Question

Is respiration a physical change or a chemical change?How?

Answer 1

Answer:

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this is your answer.......

Yes, respiration is a chemical change. Oxygen is taken during the respiration,the output should be also the oxygen in order to make it a physical change. But,the output is carbon dioxide which is completely different from the oxygen

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Answer 2

It’s chemical change because when we breath the energy in the oxygen is consumed so it cannot come back so it’s chemical change