Which of the following orders regarding acidic strength is correct?

C H_{3} C O O H > C H_{3} C H_{2} O H > C H \equiv C H

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C H_{3} C O O H > C H \equiv C H > C H_{3} C H_{2} O H

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C H \equiv C H > C H_{3} C O O H > C H_{3} C H_{2} O H

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C H \equiv C H > C H_{3} C H_{2} O H > C H_{3} C O O H

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Solution

The correct option is A $C H_{3} C O O H > C H_{3} C H_{2} O H > C H \equiv C H$
Acidic strength $\propto$ Stability of the conjugate base

Carboxylate ion is stabilized by resonance.

Among alkyne and alcohol, the conjugate base of alcohol is more stable.
Hence, option A is the correct order of acidic strength.

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