(i) $F_{3} C - C O O H$
(ii) $C H_{3} C O O H$
(iii) $C_{6} H_{5} C O O H$
(iv) $C H_{3} C H_{2} C O O H$
Correct order of $p K_{a}$ value is?

1 > 3 > 2 > 4

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4 > 2 > 3 > 1

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4 > 3 > 2 > 1

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1 > 2 > 4 > 3

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Solution

The correct option is A $4 > 2 > 3 > 1$
Solution:- (B) $4 > 2 > 3 > 1$
As we know that stronger the acid, lower the value of p{K}_{a}$.
Hence the correct order of $p K_{a}$ value is-
$4 > 2 > 3 > 1$

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