When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged with

Options

A. `Ca^(2+) or Mg^(2+)` ions in zeolite are replaced by `Na^(+)` ions in hard water.
B. Ca^(2+)` ions in zeolite are replaced by `Mg^(2+)` ions in hard water.
C. `Na^(+)` ions in zeloite are replaced by `Ca^(2+)` and `Mg^(2+)` ions in hard water.
D. None is correct.

Answer

C

Explanation

It is the correct answer, `Ca^(2+) and Mg^(2+)` ions which make water hard are replaced by `Na^(+)` ions of zeolite,