JEE Main 2019 — Chemical Equilibrium Question with Solution

In option $\left(\mathrm{B}\right)-\mathrm{\Delta }{\mathrm{n}}_{\mathrm{g}}$ is $-$ve therefore, increase in pressure will bring reaction in forward direction.

In option $\left(\mathrm{C }\right)-$ as the reaction is exothermic therefore, increase in temperature will decrease the equilibrium constant.

In option $\left(\mathrm{D }\right)-$ Equilibrium constant changes only with temperature.

Hence, option $\left(\mathrm{B}\right),\mathrm{ }\left(\mathrm{C}\right)$ and $\left(\mathrm{D}\right)$ are correct. Therefore, option $\left(\mathrm{A}\right)$ is incorrect choice.