Provide proper answers on the basis of standard 10 cbse.
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Provide proper answers on the basis of standard 10 cbse.
Because magnesium is very reactive metal. It can react with air and forms magnesium oxide which is unable to burn. So it cleaned with sandpaper before burning.
Answer : Magnesium ribbon must be cleaned before burning in air so that the 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 has a white layer of Mgo(magnesium oxide) on its surface formed due to the slow reaction of moist air. This hinders the burning of magnesium ribbon.so, this is removed by rubbing with sandpaper before burning……
no
It’s done to remove protective layer of magnesium oxides and carbonates
Magnesium ribbon be cleaned before it is burning in air so that the unwanted impurities deposited on it can be removed and only pure magnesium can burn.