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11 February, 18:50

Which substance can be decomposed by a chemical change?

(1) Co (3) Cr (2) CO (4) Cu

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  1. 11 February, 20:17
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    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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