In the following list,only ________ is not an example of a chemical reaction.
A)burning a plastic water bottle
B)the production of hydrogen gas from water
C)the tarnishing of a copper penny
D)chopping a log into sawdust
E)charging a cellular phone

Question

Quizplus · Accepted Answer

Chopping a log into sawdust is a physical change, not a chemical reaction. The other choices all involve chemical reactions where the substance(s) involved undergo a chemical change.

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