MCQ
find out the reactivity order with $LiAlH_4$


- A$A > B > C > D$
- ✓$B > C > D > A$
- C$D > C > B > A$
- D$B > D > C > A$

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[Given : Molar mass of $A =93\, g\, mol ^{-1}$. Molal depression constant of water is $1.86\, K \,kg\, mol ^{-1}$ ]

Reason : Actual structure of benzene is a hybrid of following two structures.
$\begin{array}{*{20}{c}}
{C{H_2} = CHC{H_2}CHC{H_3} + KOH\xrightarrow[{heat}]{{{\text{alcohol}}}}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$