Question

# Give the correct order of increasing acidity of the following compounds.

A
III<I<II<IV
B
III<II<I<IV
C
III<I<IV<II
D
IV<II<I<III

Solution

## The correct option is B $$III < II < I < IV$$Alcohols are more acidic than terminal alkynes. It is evident that the weakest acid of the lot is $$IV$$. Phenols are more acidic than alcohols due to resonance stabilisation of its conjugate base. But Phenols are less acidic than any carboxylic acid.Hence the correct order of increasing acidity is $$IV<II<I<III$$Therefore, Option B is correct.Chemistry

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