Question

Match list I with list II and select the correct answer using the codes given below the lists

Answer 1

Heavy water is $D_{2}O$

Temporary hard water contains bicarbonates of $C{a}^{2+}$ and $M{g}^{2+}.$

Soft water may have no foreign ions.

Permanent hard water contains sulphates and chlorides of $C{a}^{2+}$ and $M{g}^{2+}.$