Consider the gaseous equilibrium of, $\mathrm{H}_{2(g)}+\mathrm{I}_{2(g)} \rightleftharpoons 2 \math

Question

Consider the gaseous equilibrium of, $\mathrm{H}_{2(g)}+\mathrm{I}_{2(g)} \rightleftharpoons 2 \mathrm{HI}_{(g)}$
In the following graphs the three gases are at equilibrium in a container. At some time $t$, extra $\mathrm{I}_2$ is added. Which of the following sets will respond to this solution?

Professor PC Thomas Classes · Answer

(b) : $\mathrm{H}_{2(g)}+\mathrm{I}_{2(g)} \rightleftharpoons 2 \mathrm{HI}_{(g)}$
When extra $\mathrm{I}_2$ is added, equilibrium shifts in forward direction. Thus, pressure of HI increases and that of $\mathrm{H}_2$ and $\mathrm{I}_2$ decreases.