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Question


Which of the following compounds can bring the given conversion?

A
NaNH2,CH3CHO
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B
NaNH2, CH3CH2CH2Br
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C
KOH, CH3CH2Br
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D
(b) and (c) above
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Solution

The correct option is B NaNH2, CH3CH2CH2Br
Preparation of Higher Alkynes from Lower Alkynes :
By treating it with sodium metal at high temperature or with sodamide (NaNH2)
Resulting in the formation of its sodium salt, followed by the reaction with alkyl halide.
The given product can be formed as shown :



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