1.

Temporary hardness of water is due to compound 'A' and can be removed by adding compound 'B’. A and B respectively can be : (1) Mg(HCO5)2, CaCO3 (2) CaSO4, HCl (3) CaCl2, MgSO4 (4) Ca(HCO3)2 ,Ca(OH)2

Answer»

(4) Ca(HCO3)2 , Ca(OH)2



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