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pKb of NH3 is 4.74 and pKb of A^-, B^- a...

`pK_b of NH_3` is 4.74 and `pK_b` of `A^-, B^-` and `C^- `are 4,5 and 6` respectively. Aqueous solution of 0.01 M has pH in the increasing order.

A

`NH_4A lt NH_4B lt NH_4C`

B

`NH_4C lt NH_4B lt NH_4A`

C

`NH_4C lt NH_4A lt NH_4B = 7`

D

all have equal pH being salt to weak acid and weak base

Text Solution

Verified by Experts

The correct Answer is:
B
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