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A vessel contains 2 gm of gas and the pr...

A vessel contains 2 gm of gas and the pressure is 40 cm of Hg. Under the same conditions , if 1 gm of gas is introduced into the vessel , the pressure will be

A

40 cm of Hg

B

20 cm of Hg

C

76 cm of Hg

D

60 cm of Hg

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