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?

Potassium permanganate reacts with manganese dioxide in the presence of potassium hydroxide to give _____ and water. (Name the compound formed)

Identify the product $\mathrm{A}$ obtained when potassium dichromate reacts with concentrated heated sulphuric acid.

$2{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+8{\mathrm{H}}_2{\mathrm{SO}}_4\stackrel{ }{\to }2{\mathrm{K}}_2{\mathrm{SO}}_4+\mathrm{A}+8{\mathrm{H}}_2\mathrm{O}+3{\mathrm{O}}_2$

Identify the gas liberated, when potassium dichromate reacts with concentrated  heated sulphuric acid.

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

Give the chemical reaction of potassium hydroxide with ${\mathrm{KMnO}}_4$.

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

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, ${\mathrm{Na}}_2{\mathrm{SO}}_3$?

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

When acidified Potassium permanganate reacts with hydrogen sulphide, what will happen?