Advertisements
Advertisements
Question
Give reason why a finely divided substance is more effective as an adsorbent.
Advertisements
Solution
Adsorption is a surface phenomenon. Therefore, adsorption is directly proportional to the surface area. A finely divided substance has a large surface area. Both physisorption and chemisorption increase with an increase in the surface area. Hence, a finely divided substance behaves as a beneficial adsorbent.
RELATED QUESTIONS
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Write any two characteristics of chemisorption.
What is the difference between physisorption and chemisorption?
Give reasons for the following observations :
Powdered substances are more effective adsorbents.
Adsorption increases when ____________.
Chromatography is based on the principle of ____________.
Which of the following is not a favourable condition for physical adsorption?
In physisorption adsorbent does not show specificity for any particular gas because ______.
Why is chemisorption referred to as activated adsorption?
Give an example where physisorption changes to chemisorption with rise in temperature. Explain the reason for change.
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
Rate of physisorption increase with:-
Chromatography is based on:-
Adsorption play no role in:-
Assertion A : Activated charcoal adsorbs SO2 more efficiently than CH4.
Reason R : Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In light of the above statements, choose the correct answer from the options given below.
