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Amongst the following statements, that which was not proposed by Dalton was:

1. Chemical reactions involve reorganization of atoms. These are neither created nor destroyed in a chemical reaction.
2. All the atoms of a given element have identical properties including identical mass. Atoms of different elements differ in mass.
3. When gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P.
4. Matter consists of indivisible atoms.

Correct answer: When gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P.

Solution

This statement, while related to gas behavior, was actually proposed by Avogadro, not Dalton. Dalton's atomic theory focused on the indivisibility of atoms and their mass properties, but did not specifically address the volume ratios of gases.

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