When is the term 'sorption' used?

Why does the white precipitate of silver halide become coloured in the presence of dye eosin?

For the adsorption of hydrogen on platinum,the activation energy is $30 \ kJ \ mol^{-1}$ and for the adsorption of hydrogen on nickel,the activation energy is $41.4 \ kJ \ mol^{-1}$. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at $300 \ K$ is $........$ (Nearest integer). Given: $\ln 10 = 2.3$,$R = 8.3 \ J \ K^{-1} \ mol^{-1}$.

Which one of the following equations represents the Freundlich adsorption isotherm?

Select the correct statement.

Explain the mechanism of adsorption.