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Arrange the following in the decreasing ...

Arrange the following in the decreasing order of their acidity.

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The correct Answer is:
Acid strength order: `I gt II gt IV gt V gt III`
Step-1. III will be least acidic as it has no dispersion of negative charge (No delocalisation of negative charge).
Step-2 Since-1 -m group will increase acid strength, Nitrohenol will be most acidic followed by phenol.
Step-3, Amongst cresol and methoxphenol , methoxyphenol has +M effect of `-OCH_(3)` which increases `e^(-)` density hence, decrease acidic strength.
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