C)2,5
D)1,4
16.Polikondensatsiya reaksiyasi yordamida qanday yukn i molekulyar birikmalar olinadi . 1) bo’tadienstirol kauchugi ; 2) kapron ; 3) izopren kauchugi ; 4) lavsan ; 5) polipropilen ; , 6) polietilen ; 7) fenolformaldegid smolasi ; 8) polivinil xlorid
A)1,6,8
B)2,4,5
C)2,4,7
D)1,3,8
17. Polietilen (−CH2−CH2−)n molekulasidagi asosiy uglerod zanjiri uzunligi 308 nm ga teng bo’lsa , polimerlanish darajasini aniqlang. l(C−C)=0,154 nm
A)200
C)2000
D)1000
18. Yuqori molekulali modda izobutilenning polimerlanish reaksiyasi nat ijasida olingan . Uning struktur zvenosini toping. 1)−CH2C(CH3)2 2)−CH2C(CH3)=CH− 3)−CH(CH3)CH(CH3)− 4)−CH2CH(C2H5)−
A) 4
B) 1
C)3
D)2
19. Quyidagi genetik o’zgarishlar qatorida qaysi X modda hosil bo’ladi? Izobutan +Br2,−hv→A+KOH+spirt→→B-polimerizasiya→X→�
A) (−CH2CHCHCH2−)n
B) (−CH2CH(C2H5)−)n
C) (−CH(CH3)CH(CH3)−)n
D) (−C(CH3)2CH2−)n
20. (−CH2−CH2−) 20000 bo’lgan polietilen molekulasining asosiy uglerod zanjiri uzunligini (nm) hisoblang l (C-C)=0, 154 nm
Xatolik topdim
A) 616
B) 308
C)61,6
D)30,8
21. Polipropilen tarkibidagi N(H)−N(C) =450 bo’lsa,polimerning molekulyar massasini hisoblang ?
A)8400
B)4200
C)6300
D)10500
22.Akril kislotaning polimerlanishidan olingan yuqorimolekulyar birikmaning zvenosining tuzilishini ko’rsating ?
A)-C(CH3)(COOCH3)CH2-
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