Question

The density of neon will be highest at:

• A. STP
• B. $0^{o}C$, 2 atm
• C. ${273}^{o}C$, 1 atm
• D. ${273}^{o}C$, 2 atm

Answer 1

The correct option is B $0^{o}C$, 2 atm

The ideal gas equation is $PV=nRT=\frac{w}{M}RT$.

The above equation is rearranged to obtain

$\Rightarrow PM=\left(\frac{w}{V}\right)RT=dRT$.

Here, d represents the density.

Hence, the expression for the density becomes

$\Rightarrow d=\frac{PM}{RT}$.

Thus low temperature and high pressure result in greater density.

Thus, the density of neon will be highest at $0^{o}C,2atm$.

Hence, the correct option is $\text{B}$