In which of the following equilibrium systems is the rate of the backward reaction favoured by an increase of pressure?

The equilibrium $Cr_2O_7^{2-} \rightleftharpoons 2CrO_4^{2-}$ shifts to the right in:

$H_2O_{(s)} \rightleftharpoons H_2O_{(\ell)}$
Which of the following statements are correct for the above reaction?
$(A)$ At $273 \ K$ and $1 \ atm$, $\Delta G = 0$ and $\Delta S > 0$.
$(B)$ On increasing pressure, more ice will melt.
$(C)$ On increasing pressure, the melting point of ice will decrease.
$(D)$ The melting point of ice increases on increasing pressure.

The equilibrium of the reaction $2A_{(s)} + 3B_{(g)} \rightleftharpoons 3C_{(g)} + D_{(g)} + Q$ is represented as shown. If the pressure on the system is reduced to half of its original value,then:

Which of the following will favour the reverse reaction in a chemical equilibrium?

The formation of $SO_3$ takes place according to the following reaction: $2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$; $\Delta H = -45.2 \ kcal$. The formation of $SO_3$ is favoured by: