Hydrogen peroxide acts both as an oxidising and as a reducing age… - Vidyadip

MCQ

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species . In which of the following cases $H_2O_2$ acts as a reducing agent in acid medium?

✓
$MnO_4^-$
B
$Cr_2O_7^{2-}$
C
$SO_3^{2-}$
D
$KI$

✓

Answer

Correct option: A.

$MnO_4^-$

a
$H_2O_2$ acts as a reducing agent only in presence of strong oxidising agents ($i.e.,MnO_4^-$ ) in acidic as well as alkaline medium. $2KMnO_4 + 3H_2SO_4 + 5H_2O_2 \to K_2SO_4 + 2MnSO_4 + 8H_2O + 5O_2$

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

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The complex $[Pt{(N{H_3})_6}]C{l_4}$ furnishes ....... ions

Among the following which one has the highest cation to anion size ratio ?

For the following reaction in gaseous phase $CO\left( g \right) + \frac{1}{2}{O_2}\left( g \right) \to C{O_2}\left( g \right),{K_p}/{K_c}$ is

Methyl group attached to benzene can be oxidised to carboxyl group by reacting with

A gaseous mixture contains $C{H_4}$ and ${C_2}{H_6} $ in equimolecular proportion. The weight of $2.24$ litres of this mixture at $NTP$ is ............ $\mathrm{g}$

Which of the following reactions takes place when a mixture of concentrated $HN{O_3}$ and ${H_2}S{O_4}$ reacts on benzene at $350\,K$

The equilibrium constants of the following are

$N_2 + 3H_2 \rightleftharpoons 2NH_3 \,;$ $K_1$

$N_2 + O_2 \rightleftharpoons 2NO\,;$ $K_2$

$H_2 + 2 O_2 \rightleftharpoons H_2O\,;$ $K_3$

The equilibrium constant $(K)$ of the reaction :

$2NH_3 + \frac{5}{2} \overset K \leftrightarrows 2NO + 3H_2O$

Three complexes, $[CoCl(NH_3)_5]^{2+}\, (I)$, $[Co(NH_3)_5H_2O]^{3+}\, (II)$ and $[Co(NH_3)_6]^{3+}\, (III)$ Absorb light in the visible region. The correct order of the wavelength of light absorbed by them is

Liquids $A$ and $B$ form ideal solution for all compositions of $A$ and $B$ at $25^{\circ} C$. Two such solutions with $0.25$ and $0.50$ mole fractions of $A$ have the total vapor pressures of $0.3$ and $0.4$ bar, respectively. What is the vapor pressure of pure liquid $B$ in bar?