Question

difference between physical adsorption and chemical adsorption​

Answer 1

Answer:-

Physical absorption:-  

i) It takes places at low temperature and decreases with increase in temperature.

ii) Van Der Waals force is the force helding the adsorbate.

iii) It is reversible.

iv) Not specific.

v) It forms a multimolecular layer.

vi) It is dependent of pressure and temperature.

vii) Examples - Clay, silica gel.

Chemical Absorption:-  

i) It is specific in nature . It involves chemical bonds between the gas molecules and the adsorbent surface.

ii) It requires a certain level of energy of activation.

iii) The rate of chemical adsorption is directly proportional to the surface area.

iv) It forms a unimolecular layer.

v) It is reversible in nature.

vi) It is slow at low temperature and occurs at a higher rate with an increase in pressure.

vii) Example: Rubbing pain balm on the forehead.

Explanation:-

Hope it helps. Please mark as brainliest.