Question
Fri April 18, 2014 By: Harsha Chelva

What is the meaning of catalyst?

Why should we water a cememted building.give the chemical equation?

what is the difference between oxidizing agent and oxidised ?Explain with examples.

 

Expert Reply
Sun April 20, 2014
Dear Harsha

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

In case of multiple questions within a query, please post each question individually and let us know where you are getting stuck so that we would be able to explain things better.
 
However answer to your first query is,

Catalyst means a substance that raises the rate of a chemical reaction without itself undergoing any permanent chemical change.

In other words,

The catalysts are called as the chemical activators which do not get involved in the product formation, but their presence causes a reaction to occur faster.

Ex: some metals like; Ni (nickel), Pt (Platinum), Fe (Iron) etc, or chemical compounds like alcohols, KMnO4etc.

Regards,

Topperlearning Team.
Home Work Help