Question

which of the following is not an indication of chemical change due to application of heat?
a. change in color
b.change in odor
c.change in taste
d.change in size​

Answer 1

The change in size (option d) is not an indicator of chemical change due to the application of heat.

This can be understood as follows:

• A chemical change occurs when there is the formation of a new compound from the original compound due to the breaking or formation of new chemical bonds.
• When heat is applied to a particular substance it may change its color, smell, and taste which are the characteristics of a new substance.
• However, the change of shape and size may occur on the application of heat due to the rearrangement of molecules. But this change is the indication of physical change.
• Hence, a change in size is not a chemical change.