| $A. S \rightarrow S^{-}$ | $P. \text{Endothermic process}$ |
| $B. N^{-} \rightarrow N$ | $Q. \text{Exothermic process}$ |
| $C. O^{-} \rightarrow O^{2-}$ | $R. \text{Inert gas configuration in product}$ |
| $D. P \rightarrow P^{-}$ | $S. \text{Half filled configuration in product}$ |
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| List-$I$ | List-$II$ |
| $i)$ Most reactive non-metal | $A$. $\Delta H_1=419, \Delta H_2=3051, \Delta_{Eg} H=-48$ |
| $ii)$ Most reactive metal | $B$. $\Delta H_1=1681, \Delta H_2=3374, \Delta_{Eg} H=-328$ |
| $iii)$ Least reactive element | $C$. $\Delta H_1=738, \Delta H_2=1451, \Delta_{Eg} H=-40$ |
| $iv)$ Metal forming binary halide | $D$. $\Delta H_1=3272, \Delta H_2=5251, \Delta_{Eg} H=+48$ |
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