Question

7. Which of the following does not affect the adsorbing
power of adsorbent?
(1) Porous nature
(2) Residual valencies
(3) Large surface area (4) High lattice energy​

Answer 1

Answer:

2 ) residual valenices

Explanation:

Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid, or dissolved solid to a surface.

Adsorption of gases on solids depends on the following factors:

1) Surface area of the adsorbent: Adsorption is surface phenomenon. The extent of adsorption is directly proportional to the surface area of adsorbent. Finely divided metals and porous solids like charcoal, silica gel etc. posses more surface area when compared with solid lumps.

2) Effect of pressure: Extent of adsorption increases with an increase in equilibrium pressure.

3) Nature of the gas: Since physical adsorption is non-specific, every gas gets adsorbed on the surface of any solid. Under a given conditions of temperature and pressure, the easily liquefiable gases such as NH

3

,HCl and SO

2

are adsorbed more than the gases like H

2

,N

2

and CO. The ease with which a gas can be liquefied is determined by its critical temperature, T

c

.

Polishing the surface of the solid adsorbent makes no effect on adsorption.

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