Q.

Which of the following compound gives red ppt. with Cu2Cl2/NH40H?

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a

CH3C=CCH=CH2

b

CH3CH2CCH

c

CH3CCCH3

d

CH3CH2CH=CH2

answer is B.

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Detailed Solution

Copper Acetylide is obtained as a red precipitate when a terminal alkyne is passed through an ammoniacal solution of cuprous chloride.

CH3CH2CCH
correct option is B. 

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