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Some Basic Concepts of Chemistry question

2022 · 25 Jul · Shift 1 · Q1
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Some Basic Concepts of Chemistry question

2022 · 25 Jul · Shift 1 · Q1

JEE MainChemistrySome Basic Concepts of ChemistryMCQ+4 / −1
SO2Cl2\mathrm{SO}_{2} \mathrm{Cl}_{2}SO2​Cl2​ on reaction with excess of water results into acidic mixture SO2Cl2+2H2O→H2SO4+2HCl\mathrm{SO}_{2} \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2} \mathrm{SO}_{4}+2 \mathrm{HCl}SO2​Cl2​+2H2​O→H2​SO4​+2HCl 16 moles of NaOH\mathrm{NaOH}NaOH is required for the complete neutralisation of the resultant acidic mixture. The number of moles of SO2Cl2\mathrm{SO}_{2} \mathrm{Cl}_{2}SO2​Cl2​ used is :
  1. A
    16
  2. B
    8
  3. C
    4
  4. D
    2
View written solutionFree

Correct answer: C

  1. The reaction of sulfuryl chloride with excess water is:
SO2Cl2+2H2O→H2SO4+2HCl\mathrm{SO_2Cl_2 + 2H_2O \rightarrow H_2SO_4 + 2HCl}SO2​Cl2​+2H2​O→H2​SO4​+2HCl
  1. For each mole of SO2Cl2\mathrm{SO_2Cl_2}SO2​Cl2​, the acidic products formed are:
  • 111 mole of H2SO4\mathrm{H_2SO_4}H2​SO4​
  • 222 moles of HCl\mathrm{HCl}HCl
  1. Now calculate how many moles of NaOH\mathrm{NaOH}NaOH are needed to neutralize these acids.

  • Neutralization of sulfuric acid:

    H2SO4+2NaOH→Na2SO4+2H2O\mathrm{H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O}H2​SO4​+2NaOH→Na2​SO4​+2H2​O

    So, 111 mole of H2SO4\mathrm{H_2SO_4}H2​SO4​ requires 222 moles of NaOH\mathrm{NaOH}NaOH.

  • Neutralization of hydrochloric acid:

    HCl+NaOH→NaCl+H2O\mathrm{HCl + NaOH \rightarrow NaCl + H_2O}HCl+NaOH→NaCl+H2​O

    So, 222 moles of HCl\mathrm{HCl}HCl require 222 moles of NaOH\mathrm{NaOH}NaOH.

  1. Therefore, total NaOH\mathrm{NaOH}NaOH required per mole of SO2Cl2\mathrm{SO_2Cl_2}SO2​Cl2​ is:
2+2=42 + 2 = 42+2=4

So,

1 mole SO2Cl2⇒4 moles NaOH1 \text{ mole } \mathrm{SO_2Cl_2} \Rightarrow 4 \text{ moles } \mathrm{NaOH}1 mole SO2​Cl2​⇒4 moles NaOH
  1. Given that 161616 moles of NaOH\mathrm{NaOH}NaOH are required:
moles of SO2Cl2=164=4\text{moles of } \mathrm{SO_2Cl_2} = \frac{16}{4} = 4moles of SO2​Cl2​=416​=4
  1. Hence, the correct option is:
C: 4\boxed{\text{C: } 4}C: 4​
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