Adsorption: Physisorption, Chemisorption, Mechanism of Adsorption etc Adsorption is the deposition of molecular species onto the surface It differs from absorption which is a physical or chemical phenomenon in which atoms, molecules or ions enter some bulk phase Let us know more about Absorption and its significance
What is the effect of temperature on chemisorption? - Toppr Assertion :Physisorption of a gas adsorbed at low temperature may change into chemisorption at a high temperature Reason: Usually low pressure is also favourable for chemisorption
If the absorbate is held on a surface by weak van der Waals . . . - Toppr Correct option is A physical adsorption The adsorption in which molecules of adsorbate are held on the surface of adsorbent by Van der Waals forces or weak physical forces is called as physical adsorption or Van der Waals adsorption or physisorption
Give an example where physisorption changes to chemisorption . . . - Toppr The process of physisorption, for example that of H 2 on finely divided nickel, involves weak van der Waals' forces With increase in temperature, hydrogen molecules dissociate into hydrogen atoms which are held on the surface by chemisorption
The correct statement (s) pertaining to the adsorption of a gas on a . . . The correct statement (s) pertaining to the adsorption of a gas on a solid surface is (are): Adsorption is always exothermic Physisorption may transform into chemisorption at high temperature Physisorption increases with increasing temperature but chemisorption decreases with increasing temperature Chemisorption is more exothermic than physisorption but it is very slow due to higher energy