A vessel contains $1$ mole of ${O_2}$ gas (molar mass $32)$ at a temperature $T.$ The pressure of the gas is $P. $ An identical vessel containing one mole of $He$ gas (molar mass $4)$ at temperature $2T$ has a pressure of
  • A$P/8$
  • B$P$
  • C$2P$
  • D$8P$
IIT 1997, Medium
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