If copper oxide becomes copper in the reaction with hydrogen, what change has occurred?
Answer and explanation
Correct answer: Reduction due to removal of oxygen
Copper oxide contains oxygen bonded to copper. In the reaction CuO + H₂ → Cu + H₂O, oxygen is removed from copper oxide and combines with hydrogen to form water. Removal of oxygen is defined as reduction, so option A is correct. Addition of oxygen would indicate oxidation, while precipitation and evaporation do not describe this chemical change.
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What is the correct answer to this question?
Reduction due to removal of oxygen
Why is this the correct answer?
Copper oxide contains oxygen bonded to copper. In the reaction CuO + H₂ → Cu + H₂O, oxygen is removed from copper oxide and combines with hydrogen to form water. Removal of oxygen is defined as reduction, so option A is correct. Addition of oxygen would indicate oxidation, while precipitation and evaporation do not describe this chemical change.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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