Q107 · CSIR NET Chemistry, December 2014
Paper: CSIR NET December 2014 · Subject: Physical Chemistry · Chapter: Surface Chemistry · Topic: Surface Chemistry – General · Marks: 2 · Difficulty: Medium
Hydrogen is adsorbed on many metal surfaces by dissociation (S represents a surface site)- 
If the pressure of $\mathrm{H}_{2}(\mathrm{p})$ is small, the fraction of the surface covered by hydrogen is proportional to
If the pressure of $\mathrm{H}_{2}(\mathrm{p})$ is small, the fraction of the surface covered by hydrogen is proportional to(a)p
(b)$\mathrm{p}^{2}$
(c)$p^{1 / 2}$
(d)$p^{1 / 2}$
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Dissociative Langmuir: θ = (Kp)^½/[1 + (Kp)^½] ≈ (Kp)^½ at low pressure.
Study loop for Surface Chemistry