When magnesium ribbon burns in air or oxygen, a product is formed. State the type of chemical reaction and name the product formed in the reaction. Write the balanced chemical equation of this reaction.

Q. Name the products formed when ethane burns in air. Write the balanced chemical equation for the reaction showing the types of energies liberated.

Q. (a) Define the following in terms of gain or loss of hydrogen with one example each:
(i) oxidation (ii) reduction
(b) When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

Q. (a) Potassium chlorate (KClO₃) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
(b) Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.

Q. Question 20.2

Write the balanced chemical equation for the following reaction and identify the type of reaction.

Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.