During adsorption,the $\Delta H$ is negative and the magnitude of this negative value

The decomposition of phosphine $(PH_3)$ on tungsten at low pressure is a first-order reaction. It is because the

What is the range of enthalpy of adsorption in physical adsorption? $(kJ \, mol^{-1})$

The graph between $\log (\frac{x}{m})$ and $\log P$ is provided for the adsorption of $NH_3$ gas on a metal surface. Calculate the weight of $NH_3$ gas adsorbed by $50 \ gm$ of the metal surface at $2 \ atm$ pressure. (in $gm$)

Which can adsorb a larger volume of hydrogen gas?

Explain the following terms related to Adsorption Chromatography:
$(a)$ Principle of Adsorption chromatography.
$(b)$ Adsorbent.
$(c)$ Mobile phase.
$(d)$ Adsorbate.