Tyndall effect is observed when :

${\mathrm{CO}}_2$ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of ${\mathrm{CO}}_2$ adsorbed becomes $64$ times when the pressure of ${\mathrm{CO}}_2$ is doubled.

The value of $\mathrm{n}$ in the Freundlich isotherm equation is $\_\_\_\_$ $\times {10}^2.$ (Round off to the Nearest Integer)

$3.12 \mathrm{g}$ of oxygen is adsorbed on $1.2 \mathrm{g}$ of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at $1 \mathrm{atm}$ and $300 \mathrm{K}$ in $\mathrm{L}$ is            

$\left[\mathrm{R}=0.0821 \mathrm{L} \mathrm{atm} {\mathrm{K}}^{-1} {\mathrm{mol}}^{-1}\right]$