Question:
State whether the following statements are True/False.
(i) Air is necessary for combustion.
(ii) Magnesium is a non-combustible metal.
(iii) Carbon dioxide is an excellent fire extinguisher.
(iv) Calorific value of wood is higher than that of coal.
Solution:
1. True, air contains oxygen and oxygen is a supporter of combustion.
2. False, magnesium is a combustible metal.
3.True
4.False, calorific value of coal is higher than that of wood.