A vessel contains 1 mole of `O_2` gas (relative molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (relative molar mass 4) at temperature 2T has a pressure of

Options

A. `P/8`
B. `P`
C. `2P`
D. `8P`

Answer

C

Explanation

(c) `PV=nRT or P=(nRT)/V or PpropT`
`(:' V and n are same.)`
Therefore, if T is doubled, pressure also becomes two
times, i.e.., 2P.