1.

When zeolite which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged withA. `H^(+)` ionsB. `Ca^(2+)`C. `Mg^(2+)`D. `Ca^(2+)` and `Mg^(2+)`

Answer» Correct Answer - D
Zeolite is hydrated sodium aluminium silicate. It replace the `Ca^(2+)` and `Mg^(2+)` ions present in hard water with `Na^(+)` ions.


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