MCQ
$P$ & $Q$ respectively is -


- A$DI-BALH$ followed by $H_2O$ and $Al(OCH_2CH_3)_3$
- B$LiAlH_4$ followed by $H_2O$ and

- ✓$DI-BALH$ followed by $H_2O$ and $m-CPBA$ followed by $C{H_3}OH/{H^ + }$
- DNone of these


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$(1)$ $\begin{matrix}
O \\
|| \\
{{C}_{6}}{{H}_{5}}-C-{{C}_{6}}{{H}_{5}} \\
\end{matrix}$
$(2)$ $C _{6} H _{5}- CHO$
$(3)$ $p - CH _{3}- C _{6} H _{4}- CHO$
$(4)$ $p - CH _{3} O - C _{6} H _{4}- CHO$
$A$. The chromate ion is square planar.
$B$. Dichromates are generally prepared from chromates.
$C$. The green manganate ion is diamagnetic.
$D$. Dark green coloured $\mathrm{K}_2 \mathrm{MnO}_4$ disproportionates in a neutral or acidic medium to give permanganate.
$E$. With increasing oxidation number of transition metal, ionic character of the oxides decreases.
Choose the correct answer from the options given below: