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chemical reactions and equations — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencechemical reactions and equations2 Marks
Question
Why should a magnesium ribbon be cleaned before burning in air ?
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Answer

Magnesium ribbon reacts with oxygen present in air to form a protective and inert layer of magnesium oxide on its surface. This layer is unreactive and prevents the ribbon from burning. So, before burning in air, magnesium ribbon is cleaned.

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