Assertion : Acetylene on reacting with sodamide gives sodium acetylide and ammonia.
Reason : sp hybridised carbon atoms ofacetylene are considerably electronegative.

Options

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
C. If Assertion is correct , but Reason is incorrect.
D. If both Assertion and Reason are incorrect .

Answer

A

Explanation

Acetylene on reaction with sodamide give sodium acetylide and ammonia .
`CH-=CH overset(NaNH_2)to underset"monosodium acetylide"(HC-=barCoverset(+)(Na))+NH_3`
Here formation of sodium acetylide can be explained by sp-hybridisation of carbon atom. As we know that an electron is s-orbital is more tightly held than in a p-orbital. In sp hybridisation, s-character is 50% as compared to `sp^2` (33%) or `sp^3` (25%).So, due to large s-character the carbon atom is quite electronegative and hence Na of `NaNH_2` can replace `H^+` of C-H bond.