NH4NO3 on heating liberates an oxide of nitrogen. Oxidation state of nitrogen in that oxide will be
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → +1
On heating, ammonium nitrate decomposes into dinitrogen oxide (nitrous oxide) and water:
\( \displaystyle \ce{NH4NO3} \xrightarrow{\text{heat}} \ce{N2O + 2H2O} \)
The oxidation state of nitrogen in \( \ce{N2O} \) (oxygen −2, neutral molecule):
\( \displaystyle 2x + (-2) = 0 \;\Rightarrow\; x = +1 \)
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.