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Order of acidity of benzoic acid (I), 4-...

Order of acidity of benzoic acid (I), 4-methoxybenzoic acid (II), acetic acid (III) and 4-nitrobenzoic acid (IV) is

A

`IVgtIgtIIgtIII`

B

`IgtIIgtIVgtIII`

C

`IIIgtIgtIIgtIV`

D

`IIgtIgtIVgtIII`

Text Solution

Verified by Experts

The correct Answer is:
A
An electron-donating group decreases the strength of acids, while electron withdrawing group increases the strength of acids. A methoxy group is electron donating group, 4-methoxy benzoic acid is electron withdrawing group and will increase the strength of acids. Thus, correct order is
4-nitrobenzoic acid (IV) `gt` benzoic acid (I) `gt` 4-methoxy benzoic acid (II) `gt` acetic acid (III)
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