Ncert Exercises & Solutions

Given below are two statements:

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 insoluble carbonates.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.