At 25^(@)C and 1 atm, a vessel contains ...

At `25^(@)C` and 1 atm, a vessel contains 20 L of an ideal gas. If the volume of vessel increased to 40 L, the pressure exerted by gas in vessel will be `"______________"`.

2 atm

1 atm

1.5 atm

0.5 atm

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