Question

1. which of the following is the best description of the results of a chemical reaction?

a. the substance seems to disappear after dissolving in water.
b. a new substance with different properties is formed.
c. the reaction can be reversed to get back to the original substance.
d. the substance changes from liquid to solid at a low temperature.

Explanation:

A chemical reaction is characterized by the formation of a new substance with different properties. Option A describes dissolution (a physical change). Option C is not always true for all chemical reactions. Option D describes a physical state change (freezing, a physical change). Only option B aligns with the definition of a chemical reaction.

Answer:

B. A new substance with different properties is formed.