For the balanced equation $NO_2^- + H_2O \to NO_3^- + 2H^+ + ne^-$,the value of $n$ is .......

Consider the reaction of water with $F_2$ and suggest in terms of oxidation and reduction,which species are oxidized and reduced.

The number of moles of sodium sulphite $(Na_2SO_3)$ needed to react with one mole of $KMnO_4$ in acidic solution is:

Write the balanced chemical equation for the following reaction using the oxidation number method:
Reaction of liquid hydrazine $(N_2H_4)$ with chlorate ion $(ClO_3^-)$ in basic medium produces nitric oxide gas $(NO)$ and chloride ion $(Cl^-)$.

Consider the following reaction occurring in basic medium $2MnO_4^- (aq) + Br^- (aq) \to 2MnO_2 (s) + BrO_3^- (aq)$. How can the above reaction be balanced further?

Assign $A, B, C, D$ from the given type of reaction:
$5CO(g) + I_2O_5(s) \longrightarrow 5CO_2(g) + I_2(s)$