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| Q.31 | Which product is derived from limestone and diatomaceous earth, and is used as an antacid and as an anticaking agent in the preparation of food? | |
| Ans | 1. Disodium phosphate | |
| 2. Sodium ferrocyanide | ||
| 3. Calcium silicate | ||
| 4. Potassium sulfate |
Correct Ans: 3
