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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.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

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

Step-by-step solution

The negative slope is because of change of phase. This happens to liquids which contract on melting.

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