Among the following compounds, the strongest acid is

H C \equiv C H

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N H_{3}

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C H_{2} = C H_{2}

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C H_{3} O H

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Solution

The correct option is D $C H_{3} O H$
$Acidic strength \propto stability of conjugate base \propto E.N. of atom containing hydrogen$
the correct order of stability of conjugate base is
$C H_{3} O^{-} > C H \equiv C^{-} > N H_{2}^{-} > C H_{2} = C H^{-}$
sp hybrid carbon is more electronegative than nitrogen.
Hence, correct stability order is $C H_{3} O H > C H \equiv C H > N H_{3} > C H_{2} = C H_{2}$

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