Question

1. Teacher cleaned the magnesium ribbon with sand paper before performing an experiment Why did the teacher do that? a. To smoothen the ribbon b. To remove the layer of carbon dioxide c. To remove the layer of magnesium oxide d. All of the above​

Answer 1

answer

all of the above

explation

because it was so dirty

Answer 2

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.