JEE Main · 2022 · Shift-ImediumPB12-023

Which one of the following elemental forms is not present in the enamel of the teeth?

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

Which one of the following elemental forms is not present in the enamel of the teeth?

Options
  1. a

    Ca2+\mathrm{Ca^{2+}}

  2. b

    P3+\mathrm{P^{3+}}

  3. c

    F\mathrm{F^{-}}

  4. d

    P5+\mathrm{P^{5+}}

Correct Answerb

P3+\mathrm{P^{3+}}

Detailed Solution

Strategy: Identify the products of Xenon fluoride hydrolysis.

Step 1: Partial vs Complete Hydrolysis

  • Complete hydrolysis of \ceXeF4\ce{XeF4}: 3\ceXeF4+6\ceH2O2\ceXe+\ceXeO3+12\ceHF+1.5\ceO23\ce{XeF4} + 6\ce{H2O} \to 2\ce{Xe} + \ce{XeO3} + 12\ce{HF} + 1.5\ce{O2}.
  • Complete hydrolysis of \ceXeF6\ce{XeF6}: \ceXeF6+3\ceH2O\ceXeO3+6\ceHF\ce{XeF6} + 3\ce{H2O} \to \ce{XeO3} + 6\ce{HF}.
  • Partial hydrolysis of \ceXeF6\ce{XeF6}: \ceXeF6+\ceH2O\ceXeOF4+2\ceHF\ce{XeF6} + \ce{H2O} \to \ce{XeOF4} + 2\ce{HF}; \ceXeF6+2\ceH2O\ceXeO2F2+4\ceHF\ce{XeF6} + 2\ce{H2O} \to \ce{XeO2F2} + 4\ce{HF}.

Step 2: Analysis The formation of \ceXeO3\ce{XeO3} and \ceHF\ce{HF} is characteristic of complete hydrolysis.

Answer: (Option) [b] [Based on specific hydrolysis product in question]\boxed{\text{Answer: (Option) [b] [Based on specific hydrolysis product in question]}}

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