Question

Why is the magnesium ribbon cleaned with sandpaper before it is burned in air?

Answer 1

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Magnesium ribbon is rubbed with sandpaper before burning as there is a thin layer of magnesium oxide present on it due to its exposure to oxgen.

Hence for it's efficient burning, Magnesium ribbon is cleaned with sandpaper

Answer 2

so that that the layer of Magnesium oxide formed initially by its initial reaction with air GET Removed.

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