MCQ
The $C - H$ bond distance is the longest in
- A${C_2}{H_2}$
- B${C_2}{H_4}$
- ✓${C_2}{H_4}B{r_2}$
- D${C_6}{H_6}$
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| List $I$ Isomeric pairs | List $II$ Type of isomers |
| $A$ Propanamine and $N-$Methylethanamine | $I$ Metamers |
| $B$ Hexan$-2-$one and Hexan$-3-$one | $II$ Positional isomers |
| $C$ Ethanamide and Hydroxyethanimine | $III$ Functional isomers |
| $D$ $o-$nitrophenol and $p-$nitrophenol | $IV$ Tautomers |
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