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Why should a magnesium ribbon be cleaned before it is burn in air |
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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. Magnesium ribbon should be cleaned with sandpaper before burning in the air because of the following reasons:\tMagnesium 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.\tTo remove the\xa0Magnesium oxide layer from the ribbon which may prevent or slow down the burning of\tmagnesium ribbon.\tUnwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction. |
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