Benzoic acid is more acidic than acetic ...

Benzoic acid is more acidic than acetic acid, fomic acid is more acidic than benzoic acid, among monsoubstituted benzoic acid derivative, the ortho derivative is more acidic than meta and para substiued acid due to ortho effect. Acidity of an acid can be explained base of which compound will be most stable?
Which one the following is most acidic?

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The correct Answer is:

`-NO_(2)` is strong `(-I)` group

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Benzoic acid is more acidic than acetic acid, fomic acid is more acidic than benzoic acid, among monsoubstituted benzoic acid derivative, the ortho derivative is more acidic than meta and para substiued acid due to ortho effect. Acidity of an acid can be explained base of which compound will be most stable? Compare acidic strength of the following :

`RgtQgtP`

`PgtQgtR`

`QgtPgtR`

`PgtRgtQ`

Benzoic acid

Acetic acid

Phenol

Benzene sulphoric acid

`CH_(3)CH_(2)-NO_(2)`

`CH_(3)-overset(NO_(2))overset(|)CH-CH_(3)`

`O_(2)N-CH_(2)-NO_(2)`

`NC-CH_(2)-CN`