This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means. read more
Yes it certainly is a physical change. In the solution of sugar and water, the sugar molecules occupy the gaps present between the water molecules at the microscopic level and no bond formation takes place. Hence, when water evaporates, the sugar molecules remain unchanged chemically. However they do not attain the crystal shape again. read more