A. A compound B. A mixture of compounds C. A metals D. An elements
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A. Ca and Cl B. O C. Both (a) and (b) D. Cl and O
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A. Chemical change B. Physical change C. Sometimes chemical and sometimes physical D. Biological change
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A. Cobalt B. Nickel C. Aluminum D. Iron
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A. Copper B. Silver C. Diamond D platinum