on heating copper powder in air, the surface of copper becomes black. it is A) combination reaction (B) decomposition reaction (C) dissociation reaction (D) displacement reaction
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3
Answer:
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Explanation:
A) combination reaction
Answered by
1
Answer:
A) Combination Reaction
Explanation:
If copper powder is heated in air, it reacts with oxygen forming Copper Oxide.
Reaction:
2Cu(s) + O2 (g) ---> 2CuO
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