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Isolation of Elements question

2019 · Shift 1 · Q3
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Isolation of Elements question

2019 · Shift 1 · Q3

JEE AdvancedChemistryIsolation of ElementsMCQ+3 / −1
Calamine, malachite, magnetic and cryolite, respectively, are
  1. A
    ZnCO3ZnCO_3ZnCO3​, CuCO3CuCO_3CuCO3​, Fe2O3Fe_2O_3Fe2​O3​, Na3AlF6Na_3AlF_6Na3​AlF6​
  2. B
    ZnSO4ZnSO_4ZnSO4​, CuCO3CuCO_3CuCO3​, Fe2O3Fe_2O_3Fe2​O3​, AlF3AlF_3AlF3​
  3. C
    ZnSO4ZnSO_4ZnSO4​, Cu(OH)2Cu(OH)_2Cu(OH)2​, Fe3O4Fe_3O_4Fe3​O4​, Na3AlF6Na_3AlF_6Na3​AlF6​
  4. D
    ZnCO3ZnCO_3ZnCO3​, CuCO3CuCO_3CuCO3​.Cu(OH)2Cu(OH)_2Cu(OH)2​, Fe3O4Fe_3O_4Fe3​O4​, Na3AlF6Na_3AlF_6Na3​AlF6​
View written solutionFree

Correct answer: D

  1. Identify each mineral/ore by its chemical formula

    We match the given names one by one:

    • Calamine =ZnCO3= ZnCO_3=ZnCO3​
    • Malachite =CuCO3⋅Cu(OH)2= CuCO_3\cdot Cu(OH)_2=CuCO3​⋅Cu(OH)2​
    • Magnetic ore means magnetite =Fe3O4= Fe_3O_4=Fe3​O4​
    • Cryolite =Na3AlF6= Na_3AlF_6=Na3​AlF6​

  2. Compare with the options

    • Option A: ZnCO3, CuCO3, Fe2O3, Na3AlF6ZnCO_3,\ CuCO_3,\ Fe_2O_3,\ Na_3AlF_6ZnCO3​, CuCO3​, Fe2​O3​, Na3​AlF6​

      • Calamine is correct.
      • Malachite is not just CuCO3CuCO_3CuCO3​.
      • Magnetic ore is not Fe2O3Fe_2O_3Fe2​O3​.
      • So, incorrect.

    • Option B: ZnSO4, CuCO3, Fe2O3, AlF3ZnSO_4,\ CuCO_3,\ Fe_2O_3,\ AlF_3ZnSO4​, CuCO3​, Fe2​O3​, AlF3​

      • Calamine is not ZnSO4ZnSO_4ZnSO4​.
      • Cryolite is not AlF3AlF_3AlF3​.
      • Incorrect.

    • Option C: ZnSO4, Cu(OH)2, Fe3O4, Na3AlF6ZnSO_4,\ Cu(OH)_2,\ Fe_3O_4,\ Na_3AlF_6ZnSO4​, Cu(OH)2​, Fe3​O4​, Na3​AlF6​

      • Calamine is not ZnSO4ZnSO_4ZnSO4​.
      • Malachite is not just Cu(OH)2Cu(OH)_2Cu(OH)2​.
      • Incorrect.

    • Option D: ZnCO3, CuCO3⋅Cu(OH)2, Fe3O4, Na3AlF6ZnCO_3,\ CuCO_3\cdot Cu(OH)_2,\ Fe_3O_4,\ Na_3AlF_6ZnCO3​, CuCO3​⋅Cu(OH)2​, Fe3​O4​, Na3​AlF6​

      • All four are correct.

  3. Final answer

    Therefore, the correct option is: D\boxed{D}D​

  4. Comparison with stored correct answer

    Stored correct answer = D

    My derived answer = D

    Hence, they agree.

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