For the reaction ${\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\rightleftharpoons 2\mathrm{NO}\left(\mathrm{g}\right),\mathrm{\Delta }H=180\mathrm{kJ}{\mathrm{mol}}^{-1}$. Which of the following is not true?

$\mathrm{\Delta }H$ positive means the forward direction is the endothermic direction. Increase in temperature would cause the equilibrium to shift in the endothermic direction, i.e. the formation of NO is increased at higher temperature. Pressure changes do not affect equilibrium. Volume changes do not affect equilibrium as $\mathrm{\Delta }{\nu }_{\mathrm{g}}=0$.