Q. Out of the following redox reactions
I. $\text{N}\text{H}_{4}\text{N}\text{O}_{3}\overset{\text{Δ}}{ \rightarrow } \, \text{N}_{2}\text{O}+2\text{H}_{2}\text{O}$
II. $\text{N}\text{H}_{4}\text{N}\text{O}_{2}\overset{\text{Δ}}{ \rightarrow }\text{N}_{2}+2\text{H}_{2}\text{O}$
III. $\text{P}\text{C}\text{l}_{5}\overset{\text{Δ}}{ \rightarrow } \, \text{P}\text{C}\text{l}_{3}+\text{C}\text{l}_{2}$
disproportionation is not shown in

NTA AbhyasNTA Abhyas 2020Redox Reactions Report Error

Solution:

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It is a redox reaction but not a disproportionation reaction. Since, different N-species are involved.
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It is a redox reaction but it is comproportionation reaction. Since, different N-species are involved
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Thus, it is also not a disproportionation reaction.