AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Conc. \(\mathrm{HNO}_3\) turns brown on standing due to formation of
- A NO
- B \(\mathrm{NO}_2\)
- C \(\mathrm{N}_2 \mathrm{O}\)
- D \(\mathrm{N}_2 \mathrm{O}_4\)
Answer & Solution
Correct Answer
(B) \(\mathrm{NO}_2\)
Step-by-step Solution
Detailed explanation
The decomposition of \(\mathrm{HNO}_3\) is represented by the equation. \(4 \mathrm{HNO}_3 \longrightarrow 2 \mathrm{H}_2 \mathrm{O}+4 \mathrm{NO}_2+\mathrm{O}_2\) Due to the formation of nitrogen dioxide, it turns yellow brown. Hence, option (b) is correct.
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