Question

Burning of a candle is a good example of physical and chemical changes occurring at the same time. The melting of wax is a physical change, and burning of the wick is a chemical change.

A) True
B) False

Answer 1

The statement is true: burning a candle involves a physical change (melting of wax) and a chemical change (burning of the wick, producing new substances).

Step-by-step explanation:

The statement is true: the burning of a candle involves both physical and chemical changes. The melting of wax is indeed a physical change, as the wax transitions from a solid to a liquid state without changing its chemical composition. On the other hand, the burning of the wick is a chemical change, where the wax reacts with oxygen in the air to produce new substances such as water and carbon dioxide through a process known as combustion. This change not only alters the appearance but also the molecular structure, resulting in new chemical properties.