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Q.

When an isolated gas expands against vacuum, then 
(a) No work is done in the process
(b) Internal energy does not change at in the end of process
(c) The process is like adibatic

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a

a, b, c are true

b

both a and c are true

c

both a and b are true

d

both b and c are true

answer is D.

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Detailed Solution

Statements a, b and c are  correct during free expansion.

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