AMINO AXIT CHUYEN DE BAI TAP HOA 12

CC DNG BI TP AMINO AXIT Dng 1: Lý thuyt tng hp Cõu 1: 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 2: Cú cht lng benzen, anilin, stiren, ng riờng bit l mt nhón Thuc th phõn bit cht lng trờn l A dung dch phenolphtalein B nc brom C dung dch NaOH D giy quỡ tớm Cõu 3: Dóy gm cỏc cht u lm giy qu tớm m chuyn sang mu xanh l: A anilin, metyl amin, amoniac B amoni clorua, metyl amin, natri hiroxit C anilin, amoniac, natri hiroxit D metyl amin, amoniac, natri axetat Cõu 4: Phỏt biu khụng ỳng l: A Axit axetic phn ng vi dung dch NaOH, ly dung dch mui va to cho tỏc dng vi khớ CO2 li thu c axit axetic B Phenol phn ng vi dung dch NaOH, ly mui va to cho tỏc dng vi dung dch HCl li thu c phenol C Anilin phn ng vi dung dch HCl, ly mui va to cho tỏc dng vi dung dch NaOH li thu c anilin D Dung dch natri phenolat phn ng vi khớ CO2, ly kt ta va to cho tỏc dng vi dung dch NaOH li thu c natri phenolat Cõu 5: Cho cỏc cht: etyl axetat, anilin, ancol (ru) etylic, axit acrylic, phenol, phenylamoni clorua, ancol (ru) benzylic, p-crezol Trong cỏc cht ny, s cht tỏc dng c vi dung dch NaOH l A B C D Cõu 6: Cú cht lng benzen, anilin, stiren, ng riờng bit l mt nhón Thuc th phõn bit cht lng trờn l A giy quỡ tớm B nc brom C dung dch NaOH D dd phenolphtalein Cõu 7: Phỏt biu khụng ỳng l: A Trong dung dch, H2N-CH2-COOH cũn tn ti dng ion lng cc [NH3+-CH 2-COO ] B Aminoaxit l nhng cht rn, kt tinh, tan tt nc v cú v ngt C Aminoaxit l hp cht hu c chc, phõn t cha ng thi nhúm amino v nhúm cacboxyl D Hp cht H2 N-CH2-COOH3N-CH3 l este ca glyxin (hay glixin) Cõu 8: Cú cỏc dung dch riờng bit sau: C6H5-NH3Cl (phenylamoni clorua), H2N-CH2-CH2-CH(NH2 )-COOH, ClH3N-CH2COOH, HOOC-CH2-CH2-CH(NH2)-COOH, H2N-CH2-COONa S lng cỏc dung dch cú pH < l A B C D Cõu 9: un núng cht H2N-CH2-CONH-CH(CH3)-CONH-CH2-COOH dung dch HCl (d), sau cỏc phn ng kt thỳc thu c sn phm l: A H2N-CH2-COOH, H2N-CH2-CH2-COOH B H3N-CH2-COOHCl , H3N+-CH2-CH2-COOHClC H3N+-CH2-COOHCl-, H3N+-CH(CH3)-COOHCl D H2N-CH2-COOH, H2N-CH(CH3)-COOH Cõu 10: Cho dóy cỏc cht: CH4, C2H2, C2H4 , C2H5OH, CH2=CH-COOH, C6H5 NH2 (anilin), C6H5OH (phenol), C6H6 (benzen) S cht dóy phn ng c vi nc brom l A B C D Cõu 11: Cho dóy cỏc cht: C6H5OH (phenol), C6H5NH2 (anilin), H2NCH2COOH, CH3CH2COOH, CH3CH2CH2NH2 S cht dóy tỏc dng c vi dung dch HCl l: A B C D Cõu 12: Cho dóy cỏc cht: CH4, C2H2, C 2H4, C 2H5 OH, CH2=CH-COOH, C6H5NH2 (anilin), C6H5 OH (phenol), C6H6 (benzen) S cht dóy phn ng c vi nc brom l A B C D Cõu 13: Cho dóy cỏc cht: phenol, anilin, phenylamoni clorua, natri phenolat, etanol S cht dóy phn ng c vi NaOH (trong dung dch) l A B C D Cõu 14: Cho dóy cỏc cht: C6H5OH (phenol), C6H5 NH2 (anilin), H2NCH2COOH, CH3CH2COOH, CH3CH2CH2 NH2 S cht dóy tỏc dng c vi dung dch HCl l A B C D Cõu 15: Thuc th c dựng phõn bit Gly-Ala-Gly vi Gly-Ala l : A Cu(OH)2 mụi trng kim B dung dch NaCl C dung dch HCl D dung dch NaOH Cõu 16: Cho tng cht H2NCH2COOH, CH3COOH, CH3COOCH3 ln lt tỏc dng vi dung dch NaOH v vi dung dch HCl, s phn ng xy l: A B C D Cõu 17: Cú ba dung dch: amoni hirocacbonat, natri aluminat, natri phenolat v ba cht lng: ancol etylic, benzen, anilin ng sỏu ng nghim riờng bit Nu ch dựng mt thuc th nht l dung dch HCl thỡ nhn bit c ti a bao nhiờu ng nghim? A B C D -1- Cõu 18: Phỏt biu no sau õy l ỳng? A Cỏc ancol a chc u phn ng vi Cu(OH)2 to dung dch mu xanh lam B Etylamin phn ng vi axit nitr nhit thng, sinh bt khớ C Benzen lm mt mu nc brom nhit thng D Anilin tỏc dng vi axit nitr un núng, thu c mui iazoni Cõu 19: Cht X cú cụng thc phõn t C3H7O2N v lm mt mu dung dch brom Tờn gi ca X l A metyl aminoaxetat B axit -aminopropionic C axit -aminopropionic D amoni acrylat Cõu 20: Dóy ch cha nhng amino axit cú s nhúm amino v s nhúm cacboxyl bng l A Gly, Ala, Glu, Tyr B Gly, Val, Tyr, Ala C Gly, Val , Lys, Ala D Gly, Ala, Glu, Lys Cõu 21: Cho 29.8 gam hn hp amin n chc k tip tỏc dng ht vi dung dch HCl, lm khụ dung dch thu c 51,7 gam mui khan Cụng thc phõn t amin l A CH5N v C2H7N B C2H7N v C3 H9N C C3H9N v C4H11N D C3H7N v C4H9 N Cõu 22: ng vi cụng thc phõn t C2H7O2N cú bao nhiờu cht va phn ng c vi dung dch NaOH, va phn ng c vi dung dch HCl? A B C D Cõu 23: S amin thm bc mt ng vi cụng thc phõn t C7H9N l A B C D Cõu 24: Cú bao nhiờu tripeptit (mch h) khỏc loi m thu phõn hon ton u thu c aminoaxit: glyxin, alanin v phenylalanin? A B C D Cõu 25: Phỏt biu ỳng l A Khi thu phõn n cựng cỏc protein n gin s cho hn hp cỏc -aminoaxit B Khi cho dung dch lũng trng trng vo Cu(OH)2 thy xut hin phc mu xanh m C Enzim amilaza xỳc tỏc cho phn ng thu phõn xenluloz thnh mantoz D Axit nucleic l polieste ca axit photphoric v glucoz Cõu 26: Cỏc dung dch phn ng c vi Cu(OH)2 nhit thng l A glixeron, axit axetic, glucoz B lũng trng trng, fructoz, axeton C anờhit axetic, saccaroz, axit axetic D fructoz, axit acrylic, ancol etylic Cõu 27: Cho cỏc cht sau: phenol, khớ sunfur, toluen, ancol benzylic, isopren, axit metacrylic, vinyl axetat, phenyl amin, axit benzoic S cht phn ng c vi dung dch nc brom nhit thng l A B C D Cõu 28: Dóy gm cỏc cht u cú kh nng lm i mu dung dch quỡ tớm l A CH3NH2, C2H5NH2, HCOOH B C6H5NH2 , C2H5 NH2, HCOOH C CH3NH2, C2H5NH2, H2N-CH2-COOH D CH3NH2, C6H5OH, HCOOH Cõu 29: Cho cỏc cht C4H10O,C4H9Cl,C4H10,C4H11N S ng phõn cu to ca cỏc cht gim theo th t l A C4H11N, C4H10O, C4H9Cl, C4H10 B C4H10O, C4H9Cl, C4H11N, C4H10 C C4H10O, C4H9Cl, C4H10, C4H11N D C4H10O, C4H11 N, C4H10, C4H9Cl Cõu 30 Cho s sau: KOH o CH3XOH X (C4H9O2N) NaOH, t X01 HCl dX2 H2N-CH2COOK HCl khan Vy X2 l: A H2N-CH2-COOH B ClH3N-CH2COOH C H2N-CH2-COONa D H2N-CH2-COOC2H5 Cõu 31 Cho cỏc cht lng C2H5OH, C6H5OH, C6H5NH2, cỏc dung dch C6H5ONa, NaOH, CH3COOH, HCl Cho cỏc cht trờn tỏc dng vi tng ụi mt iu kin thớch hp S cp cht xy phn ng hoỏ hc l A B 10 C 11 D Cõu 32: Cho thớ nghim sau (phn ng xy hon ton) - Cho etylamin tỏc dng vi lng d dd {NaNO2 + HCl} - Cho etylamin tỏc dng vi CH3I theo t l mol 1:1 - Cho nitrobenzen tỏc dng vi hn hp {Fe + dd HCl} d - Cho NH3 d tỏc dng vi C2H5I - Cho anilin tỏc dng vi dd HCl d - Thu phõn hon ton protein n gin S thớ nghim thu c amin l: A B C D Cõu 33: Khi vit ng phõn ca C4 H11N v C4H10O mt HS nhn xột: S ng phõn ca C4H10O nhiu hn s ng phõn C4H11N C4H11N cú ng phõn amin bc I C4H11N cú ng phõn amin bc II C4H11N cú ng phõn amin bc III C4H10O cú ng phõn ancol no v ete no Nhn xột ỳng gm: A 1, 2, 3, B 2, 3, C 3, 4, D 2, 3, 4, Cõu 34: C7H9N cú s ng phõn cha nhõn thm l A B C D -2- Cõu 35: S ng phõn cu to amino axit cú CTPT C4H9 O2N l A B C D Cõu 36 Cho glyxin tỏc dng vi axit glutamic to ipeptit mch h S lng ipeptit cú th to l: A B C D Cõu 37: Chn cõu sai A Oligopeptit gm cỏc peptit cú t n 10 gc -amino axit B Liờn kt ca nhúm CO vi nhúm NH gia n v -amino axit c gi l liờn kt peptit C Polipeptit gm cỏc peptit cú t 10 n 50 gc -amino axit D Peptit l nhng hp cht cha t n 50 gc -amino axit liờn kt vi bng cỏc liờn kt peptit Cõu 38: Cho cỏc hp hu c thuc: Ankaien Anken Ankin Ancol khụng no (cú liờn kt ụi) mch h, hai chc Anehit no, mch h, hai chc Axit khụng no (cú liờn kt ụi), mch h, n chc Amino axit (cú mt nhúm chc amino v nhúm chc cacboxyl), no, mch h Tng s cỏc loi hp cht hu c trờn tho cụng thc CnH2n-2OxNy (x, y thuc nguyờn) l A B C D Cõu 39: Cho cỏc cht A (C4H10), B (C4H9Cl), C (C4 H10O), D (C4H11N) Nguyờn nhõn gõy s tng s lng cỏc ng phõn t A n D l A Húa tr ca cỏc nguyờn t th tng lm tng th t liờn kt phõn t B õm in khỏc ca cỏc nguyờn t C Cacbon cú th to nhiu kiu liờn kt khỏc D Khi lng phõn t khỏc Cõu 40: Cho cỏc cht A (C4H10), B (C4 H9Cl), C (C4H10O), D (C4H11N) S lng cỏc ng phõn ca A, B, C, D tng ng l A 2; 4; 6; B 2; 3; 5; C 2; 4; 7; D 2; 4; 5; Dng 2: Amino axit tỏc dng vi axit hoc baz Cõu 1: Hn hp X gm mol aminoaxit no, mch h v mol amin no, mch h X cú kh nng phn ng ti a vi mol HCl hoc va vi mol NaOH t chỏy hon ton X thu c mol CO2, x mol H2O v y mol N2 Cỏc giỏ tr x, y tng ng l A v 1,0 B v 1,5 C v 1,0 D v 1,5 Cõu 2: a) Hn hp X gm alanin v axit glutamic Cho m gam X tỏc dng hon ton vi dung dch NaOH (d), thu c dung dch Y cha (m + 30,8) gam mui Mt khỏc, nu cho m gam X tỏc dng hon ton vi dung dch HCl, thu c dung dch Z cha (m + 36,5) gam mui Giỏ tr ca m l A 112,2 B 165,6 C 123,8 D 171,0 b) Hn hp X gm glyxin v Lysin Cho m gam X tỏc dng hon ton vi dung dch NaOH (d), thu c dung dch Y cha (m + 22) gam mui Mt khỏc, nu cho m gam X tỏc dng hon ton vi dung dch HCl, thu c dung dch Z cha (m + 51,1) gam mui Giỏ tr ca m l : A 112,2 g B 103,4 g C 123,8 g D 171,0 g Cõu 3: Cho 0,02 mol amino axit X tỏc dng va vi 200 ml dung dch HCl 0,1M thu c 3,67 gam mui khan Mt khỏc 0,02 mol X tỏc dng va vi 40 gam dung dch NaOH 4% Cụng thc ca X l A H2NC2H3(COOH)2 B H2NC3H5(COOH)2 C (H2N)2C3H5COOH D H2NC3H6COOH Cõu 4: Cho mol amino axit X phn ng vi dung dch HCl (d), thu c m1 gam mui Y Cng mol amino axit X phn ng vi dung dch NaOH (d), thu c m2 gam mui Z Bit m2- m1 = 7,5 Cụng thc phõn t ca X l : A C4H10O2N2 B C5 H9O4N C C4H8O4N2 D C5H11 O2N Cõu 5: Trong phõn t aminoaxit X cú mt nhúm amino v mt nhúm cacboxyl Cho 15,0 gam X tỏc dng va vi dung dch NaOH, cụ cn dung dch sau phn ng thu c 19,4 gam mui khan Cụng thc ca X l: A H2NC4 H8COOH B H2NC3H6COOH C H2NC2H4COOH D H2NCH2COOH Cõu 6: - aminoaxit X cha mt nhúm -NH2 Cho 10,3 gam X tỏc dng vi axit HCl (d), thu c 13,95 gam mui khan Cụng thc cu to thu gn ca X l: A H2NCH2COOH B H2NCH2CH2COOH C CH3CH2CH(NH2)COOH D CH3CH(NH2)COOH Cõu 7: -amino axit X cha mt nhúm NH2 Cho 10,3 g X tỏc dng vi axit HCl (d), thu c 13,95 g mui khan CTCT thu gn ca X l A CH3CH2CH(NH2)COOH B H2NCH2 CH2COOH C CH3CH(NH2)COOH D H2NCH2COOH Cõu 8: Cho mt -amino axit X cú mch cacbon khụng phõn nhỏnh - Ly 0,01mol X phn ng va vi dd HCl thu c 1,835g mui - Ly 2,94g X phn ng va vi dd NaOH thu c 3,82g mui Xỏc nh CTCT ca X? A CH3CH2CH(NH2)COOH B HOOCCH2CH2CH(NH2)COOH C HCOOCH2CH(NH2)CH2COOH D HOOCCH2CH2CH2CH(NH2)COOH Cõu 9: X l mt amino axit no ch cha nhúm NH2 v nhúm COOH Cho 15,1 g X tỏc dng vi HCl d thu c 18,75 g mui CTCT ca X l A H2N-CH2-COOH B CH3-CH(NH2)-COOH -3- C C6H5-CH(NH2)-COOH D C3H7-CH(NH2)-COOH Cõu 10: Trung ho mol -amino axit X cn mol HCl to mui Y cú hm lng clo l 28,286% v lng CTCT ca X l A H2N-CH2-CH(NH2)-COOH B H2N-CH2 -COOH C CH3-CH(NH2)-COOH D H2N-CH2-CH2-COOH Cõu 11: Hp cht Y l - amino axit Cho 0,02 mol Y tỏc dng va vi 80 ml dd HCl 0,25M Sau ú cụ cn c 3,67 gam mui Mt khỏc trung ho 1,47 gam Y bng lng va dd NaOH, cụ cn dd thu c 1,91 gam mui Bit Y cú cu to mch khụng nhỏnh CTCT ca Y l: A H2N CH2 CH2 COOH B CH3 CH(NH2) COOH C HOOC CH2 CH2 CH(NH2) COOH D HOOC CH2 CH(NH2) COOH Cõu 12: Amino axit X mch khụng nhỏnh cha a nhúm COOH v b nhúm NH2 Khi cho mol X tỏc dng ht vi dd NaOH thu c 144 gam mui CTPT ca X l: A C3H7 NO2 B C4H7NO4 C C4H6N2 O2 D C5H7 NO2 Cõu 13: Cht A cú phn trm lng cỏc nguyờn t C,H, O, N ln lt l 32,00%, 6,67%, 42,66%, 18,67% T hi ca A so vi khụng khớ nh hn A va tỏc dng vi dd NaOH va tỏc dng vi dd HCl CTCT ca A l: A CH3-CH(NH2)-COOH B H2N-(CH2)2-COOH C H2N-CH2-COOH D H2N-(CH2)3-COOH Cõu 14: Cht A cú phn trm cỏc nguyờn t C,H, N, O ln lt l 40,45%, 7,86%, 15,73%, cũn li l O Khi lng mol phõn t ca A nh hn 100g/mol A va tỏc dng vi dd NaOH va tỏc dng vi dd HCl, cú ngun gc t thiờn nhiờn Cụng thc B H2N-(CH2)2-COOH C H2 N-CH2-COOH D H2Ncu to ca A l: A CH3-CH(NH2)-COO (CH2)3-COOH Cõu 15: un 100ml dung dch mt aminoaxit 0,2M tỏc dng va vi 80ml dd NaOH 0,25M Sau phn ng ngi ta chng khụ dung dch thu c 2,5g mui khan Mt khỏc, li ly 100g dung dch aminoaxit núi trờn cú nng 20,6% phn ng va vi 400ml dung dch HCl 0,5M CTPT ca aminoaxit: A H2NCH2COOH B H2NCH2CH2COOH C H2N(CH2)3COOH D a v c ỳng Cõu 16: Trong phõn t aminoaxit X cú mt nhúm amino v mt nhúm cacboxyl Cho 15,0 gam X tỏc dng va vi dung dch NaOH, cụ cn dung dch sau phn ng thu c 19,4 gam mui khan Cụng thc ca X l A H2NC4H8COOH B H2NC3H6COOH C H2NC2H4COOH D H2NCH2COOH Cõu 17: Hp cht hu c X ch cha hai loi nhúm chc amino v cacboxyl Cho 100ml dung dch X 0,3M phn ng va vi 48ml dd NaOH 1,25M Sau ú em cụ cn dung dch thu c c 5,31g mui khan Bớờt X cú mch cacbon khụng phõn nhỏnh v nhúm NH2 v trớ alpha CTCT ca X: A CH3CH(NH2)COOH B CH3C(NH2)(COOH)2 C CH3CH2C(NH2)(COOH)2 D CH3CH2CH(NH2)COOH Cõu 18: un núng 100 ml dung dch amino axit 0,2 M tỏc dng va vi 80 ml dung dch NaOH 0,25 M hoc vi 80 ml dung dch HCl 0,5 M Cụng thc phõn t ca amino axit l: A (H2N)2C2H3 -COOH B H2N-C2H3 (COOH)2 C (H2N)2C2H2(COOH)2 D H2N-C2H4-COOH Cõu 19: Cho 15 gam hn hp amino axit tỏc dng va vi dung dch HCl 1,2 M thỡ thu c 18,504 gam mui V y th tớch dung dch HCl phi dựng l: A 0,8 lớt B 0, 08 lớt C 0,4 lớt D 0,04 lớt Cõu 20: X l mt amino axit no ch cha mt nhúm COOH v nhúm NH2 Cho 2,06 gam X phn ng va vi NaOH, cụ cn dung dch sau phn ng thu c 2,5 g mui Vy cụng thc ca X l: A H2N-CH2-COOH B CH3-CH(NH2)COOH C CH3 -CH(NH2)CH2COOH D C3H7CH(NH2)COOH Cõu 21: Cho 22,15 g mui gm CH2NH2COONa v CH2NH2CH2 COONa tỏc dng va vi 250 ml dung dch H2SO4 1M Sau phn ng cụ cn dung dch thỡlng cht rn thu c l : A 46,65 g B 45,66 g C 65,46 g D Kết khác Câu 22: Cho 4,41 g aminoaxit X tác dụng với dung dịch NaOH d cho 5,73 g muối Mặt khác lợng X nh trờn nu cho tác dụng với dung dịch HCl d thu đợc 5,505 g muối cloruA Xỏc nh CTCT X A HOOC-CH2CH2CH(NH2)COOH B CH3CH(NH2)COOH C HOOCCH2CH(NH2)CH2COOH D Cả A B Cõu 23: Cho mol amino axit X phn ng vi dung dch HCl (d), thu c m1 gam mui Y Cng mol amino axit X phn ng vi dung dch NaOH (d), thu c m2 gam mui Z Bit m2 - m1 = 7,5 Cụng thc phõn t ca X l A C4H10O2N2 B C5 H9O4N C C4H8O4N2 D C5H11 O2N Cõu 24: Cho 0,02 mol amino axit X tỏc dng va vi 200 ml dung dch HCl 0,1M thu c 3,67 gam mui khan Mt khỏc 0,02 mol X tỏc dng va vi 40 gam dung dch NaOH 4% Cụng thc ca X l A H2NC2H3(COOH)2 B H2NC 3H5(COOH)2 C (H2N)2C3H5COOH D H2NC 3H6COOH Cõu 25: Cho 2.46 gam hn hp gm HCOOH, CH3COOH, C6H5OH, H2NCH2COOH tỏc dng va vi 40 ml dung dch NaOH 1M Tng lng mui khan thu c sau phn ng l A 3,52 gam B 6,45 gam C 8,42 gam D 3,34 gam Cõu 26: Cho 0,15 mol H2NC3H5(COOH)2 (axit glutamic) vo 175 ml dung dch HCl 2M, thu c dung dch X Cho NaOH d vo dung dch X Sau cỏc phn ng xy hon ton, s mol NaOH ó phn ng l A 0,50 B 0,65 C 0,70 D 0,55 Cõu 27 Amino axit mch khụng phõn nhỏnh X cha a nhúm -COOH v b nhúm -NH2 Khi cho 1mol X tỏc dng ht vi axit -4- HCl thu c 169,5 gam mui Cho mol X tỏc dng ht vi dung dch NaOH thu c 177 gam mui.CTPT ca X l A C4H7NO4 B C3H7NO2 C C4H6N2O2 D C5H7NO2 Cõu 28 Cho 0,1 mol -amino axit X tỏc dng va vi 50 ml dung dch HCl 2M Trong mt thớ nghim khỏc, cho 26,7 gam X vo dung dch HCl d, sau ú cụ cn cn thn dung dch thu c 37,65 gam mui khan Vy X l: A Alanin B Axit glutamic C Valin D Glyxin Cõu 29 Hp cht X cha vũng benzen, cú cụng thc phõn t CxHyN Khi cho X tỏc dng vi dung dch HCl thu c mui Y cú cụng thc dng RNH3Cl (R l gc hirocacbon) Phn trm lng ca nit X l 13,084% S ng phõn cu to ca X tha cỏc iu kin trờn l A B C D Cõu 30: Cho 25,65 gam mui gm H2NCH2COONa v H2NCH2CH2COONa tỏc dng va vi 250 ml dung dch H2SO4 1M Sau phn ng cụ cn dung dch thỡ lng mui H2NCH2COONa to thnh l: A 29,25 gam B 18,6 gam C 37,9 gam D 12,4 gam Cõu 31: Cho 0,02 mol cht X (X l mt -aminoaxit) phn ng va ht vi 160ml dd HCl 0,125 M thỡ to 3,67g mui Mt khỏc, 4,41g X tỏc dng vi mt lng NaOH va thỡ to 5,73g mui khan Bit X cú mch cacbon khụng phõn nhỏnh Vy cụng thc cu to ca X l : A HOOC-CH(NH2)-CH(NH2)-COOH B CH3-CH2-CH(NH2 )-COOH C HOOC-CH2-CH2-CH(NH2 )-COOH D CH3-CH2 -CH2-CH(NH2)-COOH Cõu 32: Cho 0,02 mol amino axit X tỏc dng va vi 200ml dung dch HCl 0,1M c 3,67gam mui khan Mt khỏc 0,02mol X tỏc dng va vi 40gam dung dch NaOH 4% S cụng thc cu to ca X l: A B C D Cõu 33: Cht X l mt aminoaxit Cho 100ml dung dch X 0,02M phn ng va ht vi 160ml dung dch NaOH 0,25M Cụ cn dung dch sau phn ng ny thỡ c 3,82g mui khan Mt khỏc X tỏc dng vi HCl theo t l 1:1 Cụng thc phõn t ca X l: A C3H7NO2 B C4 H7NO4 C C5H11NO4 D C5H9 NO4 Cõu 34: Cho m gam hn hp X gm axit glutamic v alanin tỏc dng vi dung dch HCl d Sau phn ng lm bay hi cn thn dung dch thu c (m + 11,68) gam mui khan Nu cho m gam hn hp X tỏc dng vi dung dch KOH va , sau phn ng lm bay hi cn thn dung dch thu c (m + 19) gam mui khan Giỏ tr ca m l: A 38,92 gam B 35,4 gam C 36,6 gam D 38,61 gam Cõu 35: Dung dch X cha 0,01 mol ClH3N-CH2-COOH, 0,02 mol CH3-CH(NH2)COOH; 0,05 mol H COOC6 H5 Cho dung dch X tỏc dng vi 160 ml dung dch KOH 1M un núng phn ng xy hon ton Cụ cn dung dch sau phn ng thu c m gam cht rn khan Giỏ tr ca m l: A 12,535 gam B 16,335 gam C 8,615 gam D 14,515 gam Cõu 36: Hn hp X gm amino axit no, mch h Ly 8,9 gam X cho tỏc dng vi dung dch HCl d c a gam mui, cng lng 8,9 gam X tỏc dng vi dung dch NaOH d thỡ lng mui thu c l (a 1,45) gam Hai amino axit ú l A NH2C4H8COOH v NH2 C3H6COOH B NH2CH2COOH v NH2C2H4COOH C NH2C2H4COOH v NH2 C3H6COOH D NH2CH2COOH v NH2C3 H6COOH Cõu 37: -aminoaxit X cha mt nhúm -NH2 Cho 10,3 gam X tỏc dng vi axit HCl (d), thu c 13,95 gam mui khan Cụng thc cu to thu gn ca X l A H2NCH2COOH B H2NCH2CH2COOH C CH3CH2CH(NH2)COOH D CH3CH(NH2)COOH Cõu 38: Trong phõn t aminoaxit X cú mt nhúm amino v mt nhúm cacboxyl Cho 15,0 gam X tỏc dng va vi dung dch NaOH, cụ cn dung dch sau phn ng thu c 19,4 gam mui khan Cụng thc ca X l A H2NC4 H8COOH B H2NC3H6COOH C H2NC2H4COOH D H2NCH2COOH Cõu 41: Hp cht hu c A cú 15,7303%N v 35,9551%O v lng A tỏc dng vi HCl ch to R(O)z-NH3Cl (R l gc hidrocacbon) Xỏc nh CTCT ca A Bit A tham gia phn ng trựng ngng Cõu 42: Cho mol amino axit X phn ng vi dung dch HCl (d), thu c m1 gam mui Y Cng mol amino axit X phn ng vi dung dch NaOH (d), thu c m2 gam mui Z Bit m2 - m1 = 7,5 Mt khỏc cho 0,01 mol A tỏc dng va vi dung dch HCl sau ú cụ cn cn thn thu c 1,835 gam mui Cụng thc ca X l : A H2NC2H3(COOH)2 B H2NC3H5(COOH)2 C (H2N)2C3H5COOH D H2NC3H6COOH Cõu 44: Cho dung dch X cú cha 0,01 mol Glixin, 0,02 mol ClH3N-CH2-COOH v 0,03 mol phenyl fomat tỏc dng vi 150 ml dung dch NaOH 1M un núng c dung dch Y Cụ cn dung dch Y thu c cht rn khan cú lng l A 9,6 gam B 6,12 gam C 11,2 gam D 11,93 gam Cõu 45: Cho 17,8 gam hn hp hai amino axit no cha mt chc -COOH v mt chc -NH2 (t l lng phõn t ca chỳng l 1,373) tỏc dng vi 110 ml dung dch HCl 2M, c dung dch A é tỏc dng ht cỏc cht dung dch A cn dựng 140 ml dung dch KOH 3M Phn trm s mol mi amino axit hn hp ban u bng A 25% v 75% B 50% v 50% C 20% v 80% D 40% v 60% Cõu 46: Cho m gam hn hp X gm axit glutamic v valin tỏc dng vi dung dch HCl (d), sau phn ng hon ton lm bay hi cn thn dung dch, thu c (m + 9,125) gam mui khan Nu cho m gam X tỏc dng vi dung dch NaOH (d), kt thỳc phn ng to (m + 7,7) gam mui Giỏ tr ca m l A 26,40 B 39,60 C 33,75 D 32,25 Dng 3: Amino axit tỏc dng vi axit hoc baz sau ú ly sn phm thu c tỏc dng vi baz hoc axit Cõu 1: Cho 0,15 mol H2NC3H5(COOH)2 (axit glutamic) vo 175 ml dung dch HCl 2M, thu c dung dch X Cho NaOH d -5- vo dung dch X Sau cỏc phn ng xy hon ton, s mol NaOH ó phn ng l : A 0,50 B 0,65 C 0,70 D 0,55 Cõu 2: 0,01 mol amino axit Y phn ng va vi 0,01 mol HCl c cht Z Cht Z phn ng va vi 0,02 mol NaOH Cụng thc ca Y cú dng l A H2NR(COOH)2 B H2NRCOOH C (H2N)2RCOOH D (H2N)2R(COOH)2 Cõu 3: Mt amino axit A cú cha nhúm chc amin, mt nhúm chc axit 100ml dd cú cha A vi nng 1M phn ng va vi 100ml dd HCl aM c dd X, dd X phn ng va vi 100ml dd NaOH bM Giỏ tr ca a, b ln lt l A 2; B 1; C 2; D 2; Cõu 3: Cho 0,2 mol amino axit X phn ng va vi 100 ml dung dch HCl 2M thu c dung dch A Cho dung dch A phn ng va vi dung dch NaOH, sau phn ng cụ cn sn phm thu c 33,9g mui X cú tờn gi l: A glixin B alanin C valin D axit glutamic Cõu 4: X l amino axit cú cụng thc tng quỏt dng H2N R COOH Cho 8,9 gam X tỏc dng vi 200 ml dd HCl 1M thu c dung dch Y phn ng ht vi cỏc cht dd Y cn dựng 300 ml dd NaOH 1M CTCT ỳng ca X l: A H2N CH2 COOH B H2N CH2 CH2 COOH C CH3 CH(NH2) COOH D CH3 CH2 CH(NH2) COOH Cõu 5: A l mt -amino axit mch cacbon khụng phõn nhỏnh Cho 0,1 mol A vo dung dch cha 0,25 mol HCl (d), c dung dch B phn ng ht vi dd B, cn va 300 ml dd NaOH 1,5 M un núng Nu cụ cn dung dch sau cựng, thỡ c 33,725 g cht rn khan A l: A Glixin B Alanin C axit glutamic D axit -amino butiric Cõu 6: Cho 0,1 mol amino axit phn ng va vi 200 ml dung dch HCl 0,5M, thu c dung dch X Cho dd NaOH 0,5M vo dung dch X thỡ thy cn dựng va ht 600ml Xỏc nh s nhúm chc amino -NH2 v cacboxyl - COOH ? Cõu 7: X l mt -amino axit cú cha vũng thm v mt nhúm NH2 phõn t Bit 50 ml dung dch X phn ng va vi 80 ml dung dch HCl 0,5M, dung dch thu c phn ng va vi 50 ml dung dch NaOH 1,6M Mt khỏc nu trung hũa 250 ml dung dch X bng lng va KOH ri em cụ cn thu c 40,6 gam mui CTCT ca X l: A C6H5-CH(CH3)-CH(NH2)COOH B C6H5-CH(NH2)-CH2COOH C C6H5-CH(NH2)-COOH D C6H5-CH2CH(NH2)COOH Cõu 8: Cho 0,1 mol alanin phn ng vi 100 ml dung dch HCl 1,5M thu c dung dch A Cho A tỏc dng va vi dung dch NaOH thu c dung dch B, lm bay hi dung dch B thu c bao nhiờu gam cht rn khan? A 14,025 gam B 8,775 gam C 11,10 gam D 19,875 gam Cõu 9: Cho 0,15 mol hn hp X gm hai aminoaxit : R(NH2)(COOH)2 v R(NH2)2(COOH) vo 200 ml dung dch HCl 1,0 M, thu c dung dch Y Y tỏc dng va ht vi 400 ml dung dch NaOH 1,0 M S mol ca R(NH2 )(COOH)2 0,15 mol X l A 0,1 mol B 0,125 mol C 0,075 mol D 0,05 mol Cõu 10: Cho 27,15 gam tyrosin tỏc dng vi 225 ml dung dch HCl 1M thu c dung dch X Cho X tỏc dng vi 600 ml dung dch NaOH 1M thu c dung dch Y Tng lng cht rn khan thu c cụ cn cn thn dung dch Y l A 40,9125 gam B 49,9125 gam C 52,6125 gam D 46,9125 gam Cõu 11: Ly 0,3 mol hn hp X gm H2NC3H5(COOH)2 v H2NCH2COOH cho vo 400ml dung dch HCl 1M thỡ thu c dung dch Y Y tỏc dng va vi 800ml dung dch NaOH 1M nthu c dung dch Z Lm bay hi Z thu c m gam cht rn khan, giỏ tr ca m l? A 52,2 gam B 55,2 gam C 28,8 gam D 31,8 gam Cõu 12: Cho m gam hn hp X gm hai -aminoaxit cựng s mol, u no mch h, cú nhúm amino v nhúm cacboxyl tỏc dng vi dd cha 0,44 mol HCl c dd Y Y td va ht vi dd cha 0,84 mol KOH t chỏy hon ton m gam X ri hp th sn phm chỏy bng dd KOH d thy lng bỡnh tng 65,6 g CTCT cht X l A H2NCH(C2H5 )COOH v H2NCH(CH3)COOH B H2NCH2COOH v H2NCH(CH3)COOH C H2NCH(C2H5)COOH v H2NCH2CH2COOH D H2NCH2 COOH v H2NCH(C2 H5)COOH Cõu 13: Cho -aminoaxit X ch cha mt chc NH2 tỏc dng vi 200ml dung dch NaOH 1M thu c dung dch Y Dung dch Y phn ng va vi 500ml dung dch HCl 1M thu c dung dch Z Cụ cn cn thn dung dch Z thu c 49,35 gam cht rn khan X l: A Valin B Lysin C Glyxin D Alanin Cõu 14: Cho 20,15 gam hn hp X gm glyxin v alanin phn ng vi 200 ml dung dch HCl 1M, thu c dung dch Y Dung dch Y phn ng va vi 450 ml dung dch NaOH 1M Thnh phn % v lng ca glyxin hn hp X l A 55,83% B 53,58% C 44,17% D 47,41% Cõu 15: Cho dung dch cha 0,01 mol mt aminoaxit A tỏc dng va vi 100ml dung dch HCl 0,1M thu c dung dch X , tỏc dng ht vi dung dch X cn ti thiu 300ml NaOH 0,1M, cụ cn dung dch sau phn ng thu c 2,845 gam cht rn A l: A Lysin B Axit glutamic C Tyrosin D Alanin Cõu 16: Cho 0,12 mol alanin tỏc dng va vi dung dch HCl thu c dung dch X Thờm vo dung dch X 300 ml dung dch NaOH 1M thu c dung dch Y Cụ cn dung dch Y thu c m gam cht rn khan Giỏ tr ca m l: A 17,70 gam B 22,74 gam C 20,10 gam D 23,14 gam Cõu 17: Cho 19,2 gam hn hp gm hai amino axit no cha mt chc axit v mt chc amin (t l lng phõn t ca chỳng l 1,373) tỏc dng vi 110 ml dung dch HCl 2M, c dung dch A tỏc dng ht vi cỏc cht dung dch A cn dựng 140 ml dung dch KOH 3M Phn trm s mol ca mi aminoaxit hn hp ban u bng: A 25% v 75% B 20% v 80% C 50% v 50% D 40% v 60% Cõu 18: Cho 13,35 g hn hp X gm CH2 NH2CH2COOH v CH3CHNH2 COOH tỏc dng v i V ml dung dch NaOH 1M thu c dung dch Y Bit dung dch Y tỏc dng va vi 250 ml dung dch HCl 1M Giỏ tr ca V l : -6- A 100 ml B 150 ml C 200 ml D 250 ml Cõu 19: Cho 20,15 g hn hp X gm (CH2NH2COOH v CH3 CHNH2COOH) tỏc dng vi 200 ml dung dch HCl 1M thu c dung dch Y Y tỏc dng va vi 450 ml dung dch NaOH.Phn trm lng cỏc cht X l A 55,83% v 44,17% B 53,58% v 46,42% C 58,53% v 41,47% D 52,59% v 47,41% Cõu 20 : Ly 20 ml amino axit X cú nhúm -NH2 phn ng vi 100 ml dung dch HCl 0,1M thu c dung dch Y Cho dung dch Y phn ng va vi 300 ml dung dch NaOH 0,1M Mt khỏc trung hũa ht 250 ml X bi KOH sau phn ng cụ cn sn phm thu c 26,125 g mui Xỏc nh cụng thc CT ca X ? Cõu 21: Ly m gam hn hp X gm hai amino axit cú nhúm -NH2 v nhúm -COOH phn ng vi 55 ml dung dch HCl 2M thu c dung dch Y tỏc dng ht vi cỏc cht dung dch Y cn dựng 70 ml dung dch KOH 3M Mt t chỏy hon ton m(g) X v cho sn phm chỏy qua dd KOH d thỡ lng bỡnh ny tng thờm 14,85 gam Bit t l phõn t gia hai amino axit l 1,187 Xỏc nh cụng thc CT ca X ? Cõu 22: Cho hn hp A gm ( 0,15 mol axit glutamic v 0,1 mol glyxin ) vo 175 ml dung dch HCl 2M, thu c dung dch X Cho NaOH d vo dd X Sau cỏc phn ng xy hon ton, s mol NaOH ó phn ng l A 0,80 B 0,60 C 0,75 D 0,65 Cõu 23: Cho m gam aminoaxớt (trong phõn t ch cha mt nhúm NH2 v mt nhúm COOH), tỏc dng vi 110ml dd HCl 2M c dd X phn ng ht vi cỏc cht dd X cn 200 gam dd NaOH 8,4% c dd Y, cụ can dd Y thỡ c 32,27 gam cht rn Cụng thc phõn t ca aminoaxớt trờn l: A NH2CH2COOH B NH2 C2H2COOH C NH2C2H4COOH D NH2C3H6COOH Cõu 24: Hn hp X gm aminoaxit (H2N)2R1COOH v H2NR2(COOH)2 cú s mol bng tỏc dng vi 550ml dung dch HCl 1M thu c dung dch Y Y tỏc dng va vi lớt dung dch NaOH 1M Vy to thnh dung dch Y thỡ ? A HCl v aminoaxit va B HCl d 0,1 mol C HCl d 0,3 mol D HCl d 0,25 mol Cõu 25: Hn hp M gm hai cht CH3COOH v NH2CH2COOH trung ho m gam hn hp M cn 100ml dung dch HCl 1M Ton b sn phm thu c sau phn ng li tỏc dng va vi 300ml dung dch NaOH 1M Thnh phn phn trm theo lng ca cỏc cht CH3COOH v NH2CH2 COOH hn hp M ln lt l ; A 61,54 v 38,46 B 72,80 v 27,20 C 44,44 v 55,56 D 40 v 60 Cõu 26: X l axit , iaminobutiric Cho dung dch cha 0,25 mol X tỏc dng vi 400 ml dung dch NaOH 1M, sau ú cho vo dung dch thu c 800ml dung dch HCl 1M v sau phn ng kt thỳc cụ cn dung dch s thu c bao nhiờu gam cht rn khan : A 47,75 gam B 74,7 gam C 35 gam D 56,525 gam Dng 4: Este ca amino axit v mui ca aminoaxit vi axit (vụ c, hu c) hoc vi (NH3 ,amin) Cụng thc CnH2n+1NO2 cú cỏc ng phõn sau: - Amino axit , este aminoaxit , mui to t axit hu c khụng no vi NH3 hoc amin no v ngc li; hp cht nitro - NO2 Vớ d: C3H7NO2 cú cỏc p sau: CH2 = CHCOONH4 ; H2NCOOCH2CH3 ; H2N CH2 COOCH3; H2NCH(CH3 )COOH; H2NC2H4COOH; HCOONH3CH = CH2 ; CH3-CH2- CH2 -NO2 ; CH3-CH(CH3)-NO2 Cõu 1: (K) l hp cht hu c cú CTPT l: C5H11NO2 un (K) vi dd NaOH thu c hp cht cú CTPT l C2H4 O2NNa v hp cht hu c (L) Cho hi (L) qua CuO/to thu c mt cht hu c (M) cú kh nng tham gia phn ng bc CTCT ca (K) l A CH2=CH-COONH3-C2H5 B NH2-CH2-COO-CH2-CH2-CH3 C NH2-CH2-COO-CH(CH3)2 D H2N-CH2-CH2-COO-C2H5 Cõu 2: Cho 8,9 g mt hp cht hu c X cú CTPT C3H7 O2N phn ng vi 100 ml dd NaOH 1,5M Sau phn ng x y hon ton, cụ cn dd thu c 11,7 g cht rn CTCT thu gn ca X l A H2NCH2CH2COOH B H2NCH2 COOCH3 C CH2=CHCOONH4 D HCOOH3NCH=CH2 Cõu 3: t chỏy hon ton mt lng cht hu c X thu c 3,36 lớt khớ CO2, 0,56 lớt khớ N2 (cỏc khớ o ktc) v 3,15 g H2O Khi X tỏc dng vi dd NaOH thu c sn phm cú mui H2N-CH2COONa CTCT thu gn ca X l A H2N-CH2-COO-C3H7 B H2N-CH2 -COO-C2H5 C H2N-CH2-CH2-COOH D H2N-CH2-COO-CH3 Cõu 4: Cho hn hp X gm cht hu c cú cựng cụng thc phõn t C3H10N2O2 tỏc dng va vi dung dch NaOH v un núng thu c dung dch Y v 4,48 lớt hn hp Z ( ktc) gm hai khớ (u lm xanh giy qu m) hn kộm mt nguyờn t C T hi ca Z i vi H2 bng 13,75 Cụ cn dung dch Y thu c lng mui khan l: A 16,5 gam B 20,1 gam C 8,9 gam D 15,7 gam Cõu 5: a) Hp cht X cú CTPT trựng vi cụng thc n gin nht, va tỏc dng c vi axit va tỏc dng c vi kim iu kin thớch hp Trong phõn t X, thnh phn phn trm lng ca cỏc nguyờn t C, H, N ln lt bng 40,449%; 7,865% v 15,73%, cũn li l oxi Khi cho 4,45 gam X phn ng hon ton vi mt lng va dd NaOH (un núng) thu c 4,85 mui khan CTCT thu gn ca X l: A CH2 = CHCOONH4 B H2NCOOCH2CH3 C H2NCH2COOCH3 D H2NC2H4COOH b) Khi cho 10,6 gam X cú cụng thc phõn t C3 H10N2O2 phn ng vi mt lng va dd NaOH (un núng) thu c 8,3 -7- gam mui khan v khớ Y bc lm xanh qu m CTCT thu gn ca X l: A NH2COONH2(CH3)2 B NH2CH2CH2COONH4 C NH2COONH3CH2CH3 D NH2CH2COONH3CH3 Cõu 6: a) Este A c iu ch t amino axit B v ancol met ylic t chỏy hon ton 0,1 mol A thu c 1,12 lớt N2 (ktc), 13,2 gam CO2 v 6,3 gam H2O Bit t ca A so vi H2 l 44,5 CTCT ca A l: A H2N CH2 COOH B H2N CH2 CH2 COOCH3 C CH3 CH(NH2) COOCH3 D CH2 CH = C(NH2) COOCH3 b) Este A c iu ch t amino axit B v ancol metylic t chỏy hon ton 8,9 gam A thu c 1,12 lớt N2 (ktc), 13,2 gam CO2 v 6,3 gam H2O Bit t ca A so vi H2 l 44,5 CTCT ca A l: A H2NCH2COOH B H2NCH2CH2COOCH3 C CH3CH(NH2) COOCH3 D CH2CH = C(NH2)COOCH3 Cõu 7: Mt HCHC X cú t l lng C: H: O: N = 9: 1,75: 8: 3,5 tỏc dng vi dd NaOH v dd HCl theo t l mol 1: v mi trng hp ch to mt mui nht Mt ng phõn Y ca X cng tỏc dng vi dd NaOH v dd HCl theo t l mol 1: nhng ng phõn ny cú kh nng lm mt mu dd Br2 Cụng thc phõn t ca X v cụng thc cu to ca X, Y ln lt l: A C3H7O2N; H2N-C2H4-COOH; H2 N-CH2-COO-CH3 B C3H7O2N; H2N-C2H4-COOH; CH2=CH-COONH4 C C2H5O2N; H2N-CH2 -COOH; CH3-CH2-NO2 D C3H5O2N; H2N-C2H2-COOH; CH2=CH-COONH4 Cõu 8: (X) l HCHC cú thnh phn v lng phõn t l 52,18%C, 9,40%H, 27,35%O, cũn li l N Khi un núng vi dd NaOH thu c mt hn hp cht cú cụng thc phõn t C2H4O2NNa v cht hu c Y, cho hi Y qua CuO/to thu c cht hu c Z cú kh nng tham gia phn ng gng Cụng thc cu to ca X l: A CH3(CH2)4NO2 B NH2-CH2COO-CH2 -CH2-CH3 C NH-CH2-COO=CH(CH2)3 D H2N-CH2-CH2-COOC2H5 Cõu 9: Thc hin phn ng este gia amino axit X v ancol CH3OH thu c este Y cú t hi so vi khụng khớ bng 3,069 CTCT ca X: A H2N-CH2-COOH B H2N-CH2-CH2-COOH C CH2 -CH(NH2)-COOH D H2N-(CH2)3-COOH Cõu 10: Cht X cú cụng thc phõn t C4H10O2NCl un núng X vi dung dch NaOH thu c cỏc sn phm NaCl, H2N- CH2COONa, v ru Y Cụng thc cu to ca X l: A CH3-CH2-COO-CH2-NH3Cl B CH3-CH2-OOC-CH2-NH3Cl C CH3 -COO-CH2-CH2-NH3Cl D CH3 CH- COO-CH2-Cl NH2 Cõu 11: Cỏc cht X, Y, Z cú cựng CTPT C2H5O2 N X tỏc dng c c vi HCl v Na2O Y tỏc dng c vi H mi sinh to Y1 Y1 tỏc dng vi H2SO4 to mui Y2 Y2 tỏc dng vi NaOH t ỏ i t o li Y1 Z tỏc dng vi NaOH to mt mui v khớ NH3 CTCT ỳng ca X, Y, Z l: A X (HCOOCH2NH2), Y (CH3COONH4), Z (CH2NH2COOH) B X (CH3COONH4), Y (HCOOCH2NH2), Z (CH2 NH2COOH) C X (CH3COONH4), Y (CH2NH2COOH), Z (HCOOCH2NH2) D X (CH2 NH2COOH), Y (CH3CH2NO2), Z (CH3 COONH4) Cõu 12: Cho 12,55 gam mui CH3CH(NH3Cl)COOH tỏc dng vi 150 ml dung dch Ba(OH)2 1M Cụ cn dung dch sau phn ng thu c m gam cht rn Giỏ t r ca m l : A 15,65 g B 26,05 g C 34,6 g D Kt qu khỏc Cõu 13: A l mt hp cht hu c cú CTPT C5H11O2N un A vi dung dch NaOH thu c mt hp cht cú CTPT C2H4O2NNa v cht hu c B Cho hi qua CuO/to thu c cht hu c D cú kh nng cho phn ng gng CTCT ca A l : A CH2= CH - COONH3-C2H5 B CH3(CH2)4NO2 C H2N-CH2-CH2-COOC2H5 D NH2-CH2COO-CH2-CH2- CH3 Cõu 14: Cht hu c A cú mt nhúm amino, chc este Hm lng oxi A l 31,07% X phũng húa m gam cht A c ancol, cho hi ancol i qua CuO d, to thu andehit B Cho B phn ng vi dd AgNO3/NH3 thu c 16,2 gam Ag v mt mui hu c Giỏ tr ca m l A 3,3375 gam B 7,725 gam C 6,675 gam D 3,8625 gam Cõu 15: Cht hu c M cú mt nhúm amino, mt chc este Hm lng oxi M l 35,96% X phũng húa a gam cht M c ancol Cho ton b hi ancol i qua CuO d, to thu andehit Z Cho Z phn ng vi dung dch AgNO3/NH3 d, thu c 16,2 gam Ag Giỏ tr ca a l: (hiu sut phn ng 100%) A 7,725 gam B 3,3375 gam C 3,8625 gam D 6,675 gam Cõu 16: Hai ng phõn X, Y ú cú cht lng v cht rn cú thnh phn 40,45%C, 7,86%H, 15,73%N cũn li l oxi Khi cho cht lng bay hi thu c cht hi cú t so vi khụng khớ l 3,069 Khi phn ng vi NaOH, X cho mui C3H6 O2NNa, Y cho mui C2H4O2NNa Cụng thc cu to v trng thỏi ca X, Y l A X l cht lng CH3-CH(NH2)-COOH, Y l cht rn NH2 -CH2COOCH3 B X l cht rn CH2(NH2)-CH2COOH, Y l cht lng NH2-CH2OOCCH3 C X l cht lng CH2(NH2)-CH2COOH, Y l cht rn NH2-CH2OOCCH3 D X l cht rn CH3-CH(NH2)-COOH, Y l cht lng NH2-CH2COOCH3 -8- Cõu 17: X l este to bi -amino axit Y (cha nhúm -COOH v nhúm -NH2) vi ru n chc Z Thy phõn hon ton 0,1 mol X 200 ml dung dch NaOH 1M, cụ cn dung dch thu c 13,7 gam cht rn v 4,6 gam ru Z Vy cụng thc ca X l: A CH3-CH(NH2)-COOC2H5 B CH3-CH(NH2)-COOCH3 C H2N-CH2-COOC2H5 D H2N-CH2-COOCH2-CH=CH2 Cõu 18: Mt hp cht X (cú lng phõn t bng 103) Cho 51,50 gam X phn ng ht vi 500 ml dung dch NaOH 1,20M, thu c dung dch Y ú cú mui ca aminaxit, ancol cú lng phõn t ln hn lng phõn t O2 Cụ cn Y thu m gam cht rn Giỏ tr m l A 52,50 B 26,25 C 48,50 D 24,25 Cõu 19: Este X cú lng phõn t bng 103 vC c iu ch t mt ancol n chc (cú t hi so vi oxi ln hn 1) v mt amino axit un 25,75 gam X vi 300 ml dung dch NaOH 1M, sau phn ng hon ton thu c dung dch Y Cụ cn Y thu c m gam cht rn Giỏ tr m l A 27,75 gam B 26,25 gam C 29,75 gam D 24,25 gam Cõu 20 a) A l este ca axit glutamic , khụng tỏc dng vi Na Thy phõn hũan ton mt lng cht A 100ml dung dch NaOH 1M ri cụ cn , thu c mt ru B v cht rn khan C un núng lng ru B trờn vi H2SO4 c 170oC thu c 0,672 lớt ụlờfin (kc) vi hiu sut phn ng l 75% Cho ton b cht rn C tỏc dng vi dung dch HCl d ri cụ cn, thu c cht rn khan D Khi lng cht rn D l : A 10,85gam B 7,34 gam C 9,52 gam D 5,88gam b) Este X c iu ch t aminoaxit glutamic v ancol etylic Cho 0,1 mol X vo 200 ml dung dch NaOH 1,5M, sau phn ng xy hon ton, cụ cn cn thn dung dch thu c cht rn G Cho ton b cht rn G vo dung dch HCl d, sau ú cụ cn cn thn li thu c m gam cht rn E Giỏ tr ca m l: A 26,4 g B 18,35 g C 30,05 g D 35,9 g Cõu 21: Cht X cú cụng thc phõn t C4H9 O2N Bit: X + NaOH Y + CH4O Y + HCl (d) Z + NaCl Cụng thc cu to ca X v Z ln lt l A H2NCH2CH2COOCH3 v CH3CH(NH3Cl)COOH B CH3CH(NH2)COOCH3 v CH3CH(NH2)COOH C CH3CH(NH2)COOCH3 v CH3CH(NH3Cl)COOH D H2NCH2COOC2H5 v ClH3NCH2COOH Cõu 22: Cht hu c X cú nhúm amino, chc este Hm lng N cú X l 15,73% X phũng hoỏ m gam X thu c hi ancol Z, cho Zqua CuO d thu c andehit Y ( phn ng hon ton), cho Y phn ng hon ton AgNO3/NH3d thu c 16,2 gam Ag giỏ tr m l A.7,725 B 6,675 C 3,3375 D.5,625 Cõu 23: X l este to bi -amino axit Y (cha nhúm -COOH v nhúm -NH2) vi ancol n chc Z Thy phõn hon ton 0,1 mol X 200 ml dung dch NaOH 1M, cụ cn dung dch thu c 13,7 gam cht rn v 4,6 gam ancol Z Vy cụng thc ca X l: A CH3-CH(NH2)-COOC2H5 B CH3-CH(NH2)-COOCH3 C H2N-CH2-COOC2H5 D H2N-CH2-COOCH2-CH=CH2 Cõu 24: Cht X cú cụng thc phõn t C8H15O4N T X, thc hin bin húa sau: C 8H15O4N+NaOH NaOOC(CH)2CH(NH2 )COONa + CH4 O + C2H6O Hóy cho bit, X cú th cú bao nhiờu cụng thc cu to? A B C D Cõu 25: Cht hu c X mch h cú dng H2N-R-COOR(R, R' l cỏc gc hirocacbon), phn trm lng nit X l 15,73% Cho m gam X phn ng hon ton vi dung dch NaOH, ton b lng ancol sinh cho tỏc dng ht vi CuO (un núng) c anehit Y (ancol ch b oxi húa thnh anehit) Cho ton b Y tỏc dng vi mt lng d dung dch AgNO3 NH3, thu c 12,96 gam Ag kt ta Giỏ tr ca m l: A 2,67 B 4,45 C 5,34 D 3,56 Dng 5: t chỏy aminoaxit Cõu 4: t chỏy hon ton 17,8 gam hp cht amino axit X c ly t thiờn nhiờn ngi ta thu c 13,44 lớt khớ CO2, 12,6 gam nc v 1,12 lớt N2 Mt khỏc, cho 0,1 mol X phn ng ht vi hn hp NaNO2 v HCl, ngi ta c 2,24 lớt khớ N2 Cỏc cht khớ u o iu kin tiờu chun Cụng thc cu to ca X l: A H2NCH(C2H5)COOH B H2NCH2COOH C H2NCH(CH3)COOH D H2NCH2CH2COOH Cõu 5: t chỏy hon ton 45,1 gam hn hp X gm CH3CH(NH2)COOH v CH3COONH3CH3 thu c CO2, H2O v N2 cú tng lng l 109,9 gam Phn trm lng mi cht hn hp X ln lt l : A.39,47% v 60,53% B 35,52% v 64,48% C 59,20% v 40,80% D 49,33% v 50,67% Cõu 6: t chỏy hon ton 0,25 mol hn hp X gm aminoaxit H2NR(COOH)x v mt axit no, m c h h, n chc thu c 0,6 mol CO2 v 0,675 mol nc Mt khỏc 0,2 mol X phn ng va vi dung dch cha a mol HCl Giỏ tr ca a l : A 0,2 mol B 0,25 mol C 0,12 mol D 0,1 mol Cõu 7: Aminoaxit X (ch cha amin bc 1) cú cụng thc CxHyO2N t chỏy hon ton 0,1 mol X ri cho ton b sn phm -9- chỏy hp th vo bỡnh ng dung dch NaOH c thy lng bỡnh tng thờm 25,7 g S cụng thc cu to ca X l: A B C D Cõu 8: Hn hp X gm amino axit no bc Y v Z Y cha nhúm axit, mt nhúm amino; Z cha mt nhúm axit, mt nhúm amino MY/MZ = 1,96 t chỏy 1mol Y hoc mol Z thớ s mol CO2 thu c nh hn Cụng thc cu to ca hai amino axit l: A H2NCH2CH(COOH)CH2COOH v H2 NCH2COOH B H2NCH2CH(COOH)CH2COOH v H2N[CH2]2COOH C H2NCH(COOH)CH2COOH v H2NCH2COOH D H2NCH(COOH)CH2COOH v H2N[CH2]2COOH Cõu 9: Mt amino axit (X) cú cụng thc tng quỏt NH2RCOOH t chỏy hon ton a mol X thu c 6,729(l) CO2 (ktc) v 6,75 g H2O CTCT ca X l : A CH2NH2COOH B CH2NH2CH2COOH C CH3CH(NH2)COOH D C B v C Cõu 10: Xỏc n h th tớch O2 (ktc) cn t chỏy ht 22,455g hn hp X gm (CH3 CH(NH2)COOH v CH3COOCNH3CH3) Bit sn phm chỏy c hp th h t vo bỡnh ng dung dch NaOH thỡ lng bỡnh tng 85,655 g A 44,24 (l) B 42,8275 (l) C 128,4825 (l) D Kt qu khỏc Cõu 11: t chỏy hon ton 45,1 gam hn hp X gm CH3CH(NH2)COOH v CH3COONH3CH3 thu c CO2, H2O v N2 cú tng lng l 109,9 gam Phn trm lng mi cht hn hp X ln lt l A 39,47% v 60,53% B 35,52% v 64,48% C 59,20% v 40,80% D 49,33% v 50,67% Cõu 12: Amino axit (Y) cú cụng thc dng NCxHy(COOH)m Ly mt lng axit aminoaxetic (X) v 3,82g (Y) Hai cht (X) v (Y) cú cựng s mol t chỏy hon ton lng (X) v (Y) trờn, th tớch khớ oxi cn dựng t chỏy ht (Y) nhiu hn t chỏy ht (X) l 1,344 lớt (ktc) CTCT thu gn ca (Y) l A CH3NHCH2COOH B H2NCH2CH2COOH C N(CH2COOH)3 D NC4H8 (COOH)2 Cõu 13: Ly m gam hn hp X gm hai amino axit cú nhúm -NH2 v nhúm -COOH phn ng vi 55 ml dung dch HCl 2M thu c dung dch Y tỏc dng ht vi cỏc cht dung dch Y cn dựng 70 ml dung dch KOH 3M Mt t chỏy hon ton m(g) X v cho sn phm chỏy qua dd KOH d thỡ lng bỡnh ny tng thờm 14,85 gam Bit t l phõn t gia hai amino axit l 1,187 Cụng thc phõn t ca X : A C2H5 NO2 v C3H7NO2 B C2H5NO2 v C4H9NO2 C C2 H5NO2 v C5H11NO2 D C3H7NO2 v C4H9NO2 Cõu 14: Khi thy phõn mt protein (X) thu c hn hp gm aminoaxit no k tip dóy ng ng Bit mi cht u cha mt nhúm NH2 v mt nhúm COOH t chỏy hon ton 0,2 mol hn hp aminoaxit ri cho sn phm chỏy qua bỡnh ng dung dch NaOH d, thy lng bỡnh tng 32,8 gam Cụng thc cu to ca aminoaxit l A H2NCH(CH3)COOH, C2H5CH(NH2)COOH B H2NCH2COOH, H2NCH(CH3)COOH C H2NCH(CH3)COOH, H2N(CH2)3COOH D H2NCH2COOH, H2 NCH2CH2COOH Dng 6: Peptit v protein S peptit ng phõn c to thnh t n n v amino axit khỏc l n! (cựng CTPT) C n v amino axit thỡ tỏch phõn t H2O Vy c n n v amino axit thỡ tỏch (n - 1) phõn t H2 O Mt phõn t ipepit s cng phõn t H2O Vy c 1peptit cú n n v amino axit s cng (n-1) phõn t H2O Mt phõn t dipepit s cng phõn t NaOH to phõn t H2O Vy c 1peptit cú n n v amino axit s cng n phõn t NaOH to phõn t H2O Mt phõn t dipepit s cng phõn t HCl v phõn t H2O to sn phm mui Vy c 1peptit cú n n v amino axit s cng n phõn t HCl v (n-1) phõn t H2O to sn phm mui Cõu 1: Khi thy phõn 500 g protein A thu c 170 g alanin Nu phõn t ca A l 50000 vC thỡ s mt xớch alanin phõn t ca A l A 190 B 191 C 192 D 193 Cõu 2: Cụng thc no sau õy ca tripeptit (A) tha iu kin sau: + Thy phõn hon ton mol A thỡ thu c cỏc - amino axit l: mol Glyxin , mol Alanin, mol Valin + Thy phõn khụng hon ton A, ngoi thu c cỏc amino axit thỡ cũn thu c ipeptit: Ala-Gly; Gly- Ala v Gly-GlyVal A Ala-Gly-Gly-Gly-Val B Gly-Gly-Ala-Gl y-Val C Gly-Ala-Gly-Gly-Val D Gly-Ala-Gly-Val-Gly Cõu 3: Thu phõn khụng hon ton tetra peptit (X), ngoi cỏc - amino axit cũn thu c cỏc ipetit: Gly-Ala; Phe-Va; AlaPhe Cu to no sau õy l ỳng ca X A Val-Phe-Gly-Ala B Ala-Val-Phe-Gly C Gly-Ala-Val-Phe D Gly-Ala-PheVal Cõu 4: Khi thy phõn hon ton polipeptit ta thu c cỏc aminoaxit X,Y,Z,E,F Cũn thy phõn mt phn thỡ thu c cỏc i v tripeptit XE, ZY, EZ, YF , EZY Hóy la chn th t ỳng ca cỏc aminoaxit to thnh polipeptit cho trờn A X-Z-Y-E-F; B X-E-Y-Z-F C X-E-Z-Y-F D X-Z-Y-E-F Cõu 5: Thu phõn hon ton mol pentapeptit X, thu c mol gl yxin (Gly), mol alanin (Ala), mol valin (Val) v - 10 - mol Phenylalanin (Phe) Thu phõn khụng hon ton X thu c ipeptit Val-Phe v tripeptit Gly-Ala-Val nhng khụng thu c ipeptit Gly-Gly Cht X cú cụng thc l A Gly-Phe-Gly-Ala-Val B Gly-Ala-Val-Val-Phe C Gli-Ala-Val-Phe-Gly D Val-Phe-Gly-Ala-Gly Cõu 6: ipeptit mch h X v tripeptit mch h Y u c to nờn t mt aminoaxit (no, mch h, phõn t cha mt nhúm NH2 v mt nhúm COOH) t chỏy hon ton 0,1 mol Y, thu c tng lng CO2 v H2O bng 54,9 gam t chỏy hon ton 0,2 mol X, sn phm thu c cho li t t qua nc vụi d, to m gam kt ta Giỏ tr ca m l A 120 B 60 C 30 D 45 Cõu 7: Ly 14,6g mt ipeptit to t glixin v alanin cho tỏc dng va vi dung dch HCl 1M Th tớch dung dch HCl tham gia phn ng: A 0,1 lit B 0,2 lớt C 0,3 lớt D 0,4 lớt Cõu 8: Thu phõn 1250 gam protein X thu c 425 gam alanin Nu phõn t ca X bng 100.000 vC thỡ s mt xớch alanin cú phõn t X l A 328 B 453 C 479 D 382 Cõu 9: Khi thy phõn hon ton 0,1 mol tripeptit mch h X thu c alanin t chỏy hon ton lng alanin ny ly sn phm thu c cho li t t qua nc vụi d, to m gam kt ta Giỏ tr ca m l: A 120 B 90 C 30 D 45 Cõu 10: Khi thy phõn m (gam) protein A thu c 17,8 g alanin Hóy tớnh m ? Cõu 11: Bradikinin cú tỏc dng lm gim huyt ỏp, ú l mt nonapeptit cú cụng thc l : Arg Pro Pro Gly-Phe-Ser-Pro-Phe-Arg Khi thy phõn khụng hon ton peptit ny cú th thu c bao nhiờu tri peptit m thnh phn cú cha phenyl alanin (Phe) A.3 B C D Cõu 12 a) X v Y ln lt l cỏc tripeptit v tetrapeptit c to thnh t cựng mt amino axit no mch h, cú mt nhúm -COOH v mt nhúm -NH2 t chỏy hon ton 0,1 mol Y thu c sn phm gm CO2, H2O, N2, ú tng lng ca CO2 v H2O l 47,8 gam Nu t chỏy hon ton 0,3 mol X cn bao nhiờu mol O2? A 2,8 mol B 2,025 mol C 3,375 mol D 1,875 mol b)Tripeptit mch h X v tetrapeptit mch h Y u c to t mt amino axit no, mch h cú nhúm COOH v nhúm NH2 t chỏy hon ton 0,1 mol X thu c sn phm gm CO2, H2O, N2 ú tng lng CO2 , H2O l 36,3 gam Nu t chỏy hon ton 0,2 mol Y cn s mol O2 l: A 1,875 B 1,8 C 2,8 D 3,375 Cõu 13: Cho mt ipeptit Y cú cụng thc phõn t C6 H12N2O3 S ng phõn peptit ca Y (ch cha gc -amino axit) mch h l A B C D Cõu 14: a) X l tetrapeptit Ala-Gl y-Val-Ala, Y l tripeptit Val-Gly-Val un núng m (gam) hn hp cha X v Y cú t l s mol ca X v Y tng ng l 1:3 vi dung dch NaOH va Phn ng hon ton thu c dung dch T Cụ cn cn thn dung dch T thu c 23,745 gam cht rn khan Giỏ tr ca m l A 19,455 B 68,1 C 17,025 D 78,4 b) X l tetrapeptit cú cụng thc Gly Ala Val Gly Y l tripeptit cú cụng thc Gly Val Ala un m gam hn hp A gm X, Y cú t l mol tng ng l 4:3 vi dung dch KOH va sau phn ng xy hon ton cụ cn dung dch thu c 257,36g cht rn khan Giỏ tr ca m l: A 150,88 gam B 155,44 gam C 167,38 gam D 212,12 gam c) X l tetrapeptit Ala-Gly-Val-Ala, Y l tripeptit Val-Gly-Val un núng m gam hn hp X v Y cú t l s mol nX : nY = : vi 780 ml dung dch NaOH 1M (va ), sau phn ng kt thỳc thu c dung dch Z Cụ cn dung dch thu c 94,98 gam mui m cú giỏ tr l : A 68,1 gam B 64,86 gam C 77,04 gam D 65,13 gam Cõu 15: Tờn gi cho peptit 2 H N-CH-CO-NH-CH -CO-NH-CH-COOH CH3 CH3 A Ala-Gli-Ala B Gli-Ala-Gli C Gli-Ala-Val D Ala-Ala-Gli Cõu 16: X l mt tetrapeptit cu to t mt amino axit (A) no, mch h cú nhúm COOH; nhúm NH2 Trong A %N = 15,73% (v lng) Thy phõn m gam X mụi trng axit thu c 41,58 gam tripeptit; 25,6 gam ipeptit v 92,56 gam A Giỏ tr ca m l: A 149 gam B 161 gam C 143,45 gam D 159 gam Cõu 17: Thy phõn hon ton mol pentapeptit A thỡ thu c mol glyxin, mol alanin v mol valin Khi thy phõn khụng hon ton A thỡ hn hp sn phm thy cú cỏc ipeptit Ala-Gly, Gly-Ala v tripeptit Gly-Gly-Val Vy trt t cu to cỏc amino axit pentapeptit A l: A Val-Gly-Gly-Gly-Ala B Gly-Ala-Gly-Gly-Val C Ala-Gly-Val-Gly-Gly D Gly-Gly-Val-Gly-Ala Cõu 18 a) Thu phõn hon ton 150 gam hn hp cỏc ipeptit thu c 159 gam cỏc aminoaxit Bit rng cỏc ipeptit c to bi cỏc aminoaxit ch cha mt nguyờn t N phõn t Nu ly 1/10 lng aminoaxit thu c tỏc dng vi HCl d thỡ lng mui thu c l: A 19,55 gam B 20,375 gam C 23,2 gam D 20,735 gam b) Thy phõn hon ton 60 gam hn hp hai ipetit thu c 63,6 gam hn hp X gm cỏc amino axit (cỏc amino axit ch cú mt nhúm amino v mt nhúm cacboxyl phõn t) Nu cho 1/10 hn hp X tỏc dng vi dung dch HCl (d), cụ cn cn thn dung dch, thỡ lng mui khan thu c l : - 11 - A 7,09 gam B 16,30 gam C 8,15 gam D 7,82 gam Cõu 19: X l mt tripeptit c to thnh t aminoaxit no, mch h cú nhúm -COOH v nhúm -NH2 t chỏy hon ton 0,3 mol X cn 2,025 mol O2 thu c sn phm gm CO2, H2O, N2 Vy cụng thc ca amino axit to nờn X l A H2NC2H4COOH B H2NC3H6COOH C H2N-COOH D H2NCH2COOH Cõu 20: X l tetrapeptit (mch h) c to bi amino axit Y no, mch h, cú mt nhúm -COOH v mt nhúm -NH2 t chỏy hon ton 0,1 mol X thu c sn phm gm CO2, H2O, N2, ú tng lng ca CO2 v H2O l 97,4 gam S CTCT tho Y l: A B C D Cõu 21: Vi xỳc tỏc men thớch hp cht h c G b thu phõn hon ton cho hai aminoaxit thiờn nhiờn X v Y vi t l s mol ca cỏc cht phn ng nh sau: mol G + mol H2O mol X + mol Y Thu phõn hon ton 20,3 gam G thu c m1 gam X v m2 gam Y t chỏy hon ton m2 gam Y cn 8,4 lớt O2 kc thu c 13,2 gam CO2, 6,3 gam H2O v 1,23 lớt N2 27oC, atm Y cú cụng thc phõn t trựng vi cụng thc n gin nht X, Y v giỏ tr m1, m2 l A NH2-CH2-COOH (15gam), CH2(NH2)-CH2-COOH; (8,95 gam) B NH2-CH2-CH2-COOH (15gam), CH3-CH(NH2)-COOH; (8,9 gam) C NH2-CH2-COOH (15gam), CH3-CH(NH2)-COOH, (8,9 gam) D NH2-CH2-COOH (15,5gam), CH3-CH(NH2)-COOH; (8,9 gam) Cõu 22: Tripeptit X cú cụng thc sau : H2NCH2 CONHCH(CH3)CONHCH(CH3)COOH Thy phõn hon ton 0,1 mol X 400 ml dung dch NaOH 1M Khi lng cht rn thu c cụ cn dung dch sau phn ng l : A 28,6 gam B 22,2 gam C 35,9 gam D 31,9 gam Cõu 23: Phõn t ca mt pentapeptit bng 373 Bit pentapeptit ny c to nờn t mt amino axit m phõn t ch cú cha mt nhúm amino v mt nhúm cacboxyl Phõn t ca amino axit ny l A 60,6 B 57,0 C 75,0 D 89,0 Cõu 24: X l tetrapeptit cú cụng thc Gly Ala Val Gly Y l tripeptit cú cụng thc Gly Val Ala un m gam hn hp A gm X, Y cú t l mol tng ng l 4:3 vi dung dch KOH va sau phn ng xy hon ton cụ cn dung dch thu c 257,36g cht rn khan Giỏ tr ca m l: A 167,38 gam B 150,88 gam C 212,12 gam D 155,44 gam Cõu 25: Nu thu phõn khụng hon ton pentapeptit Gly-Ala-Gly-Ala-Gly thỡ thu c ti a bao nhiờu ipeptit khỏc nhau? A B C D Cõu 26: ipeptit mch h X v tripeptit mch h Y u c to nờn t mt aminoaxit (no, mch h, phõn t cha mt nhúm NH2 v mt nhúm COOH).t chỏy hon ton 0,1 mol Y, thu c tng lng CO2 v H2O bng 54,9 gam t chỏy hon ton m (g) X, lng CO2 sinh c hp th hon ton vo 600 ml dd hn hp gm NaOH 0,1M v Ba(OH)2 0,2M sinh 11,82g kt ta Tớnh giỏ tr ca m A 1,6 v 6,4 gam B 1,6 C 6,4 D Cõu 27: Trong fibroin lng gc glyxyl chim 50% Khi lng glyxin m cỏc tm cú to nờn 1kg t l A 646,55 B 500 C 386,66 D 556,5 Cõu 28: Khi thu phõn hon ton 0,1 mol peptit A mch h (A to bi cỏc amino axit cú mt nhúm amino v mt nhúm cacboxylic) bng lng dung dch NaOH gp ụi lng cn phn ng, cụ cn dung dch thu c hn hp cht rn tng so vi lng A l 78,2gam S liờn kt peptit A l: A 10 B 20 C D 18 Cõu 29: Cho 0,1 mol mt peptit X ch c to thnh t mt -aminoaxit Y (ch cha nhúm amino v mt nhúm cacboxyl ) tỏc dng vi dung dch HCl va , sau phn ng thu c lng mui tng so vi ban u l 30,9 gam Mt khỏc t chỏy 0,1 mol X ri sc sn phm chỏy vo nc vụi d thu c 180 gam kt ta Tờn gi ca Y l A Glyxin B Alanin C Valin D Lysin Cõu 30: Thu phõn hon ton mol pentapeptit A thỡ thu c mol glyxin; mol alanin v 1mol valin Khi thu phõn khụng hon ton A thỡ hn hp sn phm thy cú cỏc ipeptit Ala-Gly; Gly-Ala v tripeptit Gly-Gly-Val Amino axit u N, amino axit u C pentapeptit A ln lt l A Gly, Val B Ala, Val C Gly, Gly D Ala, Gly Cõu 31: Khi thy phõn khụng hon ton mt peptit A cú lng phõn t 293g/mol v cha 14,3% N (theo lng) thu c peptit B v C Mu 0,472 gam peptit B em un núng, phn ng hon ton vi 18 ml dung dch HCl 0,222 M Mu 0,666 gam peptit C un núng, phn ng hon ton vi 14,7 ml dung dch NaOH 1,6% (khi lng riờng l 1,022 g/ml) Cu to cú th cú ca A l: A Ala-Phe-Gly hoc Gly-Phe-Ala B Phe-Gly-Ala hoc Ala-Gly-Phe C Phe-Ala-Gly hoc Gly-Ala-Phe D Phe-Ala-Gly hoc Ala-Gl y-Phe Cõu 32: Phỏt biu no sau õy ỳng A Phõn t peptit mch h cú s liờn kt peptit bao gi cng nhiu hn s gc -amino axit B Phõn t peptit mch h to bi n gc -amino axit cú cha (n 1) liờn kt peptit C Cỏc peptit u cú phn ng vi Cu(OH)2 to thnh phc cht cú mu tớm c trng D Phõn t tripeptit cú ba liờn kt peptit Cõu 33: Cho 15 gam glyxin tỏc dng va vi 8,9 gam alanin thu c m gam hn hp tripeptit mch h Giỏ tr ca m l A 22,10 gam B 23,9 gam C 20,3 gam D 18,5 gam Cõu 34: X v Y ln lt l cỏc tripeptit v hexapeptit c to thnh t cựng mt amino axit no mch h, cú mt nhúm COOH v mt nhúm -NH2 t chỏy hon ton 0,1 mol X bng O2 va thu c sn phm gm CO2, H2O, N2, cú tng lng l 40,5 gam Nu cho 0,15 mol Y cho tỏc dng hon ton vi NaOH (ly d 20% so vi lng cn thit), sau phn ng - 12 - cụ cn dung dch thỡ thu c bao nhiờu gam cht rn? A 87,3 gam B 9,99 gam C 107,1 gam D 94,5 gam Cõu 35: Ly 8,76 g mt ipeptit to t glyxin v alanin cho tỏc dng va vi dung dch HCl 1M Th tớch dung dch HCl tham gia phn ng l: A 0,1 lớt B 0,06 lớt C 0,24 lớt D 0,12 lớt Cõu 49: Trong hp cht sau õy cú my liờn kt peptit? H2N-CH2-CO-NH-CH-CO-NH-CH-CO-NH-CH2-CH2-CO-HN-CH2 -COOH CH3 C H5 A B C D Cõu 50: Thy phõn hon ton mol oligopeptit X mch h thu c mol Gly, mol Ala, mol Val, mol Tyr Mt khỏc, nu thy phõn khụng hon ton thi thu c sn phn cú cha Gly-Val, Val-Gly S cụng thc cu to phự hp ca X l A B C D Cõu 51: Mt peptit X thu phõn hon ton ch thu c alanin Bit phn trm lng N X bng 18,767% Khi lng mui thu c cho 0,5 mol X tỏc dng vi dung dch KOH d l A 317,5 gam B 315,7 gam C 371,5 gam D 375,1 gam Cõu 52: Hn hp M gm mt peptit X v mt peptit Y (chỳng cu to t loi aminoaxit, tng s liờn kt CONH phõn t l 5) vi t l s mol nX : nY = 1:3 Khi thy phõn hon ton m gam M thu c 81gam glixin v 42,72 gam alanin m cú giỏ tr l A 104,28 gam B 109,5 gam C 116,28 gam D 110,28 gam Cõu 53: Thu phõn hon ton mol pentapeptit A thỡ thu c mol glyxin; mol alanin v 1mol valin Khi thu phõn khụng hon ton A thỡ hn hp sn phm thy cú cỏc ipeptit Ala-Gly; Gly-Ala v tripeptit Gly-Gly-Val Amino axit u N, amino axit u C pentapeptit A ln lt l: A Gly, Gly B Ala, Val C Ala, Gly D Gly, Val Cõu 54: Thc hin tng hp tetra peptit t 5,0 mol glixin 4,0 mol alanin v 7,0 mol axit -2-aminobutanoic Bit phn ng xy hon ton, lng tetrapeptit thu c l A 1236 gam B 1164 gam C 1452 gam D 1308 gam Cõu 55: Khi thy phõn mt octanpetit X cú cụng thc cu to l Gly-Phe-Tyr-Lys-Gly-Phe-Tyr thỡ thu c bao nhiờu tripeptit cú cha Gly? A B C D Cõu 56: X l mt tetrapeptit Cho m gam X tỏc dng va vi 0,3 mol NaOH thu c 34,95g mui Phõn t ca X cú giỏ tr l: A 324 B 432 C 234 D 342 Cõu 57: Tripeptit M v tetrapeptit Q u c to t mt amino axit X mch h, phõn t cú mt nhúm -NH2 Phn trm lng ca N X l 18,667% Thu phõn khụng hon ton m gam hn hp M, Q (t l mol 1: 1) mụi trng axit thu c 0,945 gam M; 4,62 gam ipeptit v 3,75 gam X Giỏ tr ca m l A 8,389 B 58,725 C 5,580 D 9,315 Cõu 58: Thy phõn ht m gam tetrapeptit Ala-Ala-Ala-Ala (mch h) thu c hn hp gm 28,48 gam Ala, 32 gam Ala-Ala v 27,72 gam Ala-Ala-Ala Giỏ tr ca m l A 90,6 B 111,74 C 81,54 D 66,44 Cõu 59: Khi thy phõn khụng hon ton pentapeptit Ala-Gly-Val-Gly-Ala c ti a bao nhiờu tripeptit khỏc nhau? A B C D Cõu 60: Thy phõn 25,6 gam polipeptit X thu c 15 gam glyxin v 17,8 gam alanin Cụng thc cu to ca mt xớch c bn phõn t X l : A [-NHCH2CO-NHCH(CH3)-CO-] B [-NHCH2CO-NHCH(CH3)-CO-NHCH2CO-] C [-NHCH2CO-NHCH(CH3)-CO-NHCH(CH3)CO-] D [-NHCH2CO-NHCH(CH3)-CO-NHCH(CH3)CO-NHCH2CO-] Cõu 61: X l tetrapeptit AlaGlyValAla, Y l tripeptit ValGlyVal un núng m gam hn hp X v Y cú t l s mol nX : nY = 1:3 vi 1560 ml dung dch NaOH 1M (dựng d gp ln lng cn thit), sau phn ng kt thỳc thu c dung dch Z Cụ cn dung dch thu c 126,18 gam cht rn khan m cú giỏ tr l : A 68,1 gam B 75,6 gam C 66,7 gam D 78,4 gam Cõu 62: Cho cỏc cõu sau: (1) Peptit l hp cht c hỡnh thnh t n 50 gc amino axit (2) Tt c cỏc peptit u phn ng mu biure (3) T - amino axit ch cú th to tripeptit khỏc (4) Khi un núng nung dch peptit vi dung dch kim, sn phm s cú phn ng mu biure S nhn xột ỳng l: A B C D Cõu 63: Cho cỏc phỏt biu sau: (1) Phõn t ipeptit cú hai liờn kt peptit (2) Phõn t tripeptit cú liờn kt peptit (3) S lkt peptit pt peptit mch h cú n gc - amino axit l n-1 (4) Cú -amino axit khỏc nhau, cú th to peptit khỏc cú y cỏc gc -amino axit ú S nhn nh ỳng l: A B C.3 D.4 - 13 - Cõu 64: Thc hin phn ng trựng ngng hn hp gm glixin v alanin S ipeptit c to r glixin v alanin l: A B C D Cõu 65: X l mt tetrapeptit cu to t Aminoaxit A, phõn t A cú nhúm -NH2 v nhúm -COOH no, mch h Trong A Oxi chim 42,67% lng Thy phõn m gam X mụi trng acid thỡ thu c 28,35g trpeptit; 79,2g ipeptit v 101,25g A Giỏ tr ca m l? A 184,5 B 258,3 C 405,9 D 202,95 Cõu 66: Thy phõn hon ton 143,45 gam hn hp A gm hai tetrapeptit thu c 159,74 gam hn hp X gm cỏc Aminoaxit(cỏc Aminoaxit ch cha 1nhúm COOH v nhúm NH2) Cho ton b X tỏc dng vi dung dch HCl d, sau ú cụ cn dung dch thỡ nhn c m(gam) mui khan Khi lng nc phn ng v giỏ tr ca m ln lt bng? A 8,145(g) v 203,78(g) B 32,58(g) v 10,15(g) C 16,2(g) v 203,78(g) D 16,29(g) v 203,78(g) Cõu 67: X l mt hexapeptit cu to t mt Aminoaxit H2N-CnH2n -COOH (Y) Trong Y cú tng % lng Oxi v Nito l 61,33% Thy phõn ht m(g) X mụi trng acid thu c 30,3(g) petapeptit, 19,8(g) ieptit v 37,5(g) Y Giỏ tr ca m l : A 69 gam B 84 gam C 100 gam D 78 gam Cõu 68: Thy phõn 14(g) mt Polipeptit X vi hiu sut t 80%,thỡ thu c 14,04g mt - Aminoaxit Y Xỏc nh cụng thc cu to ca Y? A H2N(CH2)2COOH B H2NCH(CH3)COOH C H2NCH2COOH D H2NCH(C2H5)COOH Cõu 69: Xỏc nh phõn t gn ỳng ca mt Polipeptit cha 0,32% S phõn t Gi s phõn t ch cú nguyờn t S? A 20.000(vC) B 10.000(vC) C 15.000(vC) D 45.000(vC Cõu 70: un núng alanin thu c mt s peptit ú cú peptit A cú phn trm lng nit l 18,54% Khi lng phõn t ca A l : A 231 B 160 C 373 D 302 Cõu 71: Khi thy phõn hon ton 55,95 gam mt peptit X ch thu c 66,75 gam alanin X l: A tripeptit B tetrapeptit C pentapeptit D ipeptit Cõu 72: Khi thy phõn hon ton 65 gam mt peptit X thu c 22,25 gam alanin v 56,25 gam glyxin X l : A tripeptit B tetrapeptit C pentapeptit D ipeptit Cõu 73:Thu phõn hon ton 500 gam mt oligopeptit X (cha t n 10 gc -amino axit) thu c 178 gam amino axit Y v 412 gam amino axit Z Bit phõn t ca Y l 89 Phõn t ca Z l : A 103 B 75 C 117 D 147 - 14 - ... 56,525 gam Dng 4: Este ca amino axit v mui ca aminoaxit vi axit (vụ c, hu c) hoc vi (NH3 ,amin) Cụng thc CnH2n+1NO2 cú cỏc ng phõn sau: - Amino axit , este aminoaxit , mui to t axit hu c khụng no vi... gc -amino axit B Liờn kt ca nhúm CO vi nhúm NH gia n v -amino axit c gi l liờn kt peptit C Polipeptit gm cỏc peptit cú t 10 n 50 gc -amino axit D Peptit l nhng hp cht cha t n 50 gc -amino axit. .. dung dch brom Tờn gi ca X l A metyl aminoaxetat B axit -aminopropionic C axit -aminopropionic D amoni acrylat Cõu 20: Dóy ch cha nhng amino axit cú s nhúm amino v s nhúm cacboxyl bng l A Gly,