When `NH_(4)Cl` is added to a solution of `NH_(4)OH :`

Options

A. the dissociation of `NH_(4)OH` increases
B. the concentration of `OH^(-)` increases.
C. the concentration of both `OH^(-)` and `NH_(4)^(+)` increase
D. the concentration of `OH^(-)` ion decreases.

Answer

D

Explanation

`NH_(4)ClhArrNH_(4)^(+)+Cl^(-)" "," "NH_(4)OHhArrNH_(4)^(+)+OH^(-)`
Because of common ion effect , the ionisation of `NH_(4)OH` is suppressed.