Some Important Compounds of Transition Metals

On oxidation of ${\mathrm{S}}_{\mathrm{2}}{\mathrm{O}}_3^{2-}$ by ${\mathrm{MnO}}_4^{-}$  in neutral aqueous medium, the oxidation number of S would change from:

The number of moles of ${\mathrm{KMnO}}_4$ that will be needed to react with one mole of sulphite ion in acidic solution is:

The following steps are involved in the manufacturing of potassium dichromate:

What is the difference in the oxidation number of $\mathrm{Cr}$ between X and Y?

Identify the products obtained, when potassium permanganate is heated to $473 \mathrm{K}$.

Give the oxidation reaction of $\mathrm{HCl}$ by ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ in acidic medium.

Explain the heating effect on ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$.

What happens to potassium permanganate, when heated to $473 \mathrm{K}$?

Explain the reaction of potassium dichromate with concentrated heated sulphuric acid.

Complete the following:

Write the action of hot concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ on ${\mathrm{KMnO}}_4$.

Which oxide is formed by the action of cold concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ on ${\mathrm{KMnO}}_4$.

Write the action of cold concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ on ${\mathrm{KMnO}}_4$.

What is the number of moles of ${\mathrm{KMnO}}_4$ that will be needed to react with one mole of sulphite ions in acidic solution?

What would occur in the reaction between potassium permanganate, ${\mathrm{KMnO}}_4$ and sodium sulphite, ${\mathrm{Na}}_2{\mathrm{SO}}_3$?

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

When thiosulphate ion is oxidized by iodine, the new product X is formed. How many S-S linkage is/are present in X?

Balance the given chemical equation.

$\underset{}{{\mathrm{KMnO}}_4} + {\mathrm{H}}_2\mathrm{O} \to \mathrm{KOH} +\underset{}{ {\mathrm{MnO}}_2} +\left[\mathrm{O}\right]$

Which of the following species has oxygen in $-1$ oxidation state?