4
practice testMultiple Choice

Practice Test

Question 4 • Physical Science

When hydrogen peroxide bubbles, it is undergoing a chemical change. Which statement best describes what is happening?

Answer
A
The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
B
The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
C
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
D
The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.

Explanation

Bubbling hydrogen peroxide indicates a chemical reaction in which hydrogen peroxide decomposes into different substances, including water and oxygen gas. The atoms are rearranged to form new molecules; they do not vanish or simply escape while the original hydrogen peroxide molecules stay intact. Therefore, the best choice is that the atoms break apart and form new types of molecules.

AI-written and checked against the verified answer.

Previous
Next