Question

$N_2{O}_4\rightleftharpoons 2N{O}_3,K_C=4$. This reversible reaction is studied graphically as shown in figure. Select the correct statements out of I, II and III.
I: Reaction quotient has maximum value at point $A$
II: Reaction proceeds left to right at a point when $\left[N_2{O}_4\right]=\left[N{O}_2\right]=0.1M$
III: $K_c=Q$ when a point $D$ or $F$ is reached.

• A. I, II
• B. II, III
• C. I, III
• D. I, II, III

Answer 1

The correct option is B II, III

I is incorrect as Q is maximum at where product is maximum.

$IIa=\frac{{\left(0.1\right)}^2}{0.1}\Rightarrow \frac{{10}^{-2}}{{10}^{-1}}\Rightarrow {10}^{-1}\Rightarrow 0.1<K_{C}soyeslefttorightmotion.$

$III{K}_C=Q$ at because D and F represent equilibrium Reaction

II and III correct

Option B is correct.