Question

Assertion: At zero kelvin temperature, the volume occupied by a gas is negligible.
Reason: Molecular motion ceases at 0 K.

• A. Both assertion and reason are correct and reason is correct explanation for assertion.
• B. Both assertion and reason are correct but reason is not correct explanation for assertion.
• C. Assertion is correct but reason is incorrect.
• D. Assertion is incorrect but reason is correct.

Answer 1

The correct option is D

Assertion is incorrect but reason is correct.

The explanation for Assertion statement

• At zero kelvin temperature gaseous state is not possible for any substance because all substances becomes solid at this temperature.

The explanation for Reason statement

• Yes, Molecular motion ceases at 0 K Because it is absolute zero temperature (minus 273 degrees Celsius).
• All the substance becomes solid at this temperature.

Hence option D is correct.