which is true about Chemical Change?

A. It is reversible.
B. It produces new materials.
C.It changes only a material's color and odor.
D.It does not change a material's size and shape.

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The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.

Chemical reactions involve the production of new materials which are quite different from the reacting substances. Any new materials come from the reacting substances. Changes that may accompany a chemical reaction include colour, appearance and production of new materials, for example, a gas.

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