2.21. Cho 0,15 mol H2NC,H3(COOH)j (axit glutamic) vao 175 ml dung dich HCl 2 M , thu dugc dung dich X . Cho NaOH du vao dung dich X . Sau khi HCl 2 M , thu dugc dung dich X . Cho NaOH du vao dung dich X . Sau khi cac phan ung xay ra hoan toan. so mol NaOH da phan ung la
Ạ 0,50. B. 0,65.
C. 0 , 5 5 . D.0,70.
2.22. Hdn hgp khi X gom dimetylainin va hai hidrocacbon dong dang lien tiép. Dot chay hoan toan 100 ml hdn hgp X bang mot lugng oxi vira dii, tiép. Dot chay hoan toan 100 ml hdn hgp X bang mot lugng oxi vira dii, thu dugc 550 m l hdn hgp Y g6m khi va hdi nudẹ Néu cho Y di qua dung djch axit sunfuric dac (du) thi con lai 250 ml khi (cac the ti'ch khi va hoi do d Cling dieu kifin). Cdng thirc phan tir cua hai hidrocacbon la
Ạ C2H4 va C3H,. B. CH4 va C2H,.
12.23. Phat biéu dung la:
Ạ Enzim amilaza xiic tac cho phan umg thuy phan xenlulozo thanh mantozọ
B. Khi cho dung dich long trdng trixng vao Cu(OH)2 tháy xuát hifn phuc mau xanh dam.
C. Axit nucleic la polieste cua axit photphoric va glucozọ
D. Khi thuy phan den cung cac protein don gian se cho h6n hop cac a-aminoaxit.
12.24. Dipeptit mach h6 X va tripeptit mach hd Y đu dugc tao ntn tit m6t
aminoaxit (no, mach ho, trong phan tir chira m6t nhom - N H j va m6t nhom -COOH). D6't chay hoan toan 0,1 mol Y, thu diroc t6ng kh6'i lirong COj va
HjO bang 54,9 gam. D6't chay hoan toan 0,2 mol X, san phim thu diroc cho
16i tCr ttr qua nudfc voi trong du, tao ra m gam ket tiiạ Gia tri cua m la
Ạ 120. B.60. C. 30. D. 45.
12.25. D6't chay hoan toan 0,1 mol m6t amin no, mach hcf X bang oxi vtra dii,
thu duoc 0,5 mol h6n hop Y g6m khi va hoị Cho 4,6 gam X tac dung vdi dung dich HCl (du), s6' mol HCl phan ling la
Ạ 0,1. B.0,4. C. 0,3. D. 0,2.
12.26. H6n hop X g6m alanin va axit glutamic. Cho m gam X tac dung hoan
toan vdfi dung dich NaOH (du), thu dugc dung dich Y chiia (m+30,8) gam mu6'ị Mat khac, neu cho m gam X tac dung hoan toan vdfi dung dich HCl, thu dugc dung dich Z chiia (m+36,5) gam mu6'ị Gia tri cua m la
Ạ 112,2. B. 165,6. C. 123,8. D. 171,0.
12.27. Cho 2,1 gam h6n hop X gom 2 amin no, don chiJc, kfí tiep nhau trong
day d6ng dang phan ung het vdi dung dich HCl (du), thu dugc 3,925 gam h6n hgp muoị C6ng thiic ciia 2 amin trong h6n hgp X 1^
A Q H s N H ^ va CH^NH^. B. CH. N H j va (CH,),N. C. C.HyNH^ va C4H,NH2. D. CH.NH^ va C^H^NH^.
12.28. Dung dich nao sau day lam quy tim chuydn mau xanh?
Ạ Phenylamoni cloruạ B. Etylamin. C. Anilin. D. Glyxin. 13.CACB0HIDRAT
13.1. Cho so do chuyfin hoa : Glucozo -> X -> Y ^ CH3COOH . Hai chat X, Y l^n lugt la Y l^n lugt la
Ạ CH3CH2OH va C H j ^ C H j .
B. CH3CHO va C H 3 C H 2 O H .
C. C H 3 C H 2 O H va C H 3 C H O .