1.

Arrange the following in increasing order of their acidity? o-cresol(a), salicyclic acid(b), phenol( c)

Answer»

`cltaltb`
`bltclta`
`altblta`
`ALTCLTB`

Solution :
Electron RELEASING GROUPS `(-CH_(3), -OCH_(3), -NCH_(3)` etc) intensify the negative charge of phenoxide ion, i.e., destablises it hence decrease ionization of parent phenol. Therefore DECREASES acidity while electronwith drawing groups `(-NO_(2), -COOH, -CHO` etc.) INCREASES acidity.


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