What will be answer?

Question

Adding K2SO4 into BaCl2 solution will result into precipitation of BaSO4 which is non-volatile, and therefore boiling point of solution will be increased and its freezing point will decrease.

a-Boiling point decreases.

b-freezing point decreases.

c- boiling point increases.

d-freezing point increases.

Answer 1

The answer is already hidden in your question.

Read this point ==> boiling point of solution will be increased and its freezing point will decrease.

So the answer will be

b. freezing point decreases.

c. boiling point increases.

Answer 2

On adding salt to the water, its freezing decreases and boiling point increases because of the effect of Vont Hoff factor, i; for NaCl the value of i=2