Question

Melting of wax is a _______ change.
A. Physical
B. Chemical
C. Both A and B
D. None of the above

Answer 1

Hint- In order to deal with this question first we have to understand the basic term which is used in this question that is melting. We will first study the characteristics of physical and chemical change and then by taking an example we will proceed further to solve it.

Complete answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Melting: At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting.
Melting of wax, by itself, involves a change of state from solid to liquid. When the physical state of a substance changes, no new products are formed.
When the candle burns, the wax slowly melts which freezes after some time (Physical change)

Hence, melting of wax is physical change and the correct answer is option A.

Note- In physical change only the physical property of a substance changes, but in chemical change the chemical property also changes. Chemical changes are also known as chemical reactions. A chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced.