Among the following compounds the strongest acid is: (A) HC ≡ CH (B) C6H6 (C) C2H6 (D) CH3OH

The carbon atom is attached to another carbon atom in acetylene, benzene and ethane. In methanol, the carbon atom is attached to the oxygen atom.

The electronegativity of oxygen is higher than the electronegativity of the carbon. Therefore, methanol is more electronegative than acetylene, benzene and ethane. Hence, the strongest acid is CH3OH

So, the correct option is (D)

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