Advertisements
Advertisements
Question
Why are powdered substances more effective adsorbents than their crystalline forms?
Advertisements
Solution
Powdered substances are more effective adsorbents than their crystalline forms because when a substance is powdered, its surface area increases and physisorption is directly proportional to the surface area of the adsorbent
RELATED QUESTIONS
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
Differentiate between adsorbtion and absorption.
What is the effect of temperature on chemisorption ?
Distinguish between the meaning of the terms adsorption and absorption. Give one example of.
What is the difference between physisorption and chemisorption?
Give reason why a finely divided substance is more effective as an adsorbent.
Discuss the effect of temperature on the adsorption of gases on solids.
Write one similarity between Physisorption and Chemisorption
How does chemisorption vary with temperature?
Answer in one sentence:
Name type of adsorption in which vander Waals focres are present.
Chromatography is based on the principle of ____________.
Extent of physisorption of a gas increases with ______.
In physisorption adsorbent does not show specificity for any particular gas because ______.
Why is it important to have clean surface in surface studies?
Why do physisorption and chemisorption behave differently with rise in temperature?
Assertion: Detergents with low CMC are more economical to use.
Reason: Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC.
Which among the following is a false statement?
In physical adsorption, gas molecules are bound on the solid surface by
Adsorption play no role in:-
