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| Q.3 | Which French chemist summarised his experiment in 1806, and proved that the mass ratio of elements in a chemical compound is always the same, regardless of the source of the compound? | |
| Ans | 1. Joseph Proust | |
| 2. Jacob Berzelius | ||
| 3. John Dalton | ||
| 4. Robert Boyle |
Correct Ans: 1
