Question

The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and $NH_4NO_3$ dissolves lowering the temperature. Addition of nonvolatile solute into solvent results into depression of freezing point of solvent.

• A. If both assertion and reason are true and reason is the correct explanation of the assertion
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion
• C. If assertion is true, but reason is false
• D. Both assertion and reason are false statements

Answer 1

Answer: (A)

If both assertion and reason are true and reason is the correct explanation of the assertion

Answer 2

The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and $NH _{4} NO _{3}$ dissolves lowering the temperature because addition of non-volatile solute into solvent results into depression of freezing point of the solvent. So both are true and correct explanation.