- A

- B

- ✓

- D






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$(A)$ $\mathrm{NH}_4 \mathrm{NO}_3$ $(B)$ $\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7$ $(C)$ $\mathrm{Ba}\left(\mathrm{N}_3\right)_2$ $(D)$ $\mathrm{Mg}_3 \mathrm{~N}_2$
Choose the correct statement($s$) about the above process
$(A)$ $OH ^{-}$ions react with $N _2 H _4$ at the anode to form $N _2( g )$ and water, releasing 4 electrons to the anode.
$(B)$ At the cathode, $N _2 H _4$ breaks to $N _2( g )$ and nascent hydrogen released at the electrode reacts with oxygen to form water.
$(C)$ At the cathode, molecular oxygen gets converted to $OH ^{-}$.
$(D)$ Oxides of nitrogen are major by-products of the electrochemical process.
