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A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen.
Answers (1)
Metal M is Cu as Cu is less reactive than hydrogen. So, it does not react with acids to release hydrogen.
No reaction
Copper metal does not burn in air even on strong heating.
Copper reacts with the oxygen on prolonged heating to form a black substance, i.e., copper (Il) oxide.
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