Read the passage given below.
A chemical change is one in which changes take place on the molecular level. It produces a new substance whereas a physical change does not produce any new substance. To understand how a physical change occurs, take some sugar crystals and dissolve them in water. The water becomes sweet to taste, which shows that the molecules of sugar are present in water. Evaporate the sugar solution in a china dish over a Bunsen burner or a spirit lamp. A white residue is obtained in the china dish. All the properties of this residue are identical to sugar, which was earlier dissolved in water. Thus, we find that in this case no new substance is formed. Hence, dissolving of sugar in water is a physical change.
Change in state or phase are physical changes such as melting, freezing, vaporisation, condensation and sublimation. A chemical change results in a substance that was not there before.
Answer the following question by choosing the correct options given below.
Evaporation of sugar solution to obtain sugar is an example of a