Why should a magnesium ribbon be …

Magnesium ribbon reacts with oxygen present in air to form a protective and inery layer of magnesium on its surface.This layer is unreactive and prevents the ribbon from burning. Hence,it needs to be cleaned with sand paper before burning in air.

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Adithya Ks 5 years, 8 months ago

Clean the magnesium ribbon about 2cm long by rubbing it with the sand paper. Burn the magnesium ribbon. The magnesium ribbon burns with a dazzling white light and changes into a white powder.

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