NEET Chemistry Hydrogen Questions Solved


Permanent hardness of water can be removed, by adding –

(A) Sodalime

(B) Sodiumbicarbonate

(C) Washing soda

(D) Sodium chloride

(C).  Washing soda removes both the temporary and permanent hardness by converting soluble

        calcium and magnesium compounds into insoluble carbonates. 

                     CaCl2+Na2CO3          CaCO3+2NaCl             CaSO4+Na2CO3            CaCO3+Na2SO4             CaHCO32+Na2CO3            CaCO3+2NaHCO3

Difficulty Level:

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