When thiosulphate ion is oxidised by iodine,which one of the following ions is produced?

In the ionic equation $BiO_{3}^{-} + 6H^{+} + x e^{-} \longrightarrow Bi^{3+} + 3H_{2}O$,the value of $x$ is:

True or False: In the reaction $Cr_2O_7^{2-} \xrightarrow{H^{+}} Cr^{3+}$,the equivalent mass of $Cr_2O_7^{2-}$ is $\frac{\text{molecular mass}}{6}$.

When $CrI_3$ oxidises to $Cr_2O_7^{2-}$ and $IO_4^-$,the equivalent mass of $CrI_3$ will be :-

$KMnO_4$ acts as an oxidising agent in acidic medium. The number of moles of $KMnO_4$ that will be needed to react with one mole of sulphide ion $(S^{2-})$ in acidic solution is . . . . . . (in $/5$)?

In the following reaction $yMnO_4^- + xH^{+} + C_2O_4^{2-} \to yMn^{2+} + 2CO_2 + \frac{x}{2}H_2O$,the values of $x$ and $y$ are: