Which of the following solutions will turn violet when a drop of lime juice is added to it?

When $KMnO_4$ acts as an oxidizing agent and ultimately forms $MnO_4^{2-}$,$MnO_2$,$Mn_2O_3$,and $Mn^{2+}$,what will be the number of electrons transferred in each case,respectively?

The reaction of aqueous $KMnO_4$ with $H_2O_2$ in acidic conditions gives

In the reaction $X^- + XO_3^- + H^+ \longrightarrow X_2 + H_2O$,the molar ratio in which $X^-$ and $XO_3^-$ react is:

For a redox reaction,how many moles of electrons will one mole of $MnO_4^-$ accept in an acidic medium?

In an experiment,$50 \ mL$ of $0.1 \ M$ solution of a metal salt reacted with $25 \ mL$ of $0.1 \ M$ solution of sodium sulphite. The half-equation for the oxidation of sulphite ion is $SO_3^{2-}{(aq)} + H_2O_{(l)} \to SO_4^{2-}{(aq)} + 2H^{+}{(aq)} + 2e^-$. If the oxidation number of the metal in the salt was $3$,what would be the new oxidation number of the metal?