Which of the following gases is evolved as a byproduct (A) in the following reaction,
$HC \equiv CH + LiNH_{2} solvent HC = C^{-} Li^{+} + (A)$

Question

Which of the following gases is evolved as a byproduct (A) in the following reaction, HC ≡ CH + LiNH 2 ​ solvent ​ HC = C − Li + + ( A )

TestHub · Accepted Answer

The reaction between ethyne and lithium amide is an acid-base reaction.

Ethyne has acidic hydrogen atoms due to the sp hybridized carbon atom. Lithium amide is a strong base.

The amide ion abstracts a proton from ethyne to form lithium acetylide and ammonia gas.

$HC \equiv CH + LiNH_{2} \to HC \equiv C^{-} Li^{+} + NH_{3}$

The byproduct (A) is $NH_{3}$ .

Answer: $NH_{3}$

Chemistry - Hydrocarbon Question with Solution | TestHub

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