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  1. The chemical name of quartz is

    2. A.

     Calcium oxide
    B.

     Calcium phosphate
    C.

     Sodium phosphate
    D.

     Sodium silicate

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    Answer : Option D

    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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