Question

6. What happens when an incense stick is burned?

Answer 1

• The burning of incense sticks is a chemical change because new substances such as smoke and ash are formed.
• When an incense stick is burned, certain chemicals which are present in the incense stick are released into the air. This results in a pleasant smell and ash is left behind.
• This is a type of irreversible change because we cannot get back the incense stick from the chemicals and ash.