For the reaction $Cr_2O_7^{2-} \xrightarrow{H^+} Cr^{3+}$,what is the equivalent weight of $Cr_2O_7^{2-}$?

Choose the correct option regarding the reaction $2KClO_3 \to 2KCl + 3O_2$.
$(1)$ $KClO_3$ undergoes both oxidation and reduction.
$(2)$ $Cl^{+5}$ is converted to $Cl^{-}$.
$(3)$ Oxygen in $KClO_3$ undergoes reduction.
$(4)$ This reaction cannot be called a redox reaction.

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

What is the value of $x$ in order to balance the following redox reaction?
$Mn_{(aq)}^{2+} + x ClO_{3_{(aq)}}^{-} \rightarrow MnO_{2_{(s)}} + x ClO_{2_{(aq)}}$

In the balanced reaction $x\,MnO_4^- + y\,H_2O \to 2Mn^{2+} + 5H_2O + 9O_2 + z\,e^-$,what are the values of $x$,$y$,and $z$?

The number of moles of $K_2Cr_2O_7$ reduced by $1 \ mol$ of $Sn^{+2}$ is: