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31-12-2015
Chemistry

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Which substance can be decomposed by a chemical change?
(1) Co (3) Cr(2) CO (4) Cu

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VenusRetrograde VenusRetrograde

01-01-2016

Answer: (2) CO

Co, Cr, and Cu are elements. Elements cannot be broken down by a chemical change, but compounds can. Since CO is a compound, it can be decomposed by a chemical change.

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