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| Q. |
Glass is mainly composed of - |
| A. | Sodium silicate |
| B. | Calcium carbonate |
| C. | Calcium hydroxide |
| D. | Sodium bicarbonate |
| Answer» A. Sodium silicate | |
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Explanation: Glass is made from silica (SiO₂) and soda lime, which react to form sodium silicate. |
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