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Chemistry · Class 10 · Chemical Reactions
Q7. Why should a magnesium ribbon be cleaned before burning in air?
✓Because a layer of magnesium oxide forms on the surface, which stops it from burning properly. Cleaning removes this coating so the metal can react directly with oxygen.
3/3
AI Feedback You got the oxide-layer reasoning exactly right — that's the key concept examiners look for here. Nicely explained.
Topic mastery: Strong
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ExamAce Practice — Subject CoverageClasses VIII–XII
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