Question
What happens when calcium ethanoate is dry distilled?

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| $[N_2O_5](M)$ | Time $(min)$ |
| $0.400$ | $0.00$ |
| $0.289$ | $20.0$ |
| $0.209$ | $40.0$ |
| $0.151$ | $60.0$ |
| $0.109$ | $80.0$ |

| Column $I$ | Column $II$ | ||
| $(i)$ | $S_N1$ reaction | $(a)$ | vic$-$dibromides |
| $(ii)$ | Chemicals in fire extinguisher | $(b)$ | gem$-$dihalides |
| $(iii)$ | Bromination of alkenes | $(c)$ | Racemisation |
| $(iv)$ | Alkylidene halides | $(d)$ | Saytzeff rule |
| $(v)$ | Elimination of $\ce{HX}$ from alkylhalide | $(e)$ | Chlorobromocarbons |