Magnesium ribbon ko burn karne se phele sand paper se kyu saf karte ha

1.	Magnesium ribbon ko burn karne se phele sand paper se kyu saf karte ha
Answer» When magnesium ribbon comes in contact with the oxygen present in air, a layer of magnesium oxide is formed on the surface of the magnesium ribbon. This layer will act as a barrier and will not allow magnesium ribbon to burn.So, to remove this layer, a magnesium ribbon is cleaned with sand paper before burning in air. This is due to the formation of white layer

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