In neutral medium,potassium permanganate oxidises $I^{-}$ to $X$. Identify $X$.

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

How many moles of electrons are needed to convert one mole of nitrate ion to hydrazine?

Write the balanced chemical equation for the following reaction:
$Cl_2O_7$ in the gaseous state combines with an aqueous solution of hydrogen peroxide $(H_2O_2)$ in an acidic medium to give chlorite ion $(ClO_2^-)$ and oxygen gas $(O_2)$. (Balance by the ion-electron method)

The number of electrons required to reduce chromium completely in $Cr_2O_7^{2-}$ to $Cr^{3+}$ in acidic medium is:

The number of moles of $KMnO_4$ that will be needed to react completely with one mole of ferrous oxalate $FeC_2O_4$ in acidic solution is