Question

Differentiate between physical change and chemical change. [5 MARKS]

Answer 1

Each point: 1 Mark

$$\begin{array}{ccc}\text{S.no.}& \text{Physical Change}& \text{Chemical Change}\\ 1& \text{The identity of the substance is maintained.}& \text{The identity of the original substance is completely lost.}\\ 2& \text{The change is temporary, the substance returns to}& \text{The change is permanent.}\\ & \text{its original state as the cause of change is withdrawn.}& \\ 3& \text{No new substance is produced.}& \text{A new substance is always produced.}\\ 4& \text{Heat change may or may not occur.}& \text{Heat change may occur.}\\ 5& \text{Only the physical state or some of the physical}& \text{The substances after the change cannot come back}\\ & \text{properties of the substances are changed.}& \text{to its original state even when the cause of change is withdrawn.}\end{array}$$