Chemical Adsorption or Chemisorption: When the force of
attraction existing between adsorbate and adsorbent are chemical forces of
attraction or chemical bond, the process is called Chemical Adsorption or
Chemisorption. Chemisorption takes place with formation of unilayer of
adsorbate on adsorbent. It has high enthalpy of adsorption. It can take place at
all temperature. With the increases in temperature, Chemisorption first
increases and then decreases.