Question

The correct ascending order of adsorption of the following gases on the same mass of charcoal at same temperature and pressure is
(a) CH4 < H2 < SO2
(b) H2 < CH4 < SO2
(c) SO2 < CH4 < H2
(d) H2 < SO2 < CH4

Answer 1

Answer:

H2 4.7 cc per gm

CH4 16.2 cc per gm

CO2 48 cc per gm

NH3 181 cc per gm.

NH3>CO2>CH4>H2

Answer 2

The order of adsorption will be $H_{2} < CH_{4} < SO_{2}$. (Option b)

• Adsorption is expressed as a surface occurrence where particles are attached to the top layer of material. It usually involves the molecules or  atoms of a gas, liquid or solid in a soluble state that is attached to the surface.
• Adsorption is a consequence of surface energy. Usually, the surface particles that can be exposed partly tend to attract other particles to their site. It is present in a lot of physical, natural, biological and chemical systems and has its uses in many industrial applications
• It is a process that includes the accumulation of a substance in molecular species in greater concentrations on the surface. Meanwhile, adsorption is different from absorption. The two processes involve completely different mechanisms.
• The more the critical temperature of a gas, the higher the amount of gas adsorbed. Therefore, the order of adsorption will be $H_{2} < CH_{4} < SO_{2}$.

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