Does a change always produce a new substance?explain in detail with relevant examples.
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Answer:
no it is not compulsory;
Explanation:
like for eg. if a paper is cut into pieces, it is still in the form of paper only, but if we burn it then only it changes it's state from paper to ashes.
so it is not necessary always .
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Explanation:
what does mixed of substance cause a change?
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