Hydrogen can be adsorbed in the interstitial spaces between $Pd$ atoms. This phenomenon is known as ...........

Choose the correct statement for chemical adsorption.

The charge on colloidal particles is due to

Sticking of one substance at the surface of another is called:

The graph given below shows the relationship between the extent of adsorption $(x / m)$ and pressure at different temperatures. The correct order of temperatures for curves $i$,$ii$,and $iii$ is:

Which one of the following statements is not correct?