Why should magnesium ribbon be cleaned before burning in air ?

Why should a magnesium ribbon be cleaned before burning in air?

A piece of magnesium ribbon was heated to redness in an atmosphere of nitrogen and then cooled with water. The gas evolved is

Why should a connection wire be thick ?

Calculate the mass of magnesium oxide which would be obtained by burning 120 g of magnesium in air.

Why is magnesium essential for plants?

Mg burns in air to give

Hydrogen burns in air with a

Amorphous boron on burning in air forms

Name the type of chemical reaction that occurs when magnesium ribbon is burned in air.

Write the observations for the following: Piece of magnesium ribbon is placed over flame.