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

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

Tardigrade Admin · Accepted Answer

We cannot get steam directly from ice. There is one intermediate state called water whose temperature has to be raised to 100° 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.

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

If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion

If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion

If Assertion is true but the Reason is false

If both Assertion and Reason are false

We cannot get steam directly from ice. There is one intermediate state called water whose temperature has to be raised to $10 0^{\circ} C$ 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.

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