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Which of the ...

Question

Which of the following are features of chemical changes?

A

Formation of a new substance

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B

Physical mixing of two substances

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C

Change cannot be undone physically

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D

Change in chemical composition

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Solution

The correct options are
A Formation of a new substance
C Change cannot be undone physically
D Change in chemical composition
Chemical changes produce new combinations of matter. The chemical composition of a new substance is different from the original components and these cannot be obtained back by physical methods.

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