Redox Reactions...

Oxidation number of three elements $$A,\ B$$ and $$C$$ are $$+2, +3$$ and $$-2$$ respectively. What is the formula of the compound formed from these three elements?

Calculate the Oxidation number of $$Co$$ in the compound:
$$\left[ Co{ \left( { C }_{ 2 }{ O }_{ 4 } \right)  }_{ 2 }{ \left( { NH }_{ 3 } \right)  }_{ 2 } \right] $$

Oxidation number of $$Cr$$ in $$CrO_5$$ is:

The sum of oxidation states of sulphur in $$H_2S_2O_8$$ is?

Among the following, identify the species with an atom in $$+6$$ oxidation state.

Oxygen exhibit $$-1$$ oxidation state in:

In the case of $$CH_3COOH$$, the oxidation number of carbon of the carboxylic group is:

Which one of the following statements is not correct?

The oxidation states of Cr in $$\left[ Cr\left( { H }_{ 2 }O \right)  \right] { Cl }_{ 3 },\left[ { Cr\left( { C }_{ 6 }{ H }_{ 6 } \right)  }_{ 2 } \right] ,$$ and $${ K }_{ 2 }\left[ Cr{ \left( CN \right)  }_{ 2 }{ \left( O \right)  }_{ 2 }{ \left( O \right)  }_{ 2 }\left( { NH }_{ 3 } \right)  \right] $$ respectively are :

Calculate the Oxidation number of $$Fe$$ in the compound.
$$\left[ Fe\left( { No } \right) { ({ H }_{ 2 }O )}_{ 5 } \right] { SO }_{ 4 }$$