Hydrogen & s-Block · JEE Advanced previous year questions

2024 2 questions

1. Q402024 · 26 May 2024 · Paper 1· One or more correct

   Reaction of \textit{iso}-propylbenzene with ${\mathrm{O}}_2$ followed by the treatment with ${\mathrm{H}}_3{\mathrm{O}}^{+}$ forms phenol and a by-product $\mathbf{P}$. Reaction of $\mathbf{P}$ with 3 equivalents of $\mathrm{C}{\mathrm{l}}_2$ gives compound $\mathbf{Q}$. Treatment of $\mathbf{Q}$ with $\mathrm{Ca}(\mathrm{OH}{)}_2$ produces compound $\mathbf{R}$ and calcium salt $\mathbf{S}$. The correct statement(s) regarding $\mathbf{P}$, $\mathbf{Q}$, $\mathbf{R}$ and $\mathbf{S}$ is(are)

   1. A.Reaction of $\mathbf{P}$ with $\mathbf{R}$ in the presence of KOH followed by acidification gives $(\mathrm{C}{\mathrm{H}}_3{)}_2\mathrm{C}(\mathrm{OH})\mathrm{CC}{\mathrm{l}}_3$
   2. B.Reaction of $\mathbf{R}$ with ${\mathrm{O}}_2$ in the presence of light gives phosgene gas
   3. C.$\mathbf{Q}$ reacts with aqueous NaOH to produce $\mathrm{C}{\mathrm{l}}_3\mathrm{CC}{\mathrm{H}}_2\mathrm{OH}$ and $\mathrm{C}{\mathrm{l}}_3\mathrm{CCOONa}$
   4. D.$\mathbf{S}$ on heating gives $\mathbf{P}$
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   Answer: A, B, D

2. Q502024 · 26 May 2024 · Paper 1
   
   1. A.P-3, Q-5, R-4, S-1
   2. B.P-3, Q-2, R-4, S-1
   3. C.P-3, Q-5, R-1, S-4
   4. D.P-5, Q-2, R-4, S-1
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   Answer: A