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Give the increasing order of pK(a) value...

Give the increasing order of `pK_(a)` value of the folliwng compounds?

A

`(I) lt (III) lt (II)`

B

`(I) gt (II) gt (III)`

C

`(II) lt (III) lt (I)`

D

`(IIII) gt (II) gt (I)`

Text Solution

Verified by Experts

The correct Answer is:
`a`
(I) `C_(9) H_(10) overset(-H^(o+))(rarr) C_(9) H_(9)^(o-)` (Aromatic)

Acidic character: `(I) gt (III) gt (II)`
`pK_(a)` order: `(I) lt (III) lt (II)`.
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