, lc kt ta em nung n khi lng khng i thu 9,76 g cht rn. C% HNO3 l:A.47,2% B.46,2% C.46,6% D.44,2%


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Cu 22: Cho cc cht butylclorua, anlylclorua, phenylclorua, vinylclorua. un si cc cht vi dd NaOHtrunh ha NaOH dbng HNO3, ri nh vo d vi git dd AgNO3. Dd khng to thnh kt ta l :A.phenylclorua B.butylclorua C.anlylclorua D.vinylclorua

Cu 23: Hn hp kh A gm 3 kh: NO, H2, v 1 kh X, c khi lng 0,772g v c thtch 0,9632 lt(ktc).0,486 lt kh A vi 1 lt O2 thy thtch kh cn li l 1,3696 lt. Tm X, bit trong A c 2 kh % thtch bng

?A.N2 B.N2O C.SO2 D.NO2Cu 24: Mt cht hu cX c CTG l C4H4O tc dng va vi dd KOH 11,666%. Sau phn ng thu dd Y. C cn dd Y th phn hi chc H2O vi khi lng 86,6 g, cn li cht rn Z c khi lng 32 g. CTthu gn ca X c thl ?A.HCOOC6H4C2H5 B.HCOOC6H4CH3C.CH3COOC6H5 D.CH3COOC6H5 hoc HCOOC6H4CH3

Cu 25: Cho m g Fe vo ddng thi cha H2SO4 v HNO3thu c dd X v 0,2 mol NO (duy nht). ThmH2SO4 vo dd X th li thu c 0,08 mol NO v dd Y. Dd Y ha tan va ht 8,32g Cu khng c kh bay ra.lng ca Fe cho vo l ?

s: 16,24 gam

Cu 26: Oxi ha m g hh X gm HCHO, CH3CHO bng O2iu kin thch hpthu c hh Y dgm cchu c. Tkhi ca Y so vi X bng x. Khong bin thin ca x l ?s: 1,36 < x


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Cu 33:mt hn hp kh X gm N2 v H2 c tkhi so vi H2 l 4,25. nung nng X vi bt st 1 thi gian hp ra NH3, sau phn ng thu c hh kh Y c tkhi dX/Y=0,8. tnh hiu sut phn ng:A. 25% B.80% C. 33,33% D. 40%Cu 34: bit rng khi nhit tng ln 100C th tc phn ng ca mt phn ng tng ln 2 ln. vy tcphn ng tng ln bao nhiu ln khi tng nhit t20 ln 1000C.A. 16 B. 14 B. 64 D. 256Cu 35: nguyn tX c tng selectron cc phn lp s l 6 v selectron lp ngoi cng cng l 6. Cho

l nguyn tha hc no sau y:A. Cl B. F C. O D. SCu 36: hn hp X gm O2 v O3 c tkhi so vi H2 bng 20.t chy hon ton 1 mol CH4 cn smoA. 1,2 B. 1,5 C. 1,6 D. 1,75

Cu 37: cho cc cht sau: KHCO3, (NH4)2CO3, Al, AlCl3, Zn(OH)2, CrO3, Cr2O3. scht c tnh lng tnhA. 6 B. 5 C. 3 D. 4

Cu 38: cht no sau y c phn ng a hp v gii trng hp:A. axetilen v benzen B. axetilen v vinyl axetilen C. etilen v stiren D. axetilen v stiren

Cu 39: cho cc cht: X1-canxiaxetat; X2: vinyl axetat; X3: ancol n-propylic; X4: ancol iso-propylic; X5: aniso-butylic; X6: iso-propylaxetat. Tcc cht no c thiu chaxeton bng mt phn ng trc tip:A. X2, X3 B. X2, X5, X3 C. X1, X4 D. X1, X4, X6

Cu 40: cho cc tn gi sau: tecpen, tecmit, iezen. l tn gi theo thtc cng thc, thnh phn chnph gia l g:A. (C4H8)n, Fe v Mg, S(lu hunh) B. (C4H8)n, Al v CuO, P(photpho)C. (C5H8)n, Mg v Fe2O3, C(cacbon) D. (C5H8)n, Fe2O3 v Al, S(lu hunh)

Cu 41: Cr v Al2O3 khng tc dng vi cht hoc dung dch no sau y:A. NaOH long, ngui B. HNO3, nng C. NaOH. nng D. HNO3 long

Cu 42: nicotin mt cht c thgy nghin, c nhiu trong thuc l, c nhiu nh hng n x hi, tuy nu iu lc khi cho vo dung dch vi tl thch hp li rt c li. V la ca v cc loi trng cng c tcdng. hai mt c li trn l:A. chng st g, ci thin khng kh B. chng st g, ci thin t trngC. chng n mn ha hc, ci thin khng kh D. chng n mn ha hc, ci thin ngun n

Cu 43: ma axit v hiu ng nh knh do nhng nguyn nhn( yu t) no gy ra:A. SOx, NxOy v CH4, CO2 B. SOx, NxOy v H2S, O3C. NH3, Cl2 v CH4, H2S D. NH3, Cl2 v CO2, H2S

Cu 44: ha tan 3,76 gam hn hp bt gm Fe v Cu vo 150 ml dung dch AgNO3 1M. khi kt thc phnc dung dch X v cht rn Y. Trong Y c:A. Ag, Fe, Cu B. Ag C. Ag, Fe D. Ag, Cu

Cu 45: C 3 dung dch NH4HCO3 , NaAlO2 , C6H5ONa v 3 cht lng C2H5OH, C6H6, C6H5NH2. Nuchdng thuc thduy nht l dung dch HCl th chnhn bit c cht no:

A. Nhn bit c c 3 dung dch v C6H6B. NH4HCO3, NaAlO2, C6H6, C6H5NH2C. Nhn bit c c 3 dung dch v C6H6D. Nhn bit c c 6 cht.


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Cu 46: M tng dng ca no nhm di y l cha chnh xc?

A. Lm vt liu chto t, my bay, tn la, tu v tr

B. Lm khung ca, trang tr ni tht v m trang sc.

C. Lm dy dn in, thit btrao i nhit, cng cun nu trong gia nhD. Chto hn hp tecmit, c dng hn gn ng ray.Cu 47: Glicogen hay cn gi l

A. glixin B. tinh bt ng vt C. glixerin D. tinh bt thc vtCu 48: Cho x(g) hn hp hi metanol v etanoli qua ng cha CuO nung nng, khng c khng khCc sn phm kh v hi sinh ra c dn i qua nhng bnh cha ring rH2SO4v KOH. Sau thnghim thy bnh H2SO4 () tng z gam, bnh KOH () tng t gam. Biu thc no sau y ng:

A. z > t B. z < t C. x + y = z + t D. B v CngCu 49 : Phn tmantozc cu to bi

A. 1 gc glucozv 1 gc fructoz B. 2 gc fructozdng mch vngC. nhiu gc glucoz D. 2 gc glucozdng mch vng

Cu 50: cc cht no sau y c thha tan c vng :A. NaCN, thy ngn lng, nc cng toan, clo trong HCl cB. HClO4, POCl, NaCN, ancol isoamylic

C. Thy ngn lng, nc JaVen, nc cng toan, anilinD. HClO4, thy ngn lng, nc cng toan, clo trong HCl c

Thch chc bn c sc khe, thnh cng trong cng vic Nim tin c sc mnh xua tan bt cshoinghi no ca ngi khc. Ti scgng vit v cp nht nhng kinh ngim mi hay v b ch hn, cbit l ton kim loi v in phn( dng kh ca thi i hc). Thi gian sp ti, ti sgii chi tit li thi H 2012 nhm gip cc bn c ci nhn mt mv khong t hn trong cch tduy v c ci nhntng quan v xu hng ra thi i hc 2013.

Mi chi tit, thc mc xin lin h 0989769577. Tn trng ssng to v cng sc ca ngi khc l xemtrng chnh mnh! Xin cm n.


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