Question

Organic ion exchange resins purify hard water to yield :

• A. Distilled water
• B. Only decalcified water
• C. Deionised water
• D. Water having relatively high concentration of $O{H}^{-}$ion

Answer 1

The correct option is B Only decalcified water

Organic ion exchange resins are used for water softening. In this process, the $C{a}^{+2}$ and $M{g}^{+2}$ ions which cause hardness are exchanged for $N{a}^{+}$ or $K^{+}$ ions due to which the water becomes decalcified or hardness free. Therefore, organic ion exchange resins purify hard water to yield only decalcified water