The oxidation number of Cr in $[Cr(NH_3)_4Cl_2]Cl$ is:

The oxidation state of central bromine atom in $B{r_3}{O_8}$ is

The oxidation number of Cr in $[Cr(NH_3)_4Cl_2]Cl$ is:

In which of the following $N$ has lowest oxidation number?

Reaction of acidified ${\rm{KMn}}{{\rm{O}}_4}$ with ferrous oxalate gives oxidation products containing :

Which reaction involves neither oxidation nor reduction?

In the complex ion $[Co(NH_3)_4Cl_2]^+$, the oxidation number of cobalt and the coordination number of the complex are respectively:

Oxidation number of Carbon in ${{\bf{H}}_{\bf{2}}}{{\bf{C}}_{\bf{2}}}{{\bf{O}}_{\bf{4}}}$ is

Sulphur Containing species that cannot be a reducing agent is

Oxidation number of N in NOCl is :

Carbon is in the lowest oxidation state in