Question

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

Answer 1

magnesium ribbon be cleaned because magnesium is considered as one of the most reactive elements and its atmospheric gases like Oxygen and Carbon and forms its compound hence to change the rate of reaction it is generally cleaned before burning in air and to remove this layer bijali magnesium ribbon be cleaned before burning

Answer 2

$\huge\red{Answer}$

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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