Ncert Exercises & Solutions

H₂ gas is adsorbed on activated charcoal to a very little extent in comparison to easily liquefiable gases due to -

a. Very strong van der Waals’ interaction

b. Very weak van der Waals’ forces

c. Very low critical temperature

d. Very high critical temperature

The correct choice among the given is -

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: If force of attraction between adsorbent and adsorbate is low then extent of adsorption is less

H₂ gas is adsorbed on activated charcoal to a very little extent in comparison to easily liquefiable gases due to

(i) Very low van der Waals’ forces and

(ii) Very low critical temperature equal to 33 K.