4.16. T o lapsan ( - C O- C 6 H 4- C O - O - C H j - C H j - ^ duac d i ^ u chS' nho phan dtig : phan dtig :
A . T r i i n g ngung; B . C6ng hgp ; C. T r u n g hop ; D . D 6 n g triing hap ; C. T r u n g hop ; D . D 6 n g triing hap ; Hay chpn dap an diing.
4 17. Polime c6 cS'u tao mang khdng gian Ik :
A . Thijy tinh hiru co plexiglas. ; s
B. T o n i t r o n . C. Cao su l u u h6ạ C. Cao su l u u h6ạ D- Cao su isopren. Hay chon dap an diing.
4.18. Tién hanh triing hop 20,8 gam stiren. H6n hgp thu dugc sau phan umg tac dung vira dii v6'\0 ml dung dich Br2 0 , 2 M . tac dung vira dii v6'\0 ml dung dich Br2 0 , 2 M .
Hieu suat phan i/ng triing hop la :
A . 25% ; B. 5 0 % ; C. 6 0 % ; D . 7 5% . C. 6 0 % ; D . 7 5% . Hay chon dap s6' diing.
4.19. K h i triing hgp etilen o dieu k i e n ap suS't cao, thu dugc l o a i p o l i e t i l c n (PE) c6 phan tir kh6'i trung binh la 100.000 u ( d v C ) . (PE) c6 phan tir kh6'i trung binh la 100.000 u ( d v C ) .
He s6' polime h6a (hay he s6' trung hgp) la :
A . n = 2 1 4 2 ; B. n = 3 9 1 5 ; C. n = 3 6 0 9 ; D . n = 3 5 7 1 . C. n = 3 6 0 9 ; D . n = 3 5 7 1 . Hay chon dap an dung.
'^•20. Phan tir khd'i ciia m6t loai P V C la 400.000 ụ S6' nguyen tijr clo c6 trong 1 phan tir P V C la :
A . 5000 nguyen t i r ; B . 3550 nguyen t i r ; C. 6400 nguyen t u ; D . 4500 nguyen tir. C. 6400 nguyen t u ; D . 4500 nguyen tir. Hay chon dap an diing.
4 2i
P o l i v i n y l clorua ( P . V . C ) CO cáu tao mach :
• • . - C H 3 - C H- C H 2 - C H- C H 2 - C H- C H 2 - C H - . . .
CI , C i C I C I i S6' mat x i c h trong doan mach tren la :