Which of the following does not represent a chemical change?
A)a freshly cut apple turns brown
B)milk turns sour on standing at room temperature
C)when cooled to 0°C, liquid water becomes ice
D)frying an egg
E)fermentation of sugar to alcohol

Question

Quizplus · Accepted Answer

When liquid water is cooled to 0°C, it becomes ice which is a physical change since there is no alteration in the chemical composition of the water molecules. In all the other options, chemical changes are taking place resulting in the formation of new substances.

Which of the Following Does Not Represent a Chemical Change