1.

Assertion (A) : Permanent hardness of water is removed by treatment with washing soda. Reason (R): Washing soda reacts with soluble magnesium and calcium sulphate to form insolublecarbonates.

Answer»

STATEMENTS A and R both are CORRECT and R is the correct EXPLANATION of A.
A is correct but R is not correct
A and R both are correct but R is not the correct explanation of A.
A and R both are false.

Solution :(a) R is the correct explanation of A.


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