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JEE Main 7 Jan 2020 Shift 1 Solved Paper

Question : 28

Total: 75

all the atoms o f a given element haveidentical properties including identical mass.Atoms o f different elements differ in mass.
chemical reactions involve reorganisation of atoms. These are neither created nor destroyed in a chemical reaction.
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.
matter consists o f indivisible atoms.

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