MCQ
$IUPAC$ name of the below compound is :
- A$5-$ methyl hexanol
- B$2-$ methyl hexanol
- C$2-$ methyl hex $-3-$ enol
- ✓$4-$ methyl pent $-2-$ en $-1-$ ol
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($A$) $\mathrm{C}_2^{2-}$ is expected to be diamagnetic
($B$) $\mathrm{O}_2{ }^{2+}$ is expected to have a longer bond length than $\mathrm{O}_2$
($C$) $\mathrm{N}_2^{+}$and $\mathrm{N}_2^{-}$have the same bond order
($D$) $\mathrm{He}_2^{+}$has the same energy as two isolated He atoms
$(R = 0.083\, L\, bar\, K^{-1} \,mol^{-1})$