Hydrogen peroxide is a liquid that decomposes to form oxygen gas and
water. The occasional bubble you might see in a beaker that contains
hydrogen peroxide is evidence of this reaction. But if a small amount of
manganese oxide powder is added to the beaker, many small bubbles start
forming in the liquid. What part does the manganese oxide play in this
reaction?

A. It is a catalyst that increases the rate of the reaction.

B. It is a substance that supplies extra energy for the reaction.

C. Its addition to the liquid makes molecules of hydrogen peroxide
move faster.

D. It is a reactant that is necessary for the reaction to begin.
SUBMIT