In the following list, only is not an example of a chemical reaction.
A) the formation of polyethylene from ethylene
B) dissolution of a penny in nitric acid
C) a burning candle
D) the rusting of iron
E) the condensation of water vapor

Question

Quizplus · Accepted Answer

The condensation of water vapor is a physical change, not a chemical reaction. The change is from a gas to a liquid, but the molecules of the water do not change chemically. The other choices involve chemical reactions where atoms are rearranged and molecules are formed or broken down.

In the Following List, Only Is Not an Example of a Chemical