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Comparison of Physisorption and Chemisorption

Adsorption wh...

Question

Adsorption which arrives because of chemical bond and sometimes high activation energy needed is known as:

A

Physisorption

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B

Chemisorption

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C

Both physisorption and chemisorption

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D

None of the above

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Solution

The correct option is B Chemisorption
Chemisorption is a type of adsorption which arrives because of chemical bond and sometimes high activation energy is needed.

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Q. The correct statement(s) pertaining to the adsorption of a gas on a solid surface is(are):
(i) adsorption is always exothermic.

(ii) physisorption may transform into chemisorption at high temperature.
(iii) physisorption increases with increasing temperature but chemisorption decreases with increasing temperature.
(iv) chemisorption is more exothermic than physisorption, however, it is very slow due to the higher energy of activation.

Q. Assertion :Physical adsorption of molecules on the surface requires activation energy. Reason: Because the bonds of adsorbed molecules are broken.

Q. Adsorption which arrive because of van der waals forces and low temperature is feverable for adsorption :

Q. Statement: Physical adsorption is weaker than chemical adsorption.
Explanation: Activated complex formed during adsorption possess lower energy level in chemisorption as it is more exothermic.

Q. Which among physisorption and chemisorption has a higher enthalpy of adsorption?

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