Question

Assertion(A): At absolute zero the entropy of a perfectly crystalline substance is taken as zero

Reason(R): At zero degree absolute the constituent particles become completely motionless

• 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 but R is false.
• D. both A and R are false.

Answer 1

The correct option is A both A and R are true and R is the correct explanation of A.

At absolute zero degree the constitute particles become completely motion less
Entropy is the measure of randomness since the constitute particles are motion less therefore entropy is taken as zero at absolute zero