Assertion (A) & Reason (R ) Type Questions
(A): During a free expansion of an ideal gas workdone is zero
(R): Workdone against vacuum is zero

Options

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

Answer

B