Question

Burning of candle is
A. physical change
B. Chemical change
C. both A and B
D. None of these

Answer 1

Hint: Physical change includes change only in physical appearance of the substance and no chemical changes. They are reversible in nature and often seen by our physical senses.

Complete step by step solution:
> Chemical changes: Such changes happen in chemical composition and ultimately form an altogether new product which is different from the initial one the area might be visible by naked eye.
Answer is (c) both (A) and (B) is the right answer
> During the burning of candle, they are both physical and chemical change can be observed:
- Physical change is observed when the candle melts as it is visible by naked eye and also it can be cooled and reshaped, and it turns out to be a reversible process. So physical change is observed in a candle
- Chemical change is observed when the wax melts near the flame and converts into wax vapour (change of state is observed), the liquid wax vaporized into vapour form near the flame, and also the chemical energy is converted into light heat energy as we can feel the flame so chemical composition is changed and hence Chemical change.

Note: Chemical change can be seen through naked Example Burning of crackers, Chemical energy converted into heat, sound and light energy.