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प्रश्न
Give reason why a finely divided substance is more effective as an adsorbent.
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उत्तर
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.
संबंधित प्रश्न
Why is adsorption always exothermic?
Write any two characteristics of chemisorption.
Why are powdered substances more effective adsorbents than their crystalline forms?
Physisorption is reversible while chemisorption is irreversible. Why ?
How does chemisorption vary with temperature?
Answer in one sentence:
Name type of adsorption in which vander Waals focres are present.
Which of the following compounds is formed when tungsten adsorbs oxygen gas?
Which among the following is a property of physisorption?
The extent of adsorption increases with the ____________.
Extent of physisorption of a gas increases with ______.
In physisorption adsorbent does not show specificity for any particular gas because ______.
In which of the following reactions heterogenous catalysis is involved?
(a) \[\ce{2SO2 (g) + O2 (g) ->[NO(g)] 2SO3 (g)}\]
(b) \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\]
(c) \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\]
(d) \[\ce{CH3COOCH3 (l) + H2O (l) ->[HCI(l)] CH3COOH (aq) + CH3OH (aq)}\]
Why do physisorption and chemisorption behave differently with rise in temperature?
Rate of physisorption increase with:-
Write three differences between physisorption and chemisorption.
