In the equilibrium $Ice \rightleftharpoons Water$,what happens when pressure is increased?

The reaction $SO_2 + Cl_2 \rightleftharpoons SO_2Cl_2$ is exothermic. If some $SO_2$ is added to the equilibrium mixture at constant volume,then ...........

When pressure is applied to the system $Ice \rightleftharpoons Water$,what will happen?

Which reaction is not affected by a change in pressure?

For the reaction $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$,at constant temperature,the reaction proceeds in the forward direction by:

The gas phase reaction $2NO_{2(g)} \rightleftharpoons N_2O_{4(g)}$ is an exothermic reaction. The decomposition of $N_2O_4$ in an equilibrium mixture of $NO_{2(g)}$ and $N_2O_{4(g)}$ can be increased by: