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The correct option in which the density of argon (Atomic mass = 40) is highest:
A
STP
B
$0^\circ C$, 2 atm
C
$0^\circ C$, 4 atm
D
$273^\circ C$, 4 atm
Detailed Solution
$\rho=\dfrac{PM}{RT}$. For maximum density, pressure should be maximum and temperature should be minimum. Among the options, $0^\circ C$ (lowest given temperature) at 4 atm (highest given pressure) gives the highest density.