Correct option: 4)
Using the ideal gas equation, we evaluate the value of density by making modification,
![\[\begin{aligned} &\therefore PV = nRT \\ &\Rightarrow PV =\frac{ m }{ M } RT \quad \therefore m =\rho V \\ & PV =\frac{(\rho V ) RT }{ M } \\ &\rho=\frac{ PM }{ RT } \Rightarrow \frac{249 \times 10^{3} \times 2 \times 10^{-3}}{8.3 \times 300} \Rightarrow 0.2 kg / m ^{3} \end{aligned}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-82be5c3533fe0d42a2baab3f124a4b07_l3.png "Rendered by QuickLaTeX.com")
A cylinder contains hydrogen gas at pressure of 
(1) 
