Question

Which of the following ores does not contain oxygen?

Options

• Magnesite

• Zincite

• Epsom salt

• Cryolite

Answer 1

Cryolite

Explanation:

Cryolite (Na₃AlF₆) is a fluoride ore that does not contain oxygen. The other ores, like magnesite (MgCO₃), zincite (ZnO), and Epsom salt (MgSO₄ . 7H₂O), all contain oxygen in their composition.