Question

why should magnesium ribbon be cleaned before burning in air​

Answer 1

Because the layer of magnesium oxide which is formed due to reaction of magnesium with air can be removed in order to get the desired chemical reaction.

Answer 2

Hello my dear mate..

Here is your answer --

Magnesium ribbon must be cleaned before burning in air so that the layer of magnesium oxide ( which is formed due to reaction of magnesium with air ) can be removed in order to get the desired chemical reaction.

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