MCQ
Manganese achieves its highest oxidation state in its compound
- A$Mn{O_3}$
- B$M{n_3}{O_4}$
- ✓$KMn{O_4}$
- D${K_2}Mn{O_4}$
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(Given that $K_f = 5\,K\, kg\,mol^{-1},$ Molar mass of benzoic acid $= 122\,g\,mol^{-1}$ )

$\begin{array}{*{20}{c}}
O \\
{||} \\
{{C_6}{H_5} - C - C{H_3}}
\end{array}\mathop {\xrightarrow{{(i)\,B{r_2}/KOH}}}\limits_{(ii)\,{H^ \oplus }} CHB{r_3} + [X]$
$[X]$ will be :