Match the column I with column II and mark the appropriate choice.

| Column I | Column II |
|---|---|
| (p) $H_2(g) + Br_2(g) \rightarrow 2HBr(g)$ | (i) $\Delta H = \Delta U - 2RT$ |
| (q) $PCl_5(g) \rightarrow PCl_3(g) + Cl_2(g)$ | (ii) $\Delta H = \Delta U + 3RT$ |
| (r) $N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$ | (iii) $\Delta H = \Delta U$ |
| (s) $2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)$ | (iv) $\Delta H = \Delta U + RT$ |