For the reaction ${\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)\rightleftharpoons 2{\mathrm{NH}}_3\left(\mathrm{g}\right),\mathrm{\Delta }H=-93.6\mathrm{kJ}{\mathrm{mol}}^{-1}$. Which of the following is not true?

Statement D  is not true

The formation of ${\mathrm{NH}}_3$ is increased at higher temperature

Ammonia is created through an exothermic reaction. So, a rise in temperature is not advantageous. The reaction will be helped by increasing the pressure and adding a catalyst. Gases of hydrogen and nitrogen serve as the reaction's starting ingredients.

Hence option D is correct