The $p H$ of $1 N$ aqueous solutions of $H C l, C H_{3} C O O h$ and $H C O O H$ follows the order.

H C l > H C O O H > C H_{3} C O O H

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C H l = H C O O H > C H_{3} C O O H

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C H_{3} C O O H > H C O O H > H C l

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C H_{3} C O O H = H C O O H > H C l

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Solution

The correct option is D $C H_{3} C O O H > H C O O H > H C l$
As the $n_{f}$ for all the acids are same therefore the strongest acid will have lowest pH and vice versa.

$C H_{3} C O O H > H C O O H > H C l$

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