Q.

The chemical name or Quartz is –

A. Calcium oxide
B. Calcium phosphate
C. Sodium phosphate
D. Sodium silicate
Answer» D. Sodium silicate
Explanation: Quartz is a compound of one part silicon and two parts of oxygen, silicon dioxide, SiO2. Quartz is the most abundant silica mineral. It is used in a number of industries, the important being glass, foundry, sodium silicate, silicon alloys, etc. The various grades of sodium silicate are characterized by their SiO2:Na2O weight ratio.
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