Question

Which of the following is/are the characteristic(s) of a catalyst?

• A. It changes equilibrium point.
• B. It alter the rate of reaction.
• C. it initiates the reaction.
• D. It increases the average kinetic energy of molecules.

Answer 1

Answer: (B), (D)

It alter the rate of reaction.
It increases the average kinetic energy of molecules.

A catalyst is a substance which can change the rate of reaction. There are a few things you need to know about catalyst.

1. Chemically, the catalyst remain unchanged during a reaction.

2. Catalyst does not change the quantity of products.

3. Catalyst is specific, which means different chemical reaction may have different catalysts.

4. Just a small amount needed to achieve big increase in rate of reaction. 5. More amount of catalyst used can further increase the rate of reaction. 6. Catalyst in powder form can further increase the rate of reaction.

7. Catalyst may undergo physical change in a reaction.

8. The catalyst does not change the equilibrium constant. But the equilibrium approaches earlier.

9. Catalyst increases the average kinetic energy of molecules.