In which of the following systems, doubling the volume of the container causes a shift to right?
A H₂(g)+I₂(g)⇋2HI(g)
B 2CO(g)+O₂(g)⇋2CO₂(g)
C N₂(g)+3H₂(g)⇋2NH₃(g)
D PCl₅(g)⇋PCl₃(g)+Cl₂(g)