Question

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Answer 1

copper will react with atmospheric substance to form copper oxide it brown black coloured  [CuO]

when it reacts with hydrogen gas it is a redox reaction

CuO + H₂ = cu + H₂O  

copper and water is formed

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Answer 2

Answer:

Copper will react with the atmospheric substance to form copper oxide it is brown black colour (CuO) when it reacts with hydrogen it will be a redox reaction

CuO+H2 =Cu+H2O

hydrogen and water are formed

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