Question

Assertion(A): Temperature in kelvin scale is always positive.
Reason(R): The least possible temperature in kelvin scale is 0 K or -273$°\mathrm{C}$

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true but R is not the correct explanation of A.
• C. A is true and R is false.
• D. A is false and R is true.

Answer 1

The correct option is A

Both A and R are true and R is the correct explanation of A.

Explanation for Assertion statement:

0 K is the lowest possible temperature in kelvin scale.

Explanation for Reason statement:

• Negative temperature is not possible in kelvin scale, because atom stops moving below 0 K i.e. they do not have energy.
• So it has lowest possible value as 0 K.

Both A and R are true and R is the correct explanation of A.

Hence the correct option is (A)