Final answer:
The classification of properties includes the tendency of ethyl alcohol to burn and the flammability of propane gas as chemical properties, whereas the shine on silver and the odor of paint thinner are physical properties. Option A&D are correct.
Step-by-step explanation:
When it comes to classifying properties of substances, it's important to understand the difference between physical and chemical properties. Physical properties can be observed or measured without changing the composition of the substance, such as mass, color, and volume. On the other hand, chemical properties describe a substance's ability to undergo changes that transform its chemical identity, such as reactivity with other chemicals and flammability. Here are the classifications for the given properties:
a. The tendency of ethyl alcohol to burn is a chemical property, because burning involves a chemical reaction.
b. The shine on silver is a physical property, as it is related to the appearance of the substance without changing its composition.
c. The odor of paint thinner is also a physical property, because the odor can be detected without causing a chemical change.
d. The flammability of propane gas is a chemical property, as it describes the gas's ability to combust, which involves a chemical transformation.