JEE PYQ: Chemical Equilibrium Question 22
Question 22 - 2019 (12 Apr Shift 2)
In which one of the following equilibria, $K_p \neq K_c$?
(1) $2\text{C}(s) + \text{O}_2(g) \rightleftharpoons 2\text{CO}(g)$
(2) $2\text{HI}(g) \rightleftharpoons \text{H}_2(g) + \text{I}_2(g)$
(3) $\text{NO}_2(g) + \text{SO}_2(g) \rightleftharpoons \text{NO}(g) + \text{SO}_3(g)$
(4) $2\text{NO}(g) \rightleftharpoons \text{N}_2(g) + \text{O}_2(g)$
Show Answer
Answer: (1) $2\text{C}(s) + \text{O}_2(g) \rightleftharpoons 2\text{CO}(g)$
Solution
$\Delta n_g = 2 - 1 = +1 \neq 0$, so $K_p \neq K_c$.