Q2 / 160 · AP EAMCET 2004 · Chemistry

Exhausted permutit does not contain .......ion

  • Correct answer
    A
    $\mathrm{Na}^{+}$
  • B
    $\mathrm{Mg}^{2+}$
  • C
    $\mathrm{Al}^{3+}$
  • D
    $\mathrm{Si}^{4+}$

Solution

Permutit or zeolite is the aluminosilicate of sodium. It is used to remove hardness of water. It converts insoluble salts of $\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$ into soluble zeolites. It exchange these ions with $\mathrm{Na}^{+}$and water becomes soft. Thus exhausted permutit does not contain $\mathrm{Na}^{+}$ions.

Hence, the correct answer is option: 'A'.

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