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Arrange the following compounds in increasing order of acidity and give a suitable explanation.

Phenol, o-nitrophenol, o-cresol
 

Answers (1)

The acidity factor of these compounds depends on the type of groups attached. If the group is electron-withdrawing, they increase the acidity of the compound due to (-I) and (-R) effect, which is exactly the case in o-nitrophenol, making it most acidic. Also, due to the (+I) effect depicted by o-cresol, it is weaker than phenol.

 So, the correct Increasing order of the acidity of the given compounds: o-cresol < Phenol < o-nitrophenol.

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