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Question:

Buna-N synthetic rubber is a copolymer of:

H2C=CH−CNandH2C=CH−C(CH3)=CH2

H2C=CH−CH=CH2andH2C=CH−CH=CH2

H2C=CH−CH=CH2andH5C6−CH=CH2

H2C=CH−CNandH2C=CH−CH=CH2

Solution:

Buna - N is a copolymer of acrylonitrile (H2C=CH–CN) and buta-1,3-diene(H2C=CH–CH=CH2).Hence, the correct option is C.