First slide

Alkynes

Question

Which one is strong acid, with reason, select the suitable option?

Moderate

A

Acetylene, ${sp}^{2}$ hybridization of carbons
B

Ethane, ${sp}^{2}$ hybridization of carbons
C

Acetylene, sp hybridization of carbon
D

Ethene, ${sp}^{3}$ hybridization of carbons

Solution

When hydrogen atom attached to sp hybridized carbon is more acidic than in comparision to that of ${sp}^{3}$ and ${sp}^{2}$ carbons which is due to the % of s- character increases. This leads to the increase in E.N of the carbon resulting stability of conjugate base as well.

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