Chemistry - Complete s-block Question with Solution | TestHub

Heavy water is${\mathrm{D}}_2\mathrm{O}\mathrm{}(1-\mathrm{b})$
Temporary hard water contains bicarbonates of$\mathrm{C}{\mathrm{a}}^{2+}$and$\mathrm{M}{\mathrm{g}}^{2+}(2-\mathrm{a})$
Soft water may have no foreign ions$(3-\mathrm{d})$.
Permanent hard water contains sulphates and chlorides of$\mathrm{C}{\mathrm{a}}^{+2}$and$\mathrm{M}{\mathrm{g}}^{2+}(4-\mathrm{c})$