Alcohols, Phenols & Ethers · JEE Main previous year questions

2022 2 questions

1. Q862022 · 29 Jul 2022 · Shift 2· Numerical answer

   A $1.84\mathrm{mg}$ sample of polyhydric alcoholic compound 'X' of molar mass $92.0g/mol$ gave $1.344\mathrm{mL}$ of ${\mathrm{H}}_2$ gas at STP. The number of alcoholic hydrogens present in compound 'X' is ____.

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   Answer: 6

2. Q672022 · 26 Jul 2022 · Shift 1

   Which technique among the following, is most appropriate in separation of a mixture of $100\mathrm{mg}$ of $p$-nitrophenol and picric acid ?

   1. A.Steam distillation
   2. B.2-5 ft long column of silica gel
   3. C.Sublimation
   4. D.Preparative TLC (Thin Layer Chromatography)
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   Answer: D