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A substance that loses oxygen during a reaction is said to be:
AReduced
BRefined
CRepelled
DRestored
Answer & Solution
Correct answer: A. Reduced
1. Copper oxide heated with hydrogen loses oxygen.
2. Copper is obtained back.
3. It is said to be reduced.
_Source: NCERT Class 10 Science, Ch 1 'Chemical Reactions and Equations'_
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