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Physical Properties of Alkynes

Which of the ...

Question

Which of the following hydrocarbon would give red ppt on reacting with ammoniacal cuprous chloride solution?

A

butyne

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B

2-butene

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C

2-butyne

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D

butane

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Solution

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

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