Under which of the following conditions of temperature and pressure will molecular hydrogen $(H_2)$ dissociate into atomic hydrogen $(H)$?

Observe the following equilibrium at $T(K)$:
$H_{2(g)} + I_{2(g)} \rightleftharpoons 2HI_{(g)}$
Which one of the following does not disturb the above equilibrium?

According to Le Chatelier's principle,which of the following factors influence a chemical system?

For the reaction $N_2 + 3H_2 \rightleftharpoons 2NH_3 + 21.9 \, kcal$,under which conditions is the production of ammonia favored according to Le Chatelier's principle?

At $25\,^oC$,the equilibrium $SO_2Cl_2(g) \rightleftharpoons SO_2(g) + Cl_2(g)$ is established in a closed vessel. When $Cl_2$ is added to the equilibrium mixture,which of the following statements is/are correct for the system?
$(1)$ Change in concentrations of $SO_2$,$Cl_2$,and $SO_2Cl_2$.
$(2)$ More $Cl_2$ is produced.
$(3)$ The concentration of $SO_2$ decreases and the concentration of $SO_2Cl_2$ increases.

For which of the following reactions is product formation favoured at low pressure and low temperature?