Hydrogen reduces hot copper(II) oxide to give
ACopper carbonate and CO2
BCopper and water
CCopper sulphate and SO2
DCopper chloride and HCl
Answer & Solution
Correct answer: B. Copper and water
1. Hydrogen is a good reducing agent.
2. It removes oxygen from CuO at high temperature.
3. Products are copper metal and water.
4. Equation: CuO + H2 -> Cu + H2O.
_Source: Selina Concise Chemistry Class 8, Ch on Hydrogen (Mistral OCR'd PDF), section on reducing nature_
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