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Question

There is 10 litre of gas at STP. Which of the following changes keeps the volume constant:

A
273K and 2atm
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B
273C and 2atm
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C
546C and 0.5atm
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D
0C and 0atm
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Solution

The correct option is D 273C and 2atm
There is 10 litre of gas at STP. The changes 273C and 2atm keeps the volume constant.
PV=nRT
Hence, VTP (at constant n).
Thus, when both temperature and pressure are doubled, the volume remains constant.

Hence, the correct option is B

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