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?

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.

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

What is the melting point of potassium dichromate?

 Potassium dichromate is a yellow crystalline solid.

$\underset{\mathrm{Potassium} \mathrm{permanganate}}{2{\mathrm{KMnO}}_4}+3{\mathrm{H}}_2{\mathrm{SO}}_4+\underset{\mathrm{Hydrogen} \mathrm{sulphide}}{5{\mathrm{H}}_2\mathrm{S}} \to 2{\mathrm{MnSO}}_4+{\mathrm{K}}_2{\mathrm{SO}}_4+$ _____ $+8{\mathrm{H}}_2\mathrm{O}$

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

How many peroxy linkages are present in $Cr{O}_5$ ?

Treatment of alkaline ${\mathrm{KMnO}}_4$ solution with $\mathrm{KI}$ solution oxidizes iodide to:-

$$\begin{gathered} 2{\mathrm{MnO}}_2 + 4\mathrm{KOH} + {\mathrm{O}}_2 \to \_\_\_\_\_+ 2{\mathrm{H}}_2\mathrm{O} \\ 3{\mathrm{MnO}}_4^{2-} + 4{\mathrm{H}}^{+} \to 2{\mathrm{MnO}}_4^{-} +\_\_\_\_\_ + 2{\mathrm{H}}_2\mathrm{O} \end{gathered}$$
The above reactions give us permanganate ion from potassium oxide. The no. of manganese dioxide in the product side for both the reactions are:

Which of the following is/are correct uses of ${\mathrm{KMnO}}_4$.

During oxidation of ferrous sulphate using mixture of dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$ and potassium dichromate, oxidation state of chromium changes from

Write the balanced equation of the reaction of oxidising Nitrite ion to Nitrate in the presence of acidified potassium dichromate.