CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Theories of Catalysis

A catalyst ei...

Question

A catalyst either increases or decreases the rate of a chemical change and at the end of the reaction.

Open in App

Solution

A catalyst is a substance that increases the rate of a chemical reaction by reducing the activation energy , but which is left unchanged by the reaction.
A piece of platinum foil is a catalyst for the combustion of methane in air.

Suggest Corrections

thumbs-up

0

Similar questions

Complete the following statements:

(a) The chemical change involving iron and hydrochloric acid illustrates a ___ reaction.

(b) In the type of reaction called ___ two compounds exchange their positive and negative redicals.

(c) A catalyst either ___ or ___ the rate of a chemical change but itself remains ___ at the end of the reaction.

Q. Assertion :Catalyst is a substance which takes part in a chemical reaction, undergoes chemical change and alters the rate of a reaction Reason: Catalyst is a substance which does not take part in a chemical reaction, but changes the rate of reaction

Q. Assertion :A catalyst increases the rate of reaction without itself undergoing any permanent chemical change. Reason: A catalyst changes the Gibbs energy

(△ G)

of the reaction and equilibrium constant of the reaction.

27^{o} C

of a chemical reaction increases

1000

times when a suitable catalyst is introduced. Calculate the change in the energy of activation that the catalyst has brought in.

A catalyst increases the rate of forward reaction and decreases the rate of backward reaction.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Theories of Catalysis

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Theories of Catalysis

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon