Question

Assertion: At room temperature water does not sublimate from ice to steam.
Reason: The critical point of water is much above the room temperature.

• A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
• C. If Assertion is true but the Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (C)

We cannot get steam directly from ice. There is one intermediate state called water whose temperature has to be raised to $100^{\circ} C$ before we can get steam. Critical point is that temperature at which a gas can be liquefied by applying pressure. So, water cannot have a critical point.