Redox Reactions...

Oxidation state of central atom in $$Ni(CN)_{4}^{2-}$$ is :

What is the oxidation number of chlorine in $$ClO_{3}^{-}$$?

The number of moles of $$K_{2}Cr_{2}O_{7}$$ that will be needed to react with one mole of $$H_{2}S$$ in acidic medium is :

Oxidation number of S in $$H_{2}SO_{5}$$ is 6. This is observed because:

In the reaction of $$HI$$ with $$H_2SO_4$$ the oxidation state of sulphur is changed to -2. Identify the correct balanced equation.

Oxidation number of $$P$$ in $$PO^{3-}_4$$, of $$S$$ in $$SO^{2-}_4$$ and that of $$Cr$$ in $$Cr_2O^{2-}_7$$ are respectively:

Oxidation states of P in $$H_{4}P_{2}O_{5},H_{4}P_{2}O_{6},H_{4}P_{2}O_{7},$$ are respectively:

Which of the following can act as both oxidizing and reducing agent?

Oxidation state of Nitrogen in Nitrogen dioxide is:

The stability of $$+1$$ oxidation state increases in the sequence: