Give any four characteristics of chemical adsorption.

Explanation

The different characteristics of chemical adsorption are as follows:
i) Specificity : Chemical adsorption is highly specific in nature. It adsorbs only those gases which have high value of liquefication. ii) Nature of chemical adsorption : Chemical adsorption is irreversible in nature. iii) Heat of adsorption : Chemical adsorption has high heat of adsorption that is 80-240 kJ `"mol"^(-1)` . iv) Effect of temperature : Chemical adsorption increases initially with increase in temperature but finally decreases with further increase in temperature.