Q.

Which one of the following contains most acidic hydrogen atom.

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a

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b

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c

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d

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answer is D.

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Detailed Solution

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Acidic nature α- I and No.as resonance structure.

Acidity increases if 
1. More minus I effect is present.
2. The resulting ion is stable.
3. The proton is donated fast.
4.Conjugate base must be stable.

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