When a reaction takes place, the mass of the individual elements changes after the reaction is over.

False

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True

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Solution

The correct option is A False
The law of Conservation of mass states that mass can neither be created nor be destroyed in chemical reaction. The given statement is false beacuse the mass of individual element at the beginning of a reaction is equal to the mass of that element after reaction.

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Z n (s) + 2 A g^{+} (a q) \to Z n^{2 +} (a q) + 2 A g (s)

There will be some change in mass when a chemical reaction takes place.

When a chemical change takes place in matter, we commonly say a chemical reaction takes place

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