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Which has highest pk(a) value...

Which has highest `pk_(a)` value

A

`R_(3)C-NH_(2)`

B

`R_(2)NH`

C

`R-NH_(2)`

D

`NH_(3)`.

Text Solution

Verified by Experts

The correct Answer is:
D
Only `2^(@)` and `3^(@)` amines do not liberate `N_(2)` on reaction with `HNO_(2)`. All the given amines are `1^(@)` except tri-methylamine which is `3^(@)`. Thus, option (A) is correct.
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