In which of the reactions I have listed will decreasing the pressure cause more reactants to form?

Question

The reactions are:

PCl3(g) + Cl2(g) ↔ PCl5(g)

CO2(g) + H2(g) ↔ CO(g) + H2O(g)

H2(g) + Br2(g) ↔ 2HBr(g)

2NOCl(g) ↔ 2NO(g)+ Cl2(g)

TlCl3(s) ↔ TlCl(s) + Cl2(g)

Answer 1

Just the first one, because there are more gas moles on the left than the right.