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Physisorption

Adsorption wh...

Question

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

A

Physical adsorption

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B

Chemisorption

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C

Both physical and chemical adsorbtion

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D

None of the above

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Solution

The correct option is A Physical adsorption
Physical adsorption or physisorption is a type of adsorption which arrives because of Vanderwaal forces and it is favourable at low temperature

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Q. Assertion :In physical adsorption, enthalpy of adsorption is very low. Reason: In physical adsorption, attraction between gas molecules and solid surface is due to weak van der Waals forces.

Which statement is/are correct?

i) Physical adsorption is due to Van der Waal's forces

ii) Physical adsorption decreases at high temperature

iii) Physical adsorption is irreversible

iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Q. Low temperature favours physical adsorption and high temperature favours chemical adsorption.

Which statement is/are correct?

i) Physical adsorption is due to Van der Waal's forces

ii) Physical adsorption decreases at high temperature

iii) Physical adsorption is irreversible

iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Physical adsorption is high at high temperature while chemical adsorption is high at low temperature.

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