MCQ
Pick out the incorrect statement :
  • A
    $MnO_4^{2-}$ is quite strongly oxidizing and stable only in very strong alkalies. In dilute alkali, neutral solutions, it disproportionates.
  • B
    In acidic solutions, $MnO_4^{2-}$ is reduced to $Mn^{2+}$ and thus, $KMnO_4$ is widely used as oxidising agent
  • $KMnO_4$ does not acts as oxidising agent in alkaline medium
  • D
    $KMnO_4$ is manufactured by the fusion of pyrolusite ore with $KOH$ in presence of air or $KNO_3,$ followed by electrolytic oxidation in alkaline solution.

Answer

Correct option: C.
$KMnO_4$ does not acts as oxidising agent in alkaline medium
c

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is true for the equilibrium reaction ?

$\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C-OH+C{{H}_{3}}-OH\overset{cat.}{\longleftrightarrow}  \\
\end{matrix}\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C-O-C{{H}_{3}}+{{H}_{2}}O  \\
\end{matrix}$

Purine derivative among the following bases is
Efficiency of the following cell is $84\%$ . $A\left( s \right) + {B^{2 + }}(aq.) \rightleftharpoons {A^{2 + }}(aq.) + B(s)$ ;  $\Delta {H^o} =  - 285\,kJ$ . Then the standard $EMF$ of the cell will be ........... $\mathrm{V}$
An elements is in ${M^{3 + }}$ form. Its electronic configuration is $[Ar]3{d^1}$ the ion is
For the transformation the reagent used is
In ${K_4}[Fe{\left( {CN} \right)_6}]$
A solution containing $10\,g$ per $dm^3$ of urea (molecular mass $= 60\,g\,mol^{-1}$ ) is isotonic with a $5\%$ solution of a non volatile solute. The molecular mass of this non volatile solute is  ........ $g\,mol^{-1}$
Ethylene may be obtained by dehydration of which of the following with concentrated ${H_2}S{O_4}$ at $ 160 -170\,^o C$
In the following reaction sequence, the correct structure($s$) of $X$ is (are)

(image)

Which of the following is not  expected to be intermediate of the following reaction ?