Question

Which of the following always indicates that a physical change has taken place ?

A) Rusting
B) Burning
C) Melting
D) Changing Color

Answer 1

The correct answer option is C) Melting.

Step-by-step explanation:

Physical changes can be defined as the changes which affect the form of a chemical substance but not its chemical composition. These are the changes in which no bonds are broken or formed.

Melting is a physical change. Taking an example of melting ice: water simply changes its physical state but its chemical composition is same
`H_2O` for both Ice and liquid water.

Answer 2

C) Melting

Step-by-step explanation:

Physical changes refers to the change in physical state of matter.

While melting a substance it changes from the solid state to the liquid state. Thus, melting any substance refers to the physical change.