The equation for the decomposition of hydrogen peroxide is shown. The reaction is exothermic. When a small amount of a catalyst is added, the oxygen is produced more quickly. Which statement about the catalyst is correct?
A.
The catalyst makes the reaction more exothermic.
B.
The mass of catalyst is the same before and after the reaction.
C.
The catalyst increases the final volume of oxygen produced.
D.
All of the catalyst is used up in the reaction.
Exam No：0620_s25_qp_11 Year：2025 Question No：15
Answer:
B
Knowledge points:
4.1.2.2. the cathode as the negative electrode
Solution:
Download APP for more features
1. Tons of answers.
2. Smarter Al tools enhance your learning journey.
IOS
Download
Download
Android
Download
Download
Google Play
Download
Download