Question

In the removal of permanent hardness of water by permutit process, \(Na^+\) ions of permutit are exchanged with which ions of water?

• A. \(K^+,\ Ba^{2+}\)
• B. \(Fe^{2+},\ K^+\)
• C. \(Ca^{2+},\ Mg^{2+}\)
• D. \(Zn^{2+},\ Cu^{2+}\)

Hint:

Permanent hardness is mainly due to \(Ca^{2+}\) and \(Mg^{2+}\). Permutit removes these ions by ion exchange with \(Na^+\).

Answer 1

The Correct Option is C