Q24Multiple correct
Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of
- (i)Chlorides of Ca and Mg in water
- (ii)Sulphates of Ca and Mg in water
- (iii)Hydrogen carbonates of Ca and Mg in water
- (iv)Carbonates of alkali metals in water
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(i) Chlorides of Ca and Mg in water
(ii) Sulphates of Ca and Mg in water