Question

We clean magnesium ribbon with sand paper before burning in air *

1)To remove MgO layer from the ribbon which may prevent or slow down the burning of Mg ribbon

2)To remove unwanted impurities deposited on the surface

3)To get only pure Mg for reaction

4)All of the above​

Answer 1

Answer:

)To remove MgO layer from the ribbon which may prevent or slow down the burning of Mg ribbon

Answer 2

Answer:

hiiiii bro

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.

Explanation:

bye

thank you❤

good night and sweet dreams