Q51 · CSIR NET Chemistry, December 2019
Paper: CSIR NET December 2019 · Subject: Physical Chemistry · Chapter: Surface Chemistry · Topic: Catalysis Surface · Marks: 2 · Difficulty: Hard
The order of a surface catalyzed unimolecular reaction, at very low and very high pressures of the reactant, would be, respectively
(a)0,0
(b)1,0
(c)0,1
(d)1,1
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Langmuir–Hinshelwood unimolecular: rate ∝ θ = Kp/(1+Kp) — first order at low p, zero order at high p (b).
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