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Answer» Difference between physical adsorption and chemical adsorption:– | Physical Adsorption | Chemical Adsorption | | (i) It is caused by intermolecular vanderwaal forces. | (i) It is caused by chemical bond formation. | | (ii) It is not specific. | (ii) It is specific. | | (iii) It is favourable at low temperature. It decreases with increase of temperature. | (iii) It is favourable at high temperature. It increases with increase of temperature. | | (iv) No involvement of activtion energy. | (iv) High activation energy is needed. | | (v) High pressure increases it. Decrease in pressure causes desorption. | (v) High pressure increases it. But no effect on decreasing pressure | | (vi) It forms multilayer at the absorbent. | (vi) It forms unilayer at absorbent. |
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