Q1 / 180 · COMEDK 2018 · Chemistry

Which of the following is not an ore of magnesium?

  • A
    Carnallite
  • B
    Dolomite
  • Correct answer
    C
    Calamine
  • D
    Sea water

Solution

Carnallite : $\mathrm{KCl} \cdot \mathrm{MgCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ Dolomite: $\mathrm{MgCO}_{3} \cdot \mathrm{CaCO}_{3}$ Calamine : $\mathrm{ZnCO}_{3}$ Sea water : ore of magneisum $\therefore$ Calamine is not an ore of magnesium.

Hence, the correct answer is option: 'C'.

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