Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 HC MI LN Kè THI TRUNG HC PH THễNG QUC GIA NM 2017 Mụn: KHOA HC T NHIấN HểA HC ễN TP S Thi gian lm bi: 50 phỳt, khụng k thi gian phỏt ( thi cú 40 cõu / trang) Cho bit nguyờn t ca cỏc nguyờn 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; Fe = 56; Cu = 64; Zn = 65; Ag = 108; Ba=137 Thi th theo chuyờn + thi th mi nht ti: https://www.facebook.com/groups/123701861435410/ - Tng hp cỏc thi th hay mi nht - Tng hp cỏc chuyờn trng tõm phc v cho kỡ thi ỏnh giỏ nng lc - Tng hp cỏc chuyờn hay l khú chinh phc im 8, 9, 10 Cõu 1: Kim loi no di õy cú th iu ch bng phng phỏp nhit luyn? A Mg B Na C Fe D Al Cõu 2: Thớ nghim no di õy khụng xy phn ng? A Cho kim loi Fe vo dung dch HCl loóng B Cho kim loi Fe vo dung dch HNO loóng, ngui C Cho kim loi Cu vo dung dch FeSO D Cho kim loi Cu vo dung dch Fe 2(SO4)3 Cõu 3: Trng hp no di õy khụng xy n mũn in húa? A Vt lm bng gang thộp khụng khớ m B ng x ca ng c t C Phn v tu bin chỡm nc bin D Nhỳng Fe vo dung dch CuSO Cõu 4: Bin phỏp no di õy cú th lm mm c nc cng tm thi v nc cng vnh cu? A dung dch NaOH B un núng dung dch C dung dch Ca(OH)2 D dung dch Na2CO3 Cõu 5: Phn ng no di õy khụng to Ag kim loi? A t chỏy qung Ag2S B Cho NaF vo dung dch AgNO C Nhit phõn mui AgNO3 D Cho Cu vo dung dch AgNO Cõu 6: Hũa tan hon ton 11,9 gam hn hp Al v Zn bng dung dch HCl thu c dung dch X v mt lng H2 va kh 32 gam CuO Tng lng mui X l A 12,7 gam B 40,3 gam C 43,9 gam D 28 ,4 gam Cõu 7: Phỏt biu no sau õy khụng ỳng? A Crom(VI) oxit l oxit baz B Ancol etylic bc chỏy tip xỳc vi CrO C Khi phn ng vi dung dch HCl, kim loi Cr b oxi hoỏ thnh ion Cr 2+ D Crom(III) oxit v crom(III) hiroxit u l cht cú tớnh lng tớnh Cõu 8: Trong cỏc loi qung st, qung cú hm lng st cao nht l: A hematit B xierit C hematit nõu D manhetit Cõu 9: Khi nung hn hp cỏc cht Fe(NO 3)2, Fe(OH)3 v FeCO3 khụng khớ n lng khụng i, thu c mt cht rn l A Fe3O4 B FeO C Fe D Fe2O3 Cõu 10: Cho dóy cỏc kim loi: Na, Cu, Fe, Ag, Zn S kim loi dóy phn ng c vi dung dch HCl l Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 A B C D Cõu 11: Cho cỏc cht sau: Na, Al, Fe v Al2O3 Cú th nhn cỏc cht trờn ch bng hoỏ cht l A Dung dch HCl B Dung dch CuSO4 C H2O D Dung dch NaOH Cõu 12: t núng mt hn hp gm Al v 16 gam Fe 2O3 (trong iu kin khụng cú khụng khớ) n phn ng xy hon ton, thu c hn hp rn X Cho X tỏc dng va vi V ml dung dch NaOH 1M sinh 3,36 lớt H2 ( ktc) Giỏ tr ca V l : A 150 B 100 C 200 D 300 Cõu 13: Cho hn hp X gm Fe2O3, ZnO v Cu tỏc dng vi dung dch HCl (d) thu c dung dch Y v phn khụng tan Z Cho Y tỏc dng vi dung dch NaOH (loóng, d) thu c kt ta A Fe(OH)2 v Cu(OH)2 B Fe(OH)2,Cu(OH)2 v Zn(OH)2 C Fe(OH)3 D Fe(OH)3v Zn(OH)2 Cõu 14: loi b cỏc cht SO 2, NO2, HF khớ thi cụng nghip v cỏc caiton Pb 2+, Cu2+ nc thi nh mỏy ngi ta thng dựng loi húa cht (r tin) no di õy? A Ca(OH)2 B NaOH C NH3 D HCl Cõu 15: Cht no di õy cũn gi l ng mớa? A Glucoz B Fructoz C Mantoz D saccaroz Cõu 16: un núng 37,5 gam dung dch glucoz vi lng AgNO 3/dung dch NH3 d, thu c 6,48 gam bc Nng % ca dung dch glucoz l A 11,4% B 14,4% C 13,4% D 12 ,4% Cõu 17: S hp cht l ng phõn cu to, cú cựng cụng thc phõn t C 4H8O2, tỏc dng c vi dung dch NaOH nhng khụng tỏc dng c vi Na l A B C D Cõu 18: Cht X cú cỏc c im sau: phõn t cú nhiu nhúm OH, cú v ngt, hũa tan Cu(OH)2 nhit thng, phõn t cú liờn kt glicozit, khụng tham gia phn ng gng Cht X l : A xenluloz B fructoz C glucoz D saccaroz Cõu 19: Cht no di õy c to thnh t loi nguyờn t húa hc? A axit cloaxetic B polistiren C metylamoni nitrat D xenluloz triaxetat Cõu 20: Phỏt biu no di õy khụng ỳng? A Propan-2-amin (isopropyl amin) l mt amin bc hai B Tờn gi thụng dng ca benzen amin (phenyl amin) l anilin C Cú bn ng phõn cu to amin cú cựng cụng thc phõn t C 3H9N D Dóy ng ng amin no, n chc, mch h cú cụng thc C nH2n+3N Cõu 21: Cho m gam axit aminoaxetic tỏc dng va vi 200 ml dung dch HCl 1M thu c dung dch X phn ng hon ton vi cỏc cht tan X cn 160 gam dung dch NaOH 10% Cụ cn dung dch thu c cht rn khan cú lng l A 31,1 gam B 19,4 gam C 26,7 gam D 11 ,7 gam Cõu 22: Cht no di õy khụng b thy phõn? A polietilen B tristearin C protein D tinh bt Cõu 23: Cho 20 gam hn hp amin: metyl amin, etyl amin, anlyl amin tỏc dng va vi V ml dung dch HCl 1M Sau phn ng cụ cn dung dch thu c 31,68 gam mui khan Giỏ tr ca V l A 120 ml B 160 ml C 240 ml D 320 ml Cõu 24: X phũng húa 8,8 gam etyl axetat bng 100 ml dung dch NaOH 2M Sau phn ng xy hon ton, cụ cn dung dch thu c cht rn khan cú lng l A 3,28 gam B 8,56 gam C 8,2 gam D 12 ,2 gam Cõu 25: Hũa tan hon ton m gam Cu vo 400 gam dung dch Fe(NO 3)3 12,1% thu c dung dch A cú nng Cu(NO3)2 l 3,71% Nng % Fe(NO 3)3 dung dch A l A 2,39% B 3,12% C 4,20% D ,64% Cõu 26: Nh rt t t dung dch cha HCl vo 100 ml dung dch A cha hn hp cỏc cht tan l NaOH 0,8M v K2CO3 0,6M Lng khớ CO2 thoỏt c biu din trờn th sau: Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 Giỏ tr ca y trờn th l A 0,028 B 0,014 C 0,016 D 0,024 Cõu 27: Cho dung dch Ba(HCO3)2 ln lt vo cỏc dung dch: CaCl 2, Ca(NO3)2, NaOH, Na2CO3, KHSO4, Na2SO4, Ca(OH)2, H2SO4 v HCl S trng hp cú to kt ta l A B C D Cõu 28: Cho 5,6 gam Fe vo 200 ml dung dch Cu(NO 3)2 0,5M v HCl 1M thu c khớ NO v m gam kt ta Bit rng NO l sn phm kh nht ca NO 3- v khụng cú khớ H2 bay Giỏ tr ca m l A 1,6 gam B 3,2 gam C 6,4 gam D 12 ,8 gam Cõu 29: Hn hp X gm kim loi: Fe, Ag, Cu Cho X vo dung dch Y ch cha cht tan, khuy k cho n phn ng kt thỳc thy Fe v Cu tan ht v cũn li Ag khụng tan ỳng bng lng Ag cú hn hp X Cht tan dung dch Y l A AgNO3 B Cu(NO3)2 C Fe2(SO4)3 D FeSO4 Cõu 30: Trong cỏc phỏt biu sau : (1) Theo chiu tng dn in tớch ht nhõn, cỏc kim loi nhúm IIA cú nhit núng chy gim dn (2) Kim loi Cs c dựng ch to t bo quang in (3) Cỏc kim loi Na, Ba, Cr u tỏc dng vi nc nhit thng (4) Kim loi Mg khụng tỏc dng vi hi nc nhit cao (5) Cs l kim loi d núng chy nht (6) Thờm HCl d vo dung dch Na 2CrO4 thỡ dung dch chuyn sang mu da cam S phỏt biu ỳng l A B C D Cõu 31: Hũa tan ht 33,2 gam hn hp X gm FeO v Fe3O4 1,2 lớt dung dch cha KHSO M v HNO3 0,5M thu c dung dch Y v hn hp khớ Z gn NO v NO2 cú t hi so vi H2 bng 17,67(ngoi khụng cũn sn phm kh no khỏc) Chia dung dch Y thnh phn bng nhau: - Phn I cho tỏc dng ht vi 900 ml dung dch NaOH 0,5M Sau phn ng thu c 10,7 gam mt kt ta nht - Phn II cho tỏc dng vi dung dch Ba(OH)2 d thỡ thu c m gam kt ta Bit cỏc phn ng xy hon ton Giỏ tr ca m l A 150,5 B 128,9 C 163,875 D 142,275 Cõu 32: Hn hp X gm CaO, Mg, Ca, MgO Hũa tan 5,36 gam hn hp X bng dung dch HCl va thu c 1,624 lớt H2 (ktc) v dung dch Y ú cú 6,175 gam MgCl v m gam CaCl2 Giỏ tr ca m l A 7,4925 gam B 7,770 gam C 8,0475 gam D ,6025 gam Cõu 33: t chỏy hon ton m gam mt cht bộo (triglixerit) cn 1,61 mol O 2, sinh 1,14 mol CO2 v 1,06 mol H2O Cng m gam cht bộo ny tỏc dng va vi dung dch NaOH thỡ lng mui to thnh l A 23,00 gam B 20,28 gam C 18,28 gam D 16 ,68 gam Cõu 34: Cho cỏc loi hp cht: aminoaxit (X), mui amoni ca axit cacboxylic (Y), amin (Z), este ca aminoaxit (T) Dóy gm cỏc loi hp cht u tỏc dng c vi dung dch NaOH v u tỏc dng c vi dung dch HCl l A X, Y, Z, T B X, Y, T C X, Y, Z D Y, Z, T Cõu 35: Hp cht X cú cụng thc C8H14O4 T X thc hin cỏc phn ng (theo ỳng t l mol): Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 (a) X + 2NaOH X1 mui + X2 ancol n + H2O (b) X1 + H2SO4 X3 + Na2SO4 (c) nX3 + nX4 nilon-6,6 + 2nH2O (d) 2X2 + X3 X5 + 2H2O Phõn t ca X5 l A 198 B 202 C 216 D 174 Cõu 36: Cho X, Y, Z, T l mt cỏc cht sau: glucoz, anilin (C6H5NH2), fructoz v phenol (C6H5OH) Tin hnh cỏc thớ nghim chỳng v ghi nhn li kt qu, ngi ta cú bng tng kt sau: Nc Br2 Dd AgNO3/NH3, t X Y Z T Chỳ thớch nht mu (-) (-) (-) : kt ta (+): cú phn ng (-): khụng phn ng o dd NaOH (-) (-) (+) (-) Cỏc cht X, Y, Z, T theo th t ln lt l A phenol, glucoz, anilin, fructoz B anilin, fructoz, phenol, glucoz C phenol, fructoz, anilin, glucoz D anilin, glucoz, phenol, fructoz Cõu 37: Hn hp E gm este n chc X v hai este no, hai chc, mch h Y v Z (MY < MZ) t chỏy hon ton 8,85 gam E cn va 0,4075 mol O2, thu c 4,95 gam H2O Mt khỏc 8,85 gam E tỏc dng va vi 0,13 mol NaOH thu c 4,04 gam hai ancol (no, n chc, ng ng k tip), cụ cn dung dch sau phn ng c m gam hn hp mui T Phn trm lng ca mui cacboxylat cú lng phõn t ln nht T cú giỏ tr gn nht vi A 30,2% B 30,3% C 30,4% D 30 ,5% Cõu 38: Hp cht hu c X (mch h) cha C, H, O Ly 0,1 mol X cho tỏc dng va vi 200 ml dung dch NaOH 1M ch thu c 19,6 gam cht hu c Y v 6,2 gam ancol Z Cho Y tỏc dng vi dung dch HCl loóng, d thu c hp cht hu c T Bit T tỏc dng vi Na thu c s mol H thoỏt bng s mol T tham gia phn ng Trong s cỏc kt lun sau v X: (1) cú nhúm chc este (2) cú nhúm hiroxyl (3) cú cụng thc phõn t la C6H10O6 (4) cú kh nng tham gia phn ng gng S nhn nh ỳng l A B C D Cõu 39: Cho hn hp E gm este n chc, l ng phõn cu to ca v u cha vũng benzen t chỏy hon ton m gam E cn va 8,064 lớt khớ O (ktc) thu c 14,08 gam CO v 2,88 gam H2O Mt khỏc, un núng 34 gam hn hp E vi 175 ml dung dch NaOH 2M (va ) ri cụ cn dung dch sau phn ng thỡ thu c hn hp Y gm mui khan Thnh phn phn trm v lng ca mui Y l A 55,43% v 44,57% B 56 ,67% v 43,33% C 46,58% v 53,42% D 35 ,6% v 64,4% Cõu 40: Cho m gam hn hp X gm mt peptit A v mt amino axit B (MA > 4MB) cú s mol bng tỏc dng vi dung dch NaOH va thỡ thu c dung dch Y cha (m + 12,24) gam hn hp mui natri ca glyxin v alanin Bit dung dch Y phn ng c vi ti a l 360 ml dung dch HCl 2M to thnh dung dch Z cha 63,72 gam hn hp mui Cỏc phn ng xy hon ton Kt lun no di õy l ỳng? A A cú liờn kt peptit phõn t B A cú cha 20,29% Nit v lng C A cú gc amino axit phõn t D B cú cha 15,73% Nit v lng HT -Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 PHN TCH HNG DN GII CHI TIT THI TH HC MI LN Cõu 1: Chn C - Phng phỏp nhit luyn c ng dng rng rói cụng nghip iu ch nhng kim loi cú hot ng húa hc trung bỡnh nh Zn, Cr, Fe, Sn, PbC s ca phng phỏp ny l kh nhng ion kim loi cỏc hp cht nhit cao bng cỏc kim loi mnh nh C, CO, H2 hoc Al, kim loi kim, p t t kim th Vớ d : Fe2O3 + CO Fe + CO2 hay nhit nhụm: Cr2O3 + 2Al Al2O3 + 2Cr Cõu 2: Chn C A Fe + HCl FeCl2 + H2 B Fe + HNO3(loóng, ngui) Fe(NO3)3 + NO + H2O C Cu + FeSO4 khụng phn ng D Cu + Fe2(SO4)3 CuSO4 + 2FeSO4 Cõu 3: Chn B Cõu 4: Chn D Na2CO3 loi b Mg2+ v Ca2+ nc cng tm thi v nc cng vnh cu Mg2+ + CO32- MgCO3 Ca2+ + CO32- CaCO3 Cõu 5: Chn B t Ag + SO2 A Ag2S t0 C AgNO3 Ag + NO2 + O2 Cõu 6: Chn B - Khi dn H2 qua CuO thỡ n H2 n CuO 0, mol B NaF + AgNO3 khụng phn ng D Cu + AgNO3 Cu(NO3)2 + Ag 27n Al 65n Zn 11,9 n Al 0,2 mol - Theo bi ta cú h sau : BT:e 3n Al 2n Zn 2n H 0,8 n Zn 0,1mol Vy m muối 133,5n AlCl3 136n ZnCl 40,3(g) Cõu 7: Chn A Crom (VI) oxit l oxit axit, Crom (III) oxit l oxit lng tớnh v Crom (II) oxit l oxit baz Cõu 8: Chn D Cỏc qung thng gp ca Fe l xiderit: FeCO 3, hematit nõu: Fe2O3.nH2O, hematit : Fe2O3, pirit: FeS2, manhetit: Fe3O4 Cõu 9: Chn D t Fe2O3 + 2NO2 + O2 Fe(NO3)2 t Fe2O3 + H2O Fe(OH)2 + O2 t Fe2O3 + CO2 FeCO3 + O2 Cõu 10: Chn C S kim loi tỏc dng c vi dung dch HCl l Na, Fe v Zn Cõu 11: Chn C Na Al Fe H2 O Cú khớ thoỏt ra(*) Khụng hin tng Khụng hin tng NaOH (sp ca *) Cú khớ thoỏt Khụng hin tng Cõu 12: Chn D Al2O3 Khụng hin tng Tan NaOH t 2Al Fe O 2Fe Al O 0,1mol 0,1mol Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 2n H2 0,1mol 0,3mol VNaOH 0,3(l) - Khi cho X tỏc dng vi NaOH thỡ n Al(dư) - Khi ú n NaOH 2n Al 2O3 n Al(dư) Cõu 13: Chn A HCl NaOH(dư) Fe O , ZnO,Cu FeCl ,CuCl , ZnCl Fe(OH) ,Cu(OH) Na ZnO hỗn hợp X dung dịch Y hỗn hợp kết tủa Cõu 14: Chn A Cõu 15: Chn D Glucoz gi l ng nho, fructoz gi l ng mt ong, mantoz gi l ng mch nha, saccaroz gi l ng mớa Cõu 16: Chn B n Ag - Khi cho dung dch glucụz tỏc dng vi AgNO 3/NH3 thỡ n Glucozơ 0,03mol 0,03.180 100 14, - Vy C%Glucozơ 37,5 Cõu 17: Chn C HCOO-nC3H7, HCOO-isoC3H7, CH3COOC2H5 v C2H5COOCH3 Cõu 18: Chn D Cõu 19: Chn D A Cl-CH2COOH B (C6H5C2H3)n C CH3NH3NO3 D C6H7O2(OOCCH3)2 Cõu 20: Chn A A Sai, CH3CH(NH2)CH3 (isopropyl amin) l mt amin bc mt B ỳng, tờn gi thụng dng ca C 6H5NH2 (phenyl amin) l anilin C ỳng, C3H7NH2, CH3CH(NH2)CH3, C2H5NH-CH3 v (CH3)3N D ỳng, dóy ng ng amin no, n chc, mch h cú cụng thc C nH2n+3N (n 1) Cõu 21: Chn A Dung dch mui sau cựng cha NaCl (0,2 mol) v NH 2CH2COONa (0,2 mol) Vy m muối 58,5n NaCl 97n NH 2CH 2COONa 31,1(g) Cõu 22: Chn A Cõu 23: Chn D m m amin n BTKL n HCl muối khan 0,32 mol VHCl HCl 0,32 (l) 36,5 Cõu 24: Chn D t CH 3COOC H NaOH CH 3COONa C H 5OH 0,1mol 0,2 mol 0,1mol Vy m rắn khan 82n CH3COONa 40n NaOH(dư) 12,2 (g) Cõu 25: Chn A - Gi x l s mol ca Cu ú ta cú n Cu n Cu(NO3 )2 x mol - Theo thỡ C%Cu(NO3 )2 188n Cu(NO3 )2 188x 100 100 0,0371 x 0,08 mol m dung dịch A 64x 400 - M n Fe(NO3 )3 (dư) n Fe(NO3 )3 (ban đầu) 2n Cu 0,04 mol C%Fe(NO )3 0,04.242 100 2,39 0,08.64 400 Cõu 26: Chn A - Ti v trớ nHCl = x mol thỡ x n HCl n NaOH n CO32 0,14 mol Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 - Ti v trớ nHCl = 1,2x mol y n CO2 n HCl n NaOH n CO32 1,2x x 0,2x 0,028 mol Cõu 27: Chn D Cú trng hp to kt ta l NaOH, Na 2CO3,KHSO4, Na2SO4, Ca(OH)2 v H2SO4 Ba(HCO3)2 + NaOH Na2CO3 + BaCO3 + H2O Ba(HCO3)2 + Na2CO3 BaCO3 + NaHCO3 Ba(HCO3)2 + KHSO4 BaSO4 + K2SO4 + CO2 + H2O Ba(HCO3)2 + Na2SO4 BaSO4 + NaHCO3 Ba(HCO3)2 + H2SO4 BaSO4 + CO2 + H2O Ba(HCO3)2 + Ca(OH)2 BaCO3 + CaCO3 + H2O Ba(HCO3)2 + 2HCl BaCl2 + CO2 + H2O Cõu 28: Chn A - Dung dch sau phn ng gm Fe 2+, Cu2+, NO3- v Cl- Kt ta ch cha Cu n n - Nhn thy rng 2n Fe H nờn n NO H 0,05mol 4 2n 3n NO 0,025mol m Cu 1,6 (g) - Bo ton e cho ton quỏ trỡnh ta cú : n Cu Fe Cõu 29: Chn C Fe + Fe2(SO4)3 3FeSO4 Cu + Fe2(SO4)3 CuSO4 + 2FeSO4 Cõu 30: Chn C Ch cú phỏt biu (1) ỳng (1) Sai, Theo chiu tng dn in tớch ht nhõn, cỏc kim loi nhúm IIA cú nhit núng chy khụng bin thiờn tun hon (2) ỳng, Kim loi Cs c dựng ch to t bo quang in (3) Sai, Cr khụng tỏc dng vi nc nhit thng (4) Sai, Mg khụng tỏc dng vi nc nhit thng nhng tỏc dng c vi nc nhit cao (5) Sai, Hg l kim loi cú nhit núng chỏy thp nht (6) Sai, Thờm HCl d vo dung dch Na2CrO4 thỡ dung dch chuyn sang mu xanh lc (CrCl 3) HCl + Na2CrO4 NaCl + CrCl3 + Cl2 + H2O Cõu 31: Chn C - Dung dch Y gm Fe3+, H+(d), K+, SO42- v NO3- Xột phn I : Ta cú n H (dư) n NaOH 3n Fe(OH)3 0,15mol T d kin bi cho ta cú h sau : 56n 16n m 56x 16y 33,2 x 0, 45 Fe O P1 2n O 4n NO 2n NO2 n KHSO4 n HNO3 n H (dư) 2y 10z 1,5 y 0,5 BT:e 3x 2y 7z z 0,05 3n Fe 2n O 3n NO n NO2 - Khi cho phn II tỏc dng vi Ba(OH) thỡ m 233n BaSO4 107n Fe(OH)3 233.0,6 107.0,225 163,875(g) Cõu 32: Chn B - Quy i hn hp X thnh Ca, Mg v O Theo d kin bi ta cú h sau : 40n Ca 24n Mg 16n O m X 40n Ca 24n Mg 16n O 5,36 n Ca 0,07 mol BT:e 2n Ca 2n Mg 2n O 2n H2 2n Ca 2n Mg 2n O 0,145 n Mg 0,065mol n n n 0,065 n 0,0625mol MgCl O Mg Mg Vy n CaCl n Ca 0,07 mol m CaCl 7,77(g) Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 Cõu 33: Chn C - Xột quỏ trỡnh t m gam cht bộo ta cú : BTKL m chất béo 44n CO2 18n H2O 32n O2 17,72(g) 2n CO2 n H2O 2n O2 n 0,12 mol n chất béo O 0,02 mol 16 - Khi cho m gam cht bộo tỏc dng vi NaOH thỡ n NaOH 3n C 3H5 (OH)3 3n chất béo 0,06 mol BT:O nO BTKL m muối m chất béo 40n NaOH 92n C 3H5 (OH)3 18,28(g) Cõu 34: Chn B (X), (Y) v (T) cú dng ln lt l NH 2RCOOH, NH2RCOONH4 v NH2RCOOR Cõu 35: Chn B t C H 5OOC [CH ]4 COOH(X) 2NaOH NaOOC [CH ]4 COONa(X1 ) C H 5OH(X ) H O NaOOC [CH ]4 COONa(X1 ) H 2SO HOOC [CH ]4 COOH(X ) t ,xt HOOC [CH ]4 COOH(X ) NH [CH ]6 NH ( NH [CH ]6 NHCO [CH ]4 CO )n (X ) t , H 2SO HOOC [CH ]4 COOH(X ) 2C H 5OH(X ) C H 5OOC [CH ]4 COOC H (X ) Cõu 36: Chn D C6H5NH2 C6H12O6 (glucozo) C6H5OH C6H12O6 (fructozo) Nc Br2 Nht mu Khụng phn ng Dd AgNO3/NH3 Khụng phn ng Khụng phn ng Dd NaOH Khụng phn ng Khụng phn ng Phn ng Khụng phn ng Cõu 37: Chn C - Khi t 8,85 gam hn hp E thỡ : m 32n O2 m H2O BTKL n CO2 E 0,385mol 44 n O(trong X) m 12n CO2 2n H2O n O(trong X) X 0,23mol n COO 0,115mol 16 n - Cho E tỏc dng vi NaOH nhn thy rng NaOH nờn E cú cha este X c to thnh n COO phenol (hoc ng ng) n nX 0,05mol (1) - Khi ú n X n NaOH n COO 0,015mol n Y n Z COO 4,04 - Xột hn hp ancol ta cú n ancol 2(n Y n Z ) 0,1mol M ancol 40, Vy hn hp ancol gm 0,1 CH3OH v C2H5OH n CH3OH n C H 5OH 0,1 n CH 3OH 0,04 mol (2) - Ta cú h sau 32n CH3OH 46n C H 5OH 4,04 n C 2H 5OH 0,06 mol n n - T (1) v (2) ta suy n Y CH3OH 0,02 mol n Z C 2H5OH 0,03mol 2 - Xột TH1 : X l HCOOC6H5 - Khi ú ta cú n Y C Y n Z C Z n CO2 7n X 0,02C Y 0,03C Z 0,28 C Y C Z - X, Y v Z ln lt l HCOOC6H5 (0,015 mol) CH2(COOCH3) (0,02 mol) v (COOC2H5) (0,03 mol) BTKL m T m E 40n NaOH 18n H2O mancol 9,74(g) Vy %m CH (COONa)2 0,02.148 100 30,39 9,74 Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 Ta khụng xột cỏc trng hp cũn li vỡ trng hp trờn ó tha Cõu 38: Chn D nX - Cho X tỏc dng vi NaOH ta nhn thy : n NaOH - X mch h, cho X tỏc dng vi NaOH ch thu c ancol Z nht T hai d kin ta suy X l este hai chc c to t ancol hai chc 6,2 - Ta cú M Z 62 , vy Z l C2H4(OH)2 0,1 19,6 - Xột mui T ta cú : n T n NaOH 0, mol M T 98vy CTCT ca T l HOCH2COONa 0, Khi ú CTCT ca X l HOCH COOCH CH OOC CH OH (1) ỳng, X cú nhúm chc este (2) ỳng, X cú nhúm hiroxyl (3) ỳng, X cú cụng thc phõn t la C 6H10O6 (4) Sai, X khụng cú kh nng tham gia phn ng gng Vy cú nhn nh ỳng l (1), (2) v (3) Cõu 39: Chn B Khi t hn hp E thỡ : n BT:O n O (trong X) 2n CO2 n H 2O 2n O2 0,08 mol n E O 0,04 mol n CO2 : 2n H2O : n O : : vy CTPT ca E l C8H8O2 - Theo bi thỡ cho E tỏc dng vi NaOH hn hp rn ch thu c mui - T hai d kin trờn suy hn hp E gm HCOOCH2C6H5 v HCOOC6H4CH3 Ta cú h sau : n HCOOC 6H 4CH3 n HCOOCH 2C 6H n E n HCOOC 6H 4CH n HCOOCH 2C 6H 0,2 n HCOOC 6H 4CH3 0,15mol 2n HCOOC H 4CH3 n HCOOCH 2C 6H n NaOH 2n HCOOC 6H 4CH n HCOOCH 2C 6H 0,35 n HCOOCH2 C H5 0,05mol Vy %m HCOOC6H4CH3 56,67 v %m HCOOCH2C6H5 43,33 Cõu 40: Chn B - Quy i hn hp X thnh C2H3ON (a mol), CH2 (b mol) v H2O (c mol) (Vi n C H3ON n Ala n Gly , n CH2 n Ala v n H2O n A n B ) a mol b mol a mol c mol a mol b mol b mol a mol C H 3ON ,CH , H O C H O NNa ,CH C H O NCl,CH , NaCl NaOH m (g) X HCl (m + 12,24)(g) Y 63,72 (g) muối Z - Khi cho Y tỏc dng vi HCl thỡ : n C H6 O2 NCl n NaCl n HCl 2a 0,72 a 0,36 m Z 58,5n NaCl 111,5nC2 H6 O2 NCl 0,18 mol n Gly n C2 H3 ON n Ala 0,18 mol 14 - Xột hn hp Y ta cú : m Y 97n C 2H 4O2NNa 14n CH2 m 12,24 0,36.97 14.0,18 m 25,2(g) + n CH2 n Ala m 57n C 2H3ON 14n CH2 0,12 mol n A n B 0,06 mol 18 n nB - Gi k l s mc xớch ca A, xột X ta cú : k C H3ON Vy A l pentapeptit nX - Theo bi thỡ MA > 4MB T d kin trờn ta suy A l (Gly) 2(Ala)3 (0,06 mol) v B l Gly (0,06 mol) A Sai, (Gly)2(Ala)3 (A) cú liờn kt peptit phõn t B ỳng, (Gly)2(Ala)3 (A) cú cha 20,29% Nit v lng n H 2O n A n B Tn Thnh Hong Phan Trang Luyn thi theo chuyờn - Nhúm Chuyờn GNL 2017 C Sai, (Gly)2(Ala)3 (A) cú gc amino axit phõn t D Sai, N chim 18,67 phn trm lng ca Gly HT Tn Thnh Hong Phan Trang 10 ... Ala 0 ,18 mol 14 - Xột hn hp Y ta cú : m Y 97n C 2H 4O2NNa 14 n CH2 m 12 ,24 0,36.97 14 .0 ,18 m 25,2(g) + n CH2 n Ala m 57n C 2H3ON 14 n CH2 0 ,12 mol n A n B 0,06 mol 18 n nB - Gi... 0,1mol 0,2 mol 0,1mol Vy m rắn khan 82n CH3COONa 40n NaOH(dư) 12 ,2 (g) Cõu 25: Chn A - Gi x l s mol ca Cu ú ta cú n Cu n Cu(NO3 )2 x mol - Theo thỡ C%Cu(NO3 )2 18 8n Cu(NO3 )2 18 8x 10 0 10 0... Mantoz D saccaroz Cõu 16 : un núng 37,5 gam dung dch glucoz vi lng AgNO 3/dung dch NH3 d, thu c 6,48 gam bc Nng % ca dung dch glucoz l A 11 ,4% B 14 ,4% C 13 ,4% D 12 ,4% Cõu 17 : S hp cht l ng phõn