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Assertion : When a gas is allowed to e...

Assertion : When a gas is allowed to expand, work done by gas is positive. Reason : Force due to gaseous pressure and displacement (of piston) are in the same direction

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Since the gaseous pressure and the displacement (of piston) are in the same direction. Therefore `theta = 0^(@)`
`therefore` Work done `= Fs cos theta = Fs` = Positive
Thus during expansion work done by gas is positive.
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