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A solution is prepared by mixing 100 ml of 0.1 M `NH_(4) OH` and 200 ml of 0.2 M `NH_(4) Cl` . pK_(b)` of `NH_(4) OH` is 4.8 . Then the pH of the solution is

A

`9.0`

B

`8.0`

C

8.5979

D

5.4021

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The correct Answer is:
C
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