$2.0 \, g$ of $H_2$ gas is adsorbed on $2.5 \, g$ of platinum powder at $300 \, K$ and $1 \, bar$ pressure. The volume of the gas adsorbed per gram of the adsorbent is $..... \, mL$.
(Given: $R = 0.083 \, L \, bar \, K^{-1} \, mol^{-1}$)

Select the correct statement for chemisorption.

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

For the adsorption of a gas on a solid,the slope of the linear plot of $\log(x/m)$ versus $\log(p)$ is .... ($n$ is an integer).

Adsorption of a gas on solids follows Freundlich adsorption isotherm. The graph drawn between $\log \frac{x}{m}$ (on y-axis) and $\log p$ (on x-axis) is a straight line with slope equal to $3$ and intercept equal to $0.30$. What is the value of $\frac{x}{m}$ at a pressure of $2 \ atm$?
(Given; $\log 2 = 0.3$ )

Assertion : $NH_3$ is absorbed more readily over activated charcoal than $CO_2$.
Reason : $NH_3$ is non-polar.