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प्रश्न
Extent of physisorption of a gas increases with ______.
विकल्प
increase in temperature.
decrease in temperature.
decrease in surface area of adsorbent.
decrease in strength of van der Waals forces.
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उत्तर
Extent of physisorption of a gas increases with decrease in temperature.
Explanation:
As the process of adsorption is an exothermic one; physical adsorption occurs readily at low temperature and decreases with an increase in the temperature as equilibrium shifts in the backward direction. This is known as Le-Chatelier's principle.
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संबंधित प्रश्न
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Differentiate between adsorbtion and absorption.
What is the effect of temperature on chemisorption ?
Why are powdered substances more effective adsorbents than their crystalline forms?
Give reason why a finely divided substance is more effective as an adsorbent.
Physisorption is reversible while chemisorption is irreversible. Why ?
Answer in one sentence:
Name type of adsorption in which the compound is formed.
Which of the following is true about chemisorption?
Which among the following is a property of physisorption?
Powdered substances are more effective adsorbents than their crystalline forms because ____________.
In physisorption, adsorption is generally ____________.
Chromatography is based on the principle of ____________.
Which of the following is not a favourable condition for physical adsorption?
Why is it important to have clean surface in surface studies?
Why is chemisorption referred to as activated adsorption?
A plot of 10 g (x/m) versus 10 g p for the adsorption of a gas on the surface of a solid gives a straight line with slope equal to:-
Write three differences between physisorption and chemisorption.
