Science Dictionary » Index C

Example of Catalyst

djeet — Tue, 22 Sep 2009 17:49:44 +0000

Example of Catalyst : Decomposition of Potassium chlorate is a slow process which occurs in temperature range of 653-873 K. But when manganese dioxide is added, the rate of reaction increases and decomposition occurs at 473-633 K. In this reaction, manganese dioxide acts as a Catalyst.

Definition of Class

aman — Thu, 03 Sep 2009 15:35:13 +0000

A Class is a group of objects that share common properties and relationship. Defining a Class does not perform any memory allocation. A Class is like a blueprint for a House, that blueprint gives the specifications of the house, and based on it many houses can be constructed.

Definition of Catalysis

djeet — Sat, 22 Aug 2009 12:58:16 +0000

Catalysis is the process in which catalyst is used to alter the rate of chemical reaction.

Catalysis can be broadly divided into two groups :

Definition of Catalyst

djeet — Sat, 22 Aug 2009 11:06:27 +0000

The term ‘catalyst‘ was suggested by Berzelius in 1935. Catalysts are substances which alter the rate of chemical reaction and remain chemically and quantitatively unchanged after the reaction.

Based on whether a catalyst increases or decreases the rate of chemical reaction, it is classified as :

Positive Catalyst
Negative Catalyst