Question

Magnesjum ribbon is rubbed with sand paper to
remove​

Answer 1

Answer:

Like rusting in case of iron, with magnesium, the oxide layer forms a white coating on the outside of the metal that will slow down or interfere with the burning process. Rubbing with sand paper helps to remove this oxide layer due to which burning speeds up.

Answer 2

Answer:

HELLO...

Magnesium ribbon is rubbed with the sandpaper before burning is *to remove all the impurities* which will alter and disturb the reaction with oxygen while burning.

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