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| Q. |
Washing soda is the common name of- |
| A. | Calcium Carbonate |
| B. | Calcium Bi-Carbonate |
| C. | Sodium Carbonate |
| D. | Sodium Bi-Carbonate |
| Answer» C. Sodium Carbonate | |
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Explanation: Washing soda, sodium carbonate decahydrate, efflorescent crystals used for washing, especially textiles. It is a compound of sodium (q.v.). |
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