List of top Chemistry Questions on Law Of Chemical Equilibrium And Equilibrium Constant asked in IIT JAM CY

For the reaction: \[ N_2O_3(g) \rightarrow NO(g) + NO_2(g) \] If the degree of dissociation is $\alpha = 0.2$, find $\Delta n_g$ and total number of moles at equilibrium (starting with 1 mole).