With what, magnesium ribbon is cleaned before buning it in air.

When magnesium ribbon is burnt in air, the ash formed is

What happens when coal is heated or burn in air?

Write the balanced chemical equations fo rthe following reactions and identify the type of reaction in each case. magnesium ribbon is burnt in an atmosphere of nitrogen gas to from solid magnesium nitride.

The white powder formed when magnesium ribbon burns in oxygen it forms ..........

CAUTION: This activity needs the teacher's assistance. It would be better if students wear suitable eyeglasses. • Clean a magnesium ribbon, about 3-4 cm Tong by rubbing it with sand paper. Hold it with a pair of tongs. Burn it using a spirit lamp or a burner and collect the ash so formed in a watch glass as shown in Fig. Burn the magnesium ribbon keeping it away as far as possible from your eyes. What do you observe ?