MCQ

- ✓Piperidine $>$ Pyridine $>$ Pyrrole
- BPyrrole $>$ Pyridine $>$ Piperidine
- CPyridine $>$ Piperidine $>$ Pyrrole
- DPyrrole $>$ Piperidine $>$ Pyridine

$\mathrm{N}\left(\mathrm{sp}^3\right.$, localized lone pair $)>\mathrm{N}\left(\mathrm{sp}^2\right.$, localized lone
pair $)>\mathrm{N}\left(\mathrm{sp}^2\right.$, delocalized lone pair, aromatic)
$\therefore$ Piperidine $>$ Pyridine $>$ Pyrrole
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If the oxidation number of metal in the salt was $3$, what would be the new oxidation number of metal ?

$I.$ ${C_2}{H_4}$ $II.$ ${C_2}{H_2}$
$III.$ ${C_6}{H_6}$ $IV.$ ${C_2}{H_6}$