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D and F Block Elements question

2022 · Shift 2 · Q4
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D and F Block Elements question

2022 · Shift 2 · Q4

JEE AdvancedChemistryD and F Block ElementsNumerical+3 / −1
The reaction of Xe\mathrm{Xe}Xe and O2F2\mathrm{O}_{2}{F}_{2}O2​F2​ gives a Xe\mathrm{Xe}Xe compound P\mathbf{P}P. The number of moles of HF\mathrm{HF}HF produced by the complete hydrolysis of 1 mol1 \mathrm{~mol}1 mol of P\mathbf{P}P is ‾\underline{\hspace{2cm}}​.
Numerical answer
View written solutionFree

Correct answer: 4

  1. Identify the xenon compound formed with O2F2\mathrm{O_2F_2}O2​F2​

    Dioxygen difluoride is a strong fluorinating agent. Xenon reacts with O2F2\mathrm{O_2F_2}O2​F2​ to form xenon tetrafluoride:

    Xe+2O2F2→XeF4+2O2\mathrm{Xe + 2O_2F_2 \rightarrow XeF_4 + 2O_2}Xe+2O2​F2​→XeF4​+2O2​

    So, the compound P\mathbf{P}P is:

    P=XeF4\mathbf{P} = \mathrm{XeF_4}P=XeF4​

  2. Write the complete hydrolysis reaction of XeF4\mathrm{XeF_4}XeF4​

    Complete hydrolysis of xenon tetrafluoride gives xenon trioxide, HF, and oxygen:

    6XeF4+12H2O→2XeO3+24HF+4Xe+3O26\mathrm{XeF_4} + 12\mathrm{H_2O} \rightarrow 2\mathrm{XeO_3} + 24\mathrm{HF} + 4\mathrm{Xe} + 3\mathrm{O_2}6XeF4​+12H2​O→2XeO3​+24HF+4Xe+3O2​

  3. Calculate moles of HF produced per mole of XeF4\mathrm{XeF_4}XeF4​

    From the balanced equation:

    6 mol XeF4→24 mol HF6\text{ mol } \mathrm{XeF_4} \rightarrow 24\text{ mol } \mathrm{HF}6 mol XeF4​→24 mol HF

    Therefore,

    1 mol XeF4→246=4 mol HF1\text{ mol } \mathrm{XeF_4} \rightarrow \frac{24}{6} = 4\text{ mol } \mathrm{HF}1 mol XeF4​→624​=4 mol HF

  4. Final answer

    The number of moles of HF\mathrm{HF}HF produced by complete hydrolysis of 111 mol of P\mathbf{P}P is:

    4\boxed{4}4​

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