The effect of addition of helium gas to the following reaction in equilibrium state, is: \({\mathrm{PCI}}_{5}(\mathrm{g}…

the equilibrium will shift in the forward direction and more of \({\mathrm{Cl}}_{2}\) and \({\mathrm{PCl}}_{3}\) gases will be produced.

the equilibrium will go backward due to suppression of dissociation of \({\mathrm{PCl}}_{5}\).

helium will deactivate \({\mathrm{PCl}}_{5}\) and reaction will stop.

addition of helium will not affect the equilibrium.