JEE Advanced2023ChemistryAlcohols Phenols and EthersActual
A trinitro compound, 1 , 3 , 5 -tris-( 4 -nitrophenyl) benzene, on complete reaction with an excess of Sn / HCl gives a major product, which on treatment with an excess of NaNO 2 / HCl at 0 ° C provides P as the product. P , upon treatment with excess of H 2 O at room temperature, gives the product Q . Bromination of Q in aqueous medium furnishes the product R . The compound P upon treatment with an excess of ph
Correct answer
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Step-by-step solution
Nitrobenzene part converts to aniline part using Sn / HCl . Aniline forms diazonium salt with nitrous acid and hydrogen chloride. Diazonium salt forms phenol with warm water.Phenol forms poly substituted bromo compound with bromine water. The hetero atoms present the product R   are 6 bromine atoms and 3 oxygen atoms. Number of Hetero atoms in R is 9 .