Question

Why should a magnesium ribbon be cleaned before burning in air?​

Answer 1

$\huge\red{Answer}$

A magnesium ribbon should be cleaned before burning in air because when it comes in contact with air (oxygen ), its first layer gets oxidized preventing it from burning.

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Answer 2

HEYA MATE !

Mg ribbon is covered with magnesium oxide which don't let the ribbon to burn properly.For proper combustion it is necessary to clean magnesium ribbon with sand paper.

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