Burning of wood is a chemical reaction in which heat is released.
Which of the following are the examples of a chemical reaction?
i. Burning of wood
ii. Cutting of wood
iii. Conversion of steam to water
iv. Rusting of almirah
Which of the following are examples of chemical reactions?
i. Burning wood
ii. Cutting wood
v. Dissolving common salt in water
(a) Discuss some characteristics of chemical changes. (b) How is burning of wood a chemical change? [3 MARKS]