1.

Arrange the following compounds in the increasing order of their acidic strength (i) m-nitrophenol (ii) m-cresol (iii) phenol (iv) m-chlorophenol

Answer»

`ii lt IV lt iii lt` `i`
iiltiiilt``iltiv`
`iii lt ii lt ``iltiv`
`iiltiiiltivlti`

Solution :Stronger the electron WITHDRAWING group, stornger the phenol, i.e., m-nitrophenol (i) is a stronger acid than m-chlorophenol (iv). Electron DONATING groups decrease the acidity of PHENOLS. i.e., m-cresol (ii) is a weaker acid than phenol (iii). Thus, the overall acid strength increses in the order: `iltiii lt iv lt i` i.e., option (d) is correct.


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