Question

Write the difference between :

a) burning of magnesium ribbon and burning of candle.

b) Rusting of iron and burning.

Answer 1

a).

A dazzling bright light could be seen when magnesium is burnt in air but in case of a candle its not much brighter than the magnesium and bright light of magnesium can affect our eyes.
Burning magnesium gives MgO while candle gives CO2.

b).

RUSTING

1. Rusting is a slow process.
2. Little heat is released.
3. Both air and moisture are necessary for rusting.

BURNING

1. Burning is fast oxidation.
2. large amounts of heat are released.
3. Only air is necessary for burning.