An aqueous solution of hydrazine $\left(\mathrm{N}_{2} \mathrm{H}_{4}\right)$ is electrochemically o

Question

An aqueous solution of hydrazine $\left(\mathrm{N}_{2} \mathrm{H}_{4}ight)$ is electrochemically oxidized by $\mathrm{O}_{2}$, thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is $\mathrm{N}_{2(\mathrm{~g})}$.\ Choose the correct statement(s) about the above process.\

Professor PC Thomas Classes · Answer

(a,c)Atanode: $\mathrm{N}_{2} \mathrm{H}_{4}+4 \mathrm{OH}^{-} ightarrow \mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}+4 e^{-}$\ At cathode: $\mathrm{O}_{2}+2 \mathrm{H}_{2} \mathrm{O}+4 e^{-} ightarrow 4 \mathrm{OH}^{-}$\ Overall reaction: $\mathrm{N}_{2} \mathrm{H}_{4}+\mathrm{O}_{2} ightarrow \mathrm{~N}_{2}+2 \mathrm{H}_{2} \mathrm{O}$\ So, statements (a) and (c) are correct.\