Hydrogen peroxide solution breaks down very slowly at room temperature, forming oxygen gas. When liquid detergent is added, this gas creates a foam that rises. Five test-tubes are filled to half their volume with hydrogen peroxide solution. A drop of liquid detergent is then added to each test-tube. Different metal oxides are put into four of the test-tubes, and the height of the foam produced after one minute is measured. The results are shown. Which conclusion can be drawn from these results?
- AMetal oxides do not affect the rate of this reaction.
- BAll metal oxides increase the rate of this reaction and act as catalysts.
- CManganese(IV) oxide is the best catalyst of the four metal oxides tested.
- DOnly transition element oxides increase the rate of this reaction.