An element 'X' does not liberate hydrogen from acids but react with oxygen to give a black coloured product.Identify 'X' and the black coloured product and also write the reaction of 'X' with oxygen?
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The metal X is copper (Cu) which reacts with oxygen when heated in the air to form black coloured copper(ll) oxide. The reaction can be written as:
2Cu+O
2
→2CuO
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