The effect of increasing the pressure on the equilibrium $2A + 3B \rightleftharpoons 3A + 2B$ is

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

The following reaction is known to occur in the body $CO_2 + H_2O \rightleftharpoons H_2CO_3 \rightleftharpoons H^{+} + HCO_3^-$. If $CO_2$ escapes from the system:

Sodium sulphate dissolves in water with the evolution of heat. Consider a saturated solution of sodium sulphate. If the temperature is raised,then according to Le Chatelier's principle:

In the $N_2 + 3H_2 \rightleftharpoons 2NH_3$ reversible reaction,an increase in pressure will favour:

$A$ vapor at atmospheric pressure is gradually heated from $25\,^oC$. Initially,its color deepens,but above $160\,^oC$,the color fades. At $600\,^oC$,the vapor becomes almost colorless. However,increasing the pressure at this temperature makes the color deep again. What is this vapor?