1.

When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged withA. `H^+` ionsB. `Ca^(2+)` ionsC. `SO_4^(2-)` ionsD. `Mg^(2+)` ions or (e) `OH^-` ions

Answer» Correct Answer - B,D
Zeolite (hydrated aluminium silicate) exchanges `Na^+` ions with the `Ca^(2+)` and `Mg^(2+)` ions present in hard water.


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