Question

Assertion : The melting point of ice decreases with increase of pressure.
Reason : Ice contracts on melting.

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

Answer 1

Answer: (B)

On increasing the pressure, melting point of ice decreases. Certain substances do not expand but contract when heated within a certain range of temperature. Water is one such example. If ice is taken at $0^{\circ }C$ and start heating it we find that in the temperature range $0^{\circ }C$ to $4^{\circ }C$ it contracts instead of expanding.