Paper: CSIR-NET June 2014 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Medium
The number of phases, components and degrees of freedom, when Ar is added to an equilibrium mixture of $\mathrm{NO}, \mathrm{O}_{2}$ and $\mathrm{NO}_{2}$ in gas phase are, respectively,
(a)1, 3, 5
(b)1, 4, 5
(c)1, 3, 4
(d)1, 4, 4
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
One gas phase; species NO, O₂, NO₂ linked by one equilibrium give 2 components, plus Ar = 3; F = C − P + 2 = 3 − 1 + 2 = 4.