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Question: Answered & Verified by Expert
Assertion : In pressure-temperature $(P-T)$ phase diagram of water, the slope of the melting curve is found to be negative.
Reason : Ice contracts on melting to water.
PhysicsThermal Properties of MatterAIIMSAIIMS 2005
Options:
  • 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.
Solution:
2274 Upvotes Verified Answer
The correct answer is: If both assertion and reason are true and reason is the correct explanation of assertion
The negative slope is because of change of phase. This happens to liquids which contract on melting.

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