Which of the following diamines is not used to prepare useful polyimid – McqOptions

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1.	Which of the following diamines is not used to prepare useful polyimides?
A.	m-phenylene diamine
B.	benzidine
C.	m-benzylene diamine
D.	4,4-diaminodiphenylether
Answer» D. 4,4-diaminodiphenylether

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