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| Q. |
Quartz is made of – |
| A. | Calcium Sulphate |
| B. | Calcium Silicate |
| C. | Sodium Sulphate |
| D. | Sodium Silicate |
| Answer» D. Sodium Silicate | |
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Explanation: Quartz is an abundant mineral in the Earth's continental crust. It is made tip of a continuous framework of SiO4 silicon-oxygen tetrahedra, wit Ii each oxygen being shared between two tetrahedra, giving an overall formula SiO2. |
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