Exhausted permutit does not contain_ _ _ _ _ ion.

Options

A. `Na^(+)`
B. `Mg^(2+)`
C. `Al^(3+)`
D. `Si^(4+)`

Answer

(a)

Explanation

Aluminosilicate of sodium known as permutit (or) zeolite, is used to remove hardness of water by exchanging its ions with `Na^(+)`, hence exhausted permutit does not contain `Na^(+)` ions.