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If dissociation constant of ammonia is 1...

If dissociation constant of ammonia is `10^(-5)`, its `pK_(b)` and `pK_(4)` value respectively are

A

5 and 9

B

9 and 5

C

7 and 7

D

4 and 10

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(b)` of `NH_(3)` is `10^(-5)` (given)
`:. pK_(b) = 5` and `pK_(a) = 14 - 5 = 9`
Hence, `pK_(b)` and `pK_(a)` values are 5 and 9 respectively.
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