Redox Reactions...

The oxidation number of phosphorous in $$P{ O }_{ 4 }^{ 3- },\  { P }_{ 4 }{ O }_{ 10 }$$ and $${ P }_{ 2 }{ O }_{ 7 }^{ 4- }$$ is :

The change in the oxidation number of the underlined nitrogen atom in the following chemical reactions are :
a.  Nitrous acid $$\left( H\underline { N } { O }_{ 2 } \right)$$ reduces $$Mn{ O }_{ 4 }^{ \ominus  }$$ in acid solution.
b.  Nitrous acid $$\left( H\underline { N } { O }_{ 2 } \right)$$ oxidises $${ I }^{ \ominus  }$$ to $${ I }_{ 2 }$$ in acid solution.

When $$kMnO_4$$ acts as an oxidising agent and ultimately forms $$MnO^{2-}_4,\  MnO_2,\, Mn_2O_3,$$ $$\, $$and$$\, Mn^{2+}$$, determine the number of electrons transferred in each case.

The oxidation state of manganese in $${K}_{2}Mn{O}_{4}$$ is:

The oxidation number of sulphur in $${H}_{2}{SO}_{4}$$ is :

Oxidation number of $$S$$ in $${S_2O_3}^{2-}$$ is:

Which of the following does not represent redox reaction?

Determine oxidation number of iron in $$Na_2[Fe(CN)_5(NO)]$$.

Determine the oxidation state of Cr in $$[Cr(NH_3)_4Cl_2]Cl$$

In $$\displaystyle HCN$$ oxidation number of carbon is?