When substances go through chemical changes, which of the following will always happen?

Question

A.
One or more substances with different chemical properties will form.
B.
One or more substances will be completely destroyed.
C.
Exactly one new substance will form and one will be destroyed.
D.
A gas will form or a white solid will precipitate.

Answer 1

The correct answer is:

A. One or more substances with different chemical properties will form.

In a chemical change, the original substances (reactants) are transformed into new substances (products) that have different chemical properties. The other options do not accurately describe what always happens in every chemical change. For example, substances are not destroyed; they are rearranged, and a variety of outcomes can occur (not just the formation of a gas or precipitate).