MCQ
Arrange the Carbocations in decreasing order of stability


- A$I > II > III$
- B$I > III > II$
- C$II > III > I$
- ✓$III > II > I$

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$(A)$ tert-butanol and $2$-methylpropan-$2$-ol
$(B)$ tert-butanol and $1$, $1$-dimethylethan-$1$-ol
$(C)$ $n$-butanol and butan-$1$-ol
$(D)$ isobutyl alcohol and $2$-methylpropan-$1$-ol
$MnO _{4}^{-}+8 H ^{+}+5 e ^{-} \rightarrow Mn ^{2+}+4 H _{2} O$,
$E^{o} _{ Mn ^{2+} / MnO _{4}^{-}}=-1.510 \,V$
$\frac{1}{2} O _{2}+2 H ^{+}+2 e ^{-} \rightarrow H _{2} O$,
$E _{ O _{2} / H _{2} O }^{o}=+1.223 \,V$
Will the permanganate ion, $MnO _{4}^{-}$liberate $O _{2}$ from water in the presence of an acid ?