Question

question 9 of 25
which of the following is an example of a chemical change?
a. a solid reacting with a gas to form a new solid
b. a mixture of a solid and a liquid forming
c. a solid dissolving in a liquid
d. a liquid evaporating into a gas

Explanation:

A chemical change results in the formation of a new substance. In option A, a solid reacting with a gas to form a new solid indicates a chemical reaction and a new - substance formation. Option B is a physical mixing, option C is a physical dissolution process, and option D is a physical state - change (evaporation).

Answer:

A. A solid reacting with a gas to form a new solid