Redox Reactions...

Which of the following arrangements represent increasing oxidation number of the central atom?

Hydrogen atom in acidic medium is balanced by which of the following species?

The largest oxidation number exhibited by an element depends on its outer electronic configuration. With which of the following outer electronic configurations the element will exhibit largest oxidation number? 

In oxidation number method of chemical equation balance, an important parameter of an element to calculate is:

In which of the following compounds iron has lowest oxidation number?

Calculate the oxidation number of underlined element in the given compound.
$$K[\underline{Co}(C_2O_4)_2(NH_3)_2]$$

Oxidation number of bromine in sequence in $$Br_{ 3 }O_{ 3 }$$ is:

In which of the following conditions is the potential for the following half-cell reaction maximum?
$$2H^+ + 2e^{-} \longrightarrow H_2$$

$$2OH^- + 2OCN^- + 3OCl^- \rightarrow  2CO_3{2^-} + N_2 + 3Cl^- + H_2O$$
This is the balanced chemical equation of the reaction in which medium?

Hydrogen atom in the basic medium is balanced by which of the following species?