Question

The substance in whose presence the rate of a chemical reaction changes without causing any chemical change to it *

Answer 1

In the presence of a catalyst, the rate reaction changes without causing any chemical change to it.

• Catalysts are known for their ability to increase the rate of reaction without causing any chemical change. They do not involve in the reaction process.
• A reaction can be catalyzed using a small quantity of catalyst. An increase in the quantity of catalyst does not increase the rate of reaction further.
• Catalysts are highly specific for a particular reaction.