Which from following reagents is used in the conversion of phenol to picric acid?

1. dil. Nitric acid
2. conc. Nitrous acid
3. conc. Sulphuric acid
4. conc. $\mathrm{HNO}_3+$ conc. $\mathrm{H}_2 \mathrm{SO}_4$

Solution

[Note: In the question, $\mathrm{HNO}_2$ is changed to $\mathrm{HNO}_3$ to apply appropriate textual concepts.]

Asked in: MHT CET 2024 (11 May Shift 2)

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