Multiple choice

Which of the following compounds is used for producing Portland cement in dry process plants?

  1. Magnesium oxide

  2. Monomagnesium phosphate

  3. Magnesium sulfate

  4. Manganese(IV) oxide

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A Correct answer
Explanation

Magnesium oxide is a white solid mineral that occurs naturally as periclase and is a source of magnesium. It is hygroscopic in nature. MgO is one of the raw materials for making Portland cement in dry process plants.