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

Question

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

Answer 1

The correct answer is:

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

In a chemical change, the original substances (reactants) undergo a transformation to create new substances (products) with different chemical properties. Options A and C are not universally true, as the number of substances can change in various ways, and substances are typically not "destroyed" but rather transformed. Option D is not always true as not all chemical reactions result in gas formation or precipitation.