Decolourisation of acidified potassium permanganate occurs when ${{\rm{H}}_2}{{\rm{O}}_2}$ is added to it. This is due to:

Reduction of ${\rm{KMn}}{{\rm{O}}_4}$

Oxidation of ${\rm{KMn}}{{\rm{O}}_4}$

Both oxidation and reduction of ${\rm{KMn}}{{\rm{O}}_4}$

NEET UG CHEMISTRY MCQ: HYDROGEN

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Decolourisation of acidified potassium permanganate occurs when

{\mathrm{H}_2}{\mathrm{O}_2}

is added to it. This is due to:

View answer and explanation

Correct option: B

Reduction of

\mathrm{KMn}{\mathrm{O}_4}

Option B (Reduction of

\mathrm{KMn}{\mathrm{O}_4}

) is correct because

{\mathrm{H}_2}{\mathrm{O}_2}

acts as a reducing agent, reducing

Mn^{7+}

KMnO_4

Mn^{2+}

, which is colorless.

Practice All Chapter MCQs →

\mathrm{CaC}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_2+' \mathrm{X}\,'

\mathrm{Mg}_2 \mathrm{C}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Mg}(\mathrm{OH})_2+'\mathrm{Y}\,'

\mathrm{X}

\mathrm{Y}

{H_2}{O_2} \to 2{H^ + } + {O_2} + 2{e^ - };{E^0} = - 0.68V

{\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}

{\mathrm{H}_2}{\mathrm{O}_2}

{SiH}_4

AlH_3

{NH}_3