Question

Assertion(A): Hard water gives lather with soap easily.​

Reason(R): Salts of calcium and magnesium react with soap to form insoluble salts.

• A. (A) and (R) both are correct, and (R) is the correct explanation of (A).
• B. (A) and (R) both are correct, but (R) is not the correct explanation of (A)
• C. (A) is not correct, but (R) is correct.
• D. (A) is correct, but (R) is not correct

Answer 1

The correct option is C (A) is not correct, but (R) is correct.

Hard water contains dissolved chlorides, sulphates and bicarbonates of calcium or magnesium. It does not gives lather with soap easily because the salts of calcium and magnesium react with soap . So assertion is false.

The salts of calcium and magnesium react with soap to form insoluble precipitate of salts.So the reason is true.