The following reaction occurs in the blast furnace where iron ore is reduced to iron metal
$\text{Fe}_2\text{O}_{3(s)} + 3\text{CO}_{(g)} \rightleftharpoons \text{Fe}_{(\ell)} + 3\text{CO}_{2(g)}$
Using the Le-Chatelier’s principle, predict which one of the following will not disturb the equilibrium.
