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A sample of a gas occupies 100 dm^(3) at...

A sample of a gas occupies 100 `dm^(3)` at 1 bar pressure and at `27^(o)C`.If the volume of the gas is reduced to `25 dm^(3)` at the same temperature, what additional pressure must be be applied?

A

5 bar

B

9 bar

C

3 bar

D

1 bar

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