Question

Which of the following is true about catalysts?

A Catalysts increase the number of collisions that occur between reactants.
B Catalysts increase the activation energy by forming new reactants.
C Catalysts reduce the potential energy of the compounds that are produced.
D Catalysts reduce the energy needed for the reaction to take place.

Answer 1

Answer: Option (D) is the correct answer.

Step-by-step explanation:

A catalyst is defined as the substance which lowers the activation energy of a chemical reaction without itself getting consumed in the reaction so that there will be increase in rate of reaction.

As catalyst, basically lowers the activation energy so that reactant molecules with lower energy can also participate in the reaction. Hence, more number of collisions can occur due to which there is rapid formation of products.

Thus, we can conclude that the statement catalysts reduce the energy needed for the reaction to take place, is true about catalysts.

Answer 2

D

Step-by-step explanation:

Catalysts lower the activation energy of the reactants so the reaction proceeds faster than naturally. The catalyst does not change the reaction (the potential energy of the reaction remains the same) in any other way and is not caused by the reaction.