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Unit - 7.2 Properties and Uses of Hydrogen — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYUnit - 7.2 Properties and Uses of Hydrogen1 Mark
Question
Briefly describe your observations when hydrogen gas is passed over heated copper oxide.
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Answer

When hydrogen gas is passed over hot copper oxide, the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained.

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