JEE Main 2022 · 26 Jun · Shift 1 · Chemistry Q89

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ChemistryInteger+4 / -1Question 89 of 90

Compound 'P' on nitration with dil. $\mathrm{HNO_3}$ yields two isomers (A) and (B). These isomers can be separated by steam distillation. Isomers (A) and (B) show the intramolecular and intermolecular hydrogen bonding respectively. Compound (P) on reaction with conc. $\mathrm{HNO_3}$ yields a yellow compound 'C', a strong acid. The number of oxygen atoms is present in compound 'C' ______.

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Answer and worked solution

Official answer: 7

Identify P. Dilute nitration gives o-nitrophenol (intramolecular H-bond, steam volatile) and p-nitrophenol (intermolecular H-bond): P is phenol.

C. Concentrated $\mathrm{HNO_3}$ gives picric acid, 2,4,6-trinitrophenol, $\mathrm{C_6H_2(NO_2)_3OH}$ : $3\times2+1=7$ oxygen atoms.

Answer: 7

Topics:Phenols Aromatic hydrocarbons and electrophilic substitution

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JEE Main 2022 · 26 Jun · Shift 1, Chemistry question 89