Question

Assertion (A) : Synthetic detergents can lather well in hard water.

Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. 

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.

(d) A is false but R is true.

Answer 1

(a) Both A and R are true and R is the correct explanation of A.

Synthetic detergents can lather well in hard water. They also form soluble calcium and magnesium salts with hard water. Thus, both A and R are true and H is the correct explanation of A.