Question

If copper powder is heated then black coloured coating in formed on it. Due to formation of which substance is occur.​

Answer 1

Answer:

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Step-by-step explanation:

so basically when copper is heated ie is made to withstand in presence of air

it's oxidation takes place

so similarly when copper powder is heated

then it starts burning in presence of air and therefore a thin layer of blackish powder is formed at its surface

this powder is nothing but layer of copper oxide

so this can be represented by following balanced chemical reaction

2Cu+O2(heat is provided)=2CuO

thus is an exothermic reaction