Critical temperature of N2,COandCH4 are 126, 134 and 190 K respectivley. The increasing order of adsorption on the surface of activated charcoal is:
A
N2<CH4<CO
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
N2<CO<CH4
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
CH4<CO<N2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
CO<N2<CH4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is BN2<CO<CH4 Critical temperature of a substance is the temperature at and above which vapour of the substance cannot be liquefied, no matter how much pressure is applied.
Gases having higher critical temperature are easily liquefied as van der Waals' forces are stronger near the critical temperatures (TC).
Hence, they have greater force of attraction with the charcoal and therefore they are more easily adsorbed on the surface of the charcoal.
Adsorption of gas on the surface of activated charcoal depends on the critical temperature of the gas. Critical temperature has a direct relation to adsorption - Higher the critical temperature, greater will be the adsorption.
Therefore, the order of adsorption is N2<CO<CH4