Question

Among CO NH3 H2 and NCl3 which gas is most absorbed by charcoal

Answer 1

co absorbed by charcoal

Answer 2

The correct answer could be - NH₃ and H₂.

Charcoal is another form of carbon. The adsorption of substances or gases on charcoal is affected by the temperature at which the physisorption takes place.

Gases like N₂ and H₂ have high adsorption towards the surface of charcoal at low temperatures. As the temperatures increase, the physisorption decreases.

NH₃ has a comparatively stronger interaction with charcoal as it has a higher critical temperature. Since the adsorption will be high at higher critical temperatures (Tc), the adsorption with NH₃ will be more.

Also, as the surface area of the charcoal is increased, the rate of physisorption increases.