28. Before burning in air, the
1 point
magnesium ribbon is cleaned by
rubbing with a sand paper to:
Make the ribbon surface shinier
Remove the layer of magnesium
oxide from the ribbon surface
Remove the layer of magnesium
nitrate from the ribbon surface
Remove the moisture from the
ribbon surface
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Answer:
Magnesium ribbon should be cleaned with sandpaper before burning in the air. It should be cleaned before burning due to the following reasons: Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.
Explanation:
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