Question

When we burn magnesium ribbon . What is the white residue left after the reaction

Answer 1

the white Residue is the magnesium oxide which is basic in nature

Answer 2

When Magnesium ribbon(Mg) is burnt in air.It reacts with the Oxygen present in the air.And burns with white dazzling light along with a white residue known as "Magnesium oxide(MgO)"