Enzymes Large number of organic reactions are taking place in the body of animals and plants to maintain the life processes. These reactions are catalysed by complex nitrogenous organic compounds known as enzymes. These are also called biological catalysts or biochemical catalysts and are produced by the living cells in plants and animals. Thus, enzymes are biological … [Read more...] about Enzyme Catalysis
Class 12
Mechanism of Homogeneous and Heterogeneous Catalyst
Mechanism of Homogeneous Catalytic Reactions The catalyst combines with one of the reactants to form an intermediate. Intermediate compound being unstable either decomposes or combines with the other reactant form the product and the catalyst is regenerated. For Example: the combination of SO2 and O2 to form SO3 is a slow process. However, in the presence of NO (catalyst) … [Read more...] about Mechanism of Homogeneous and Heterogeneous Catalyst
Modern Adsorption Theory and Features of Solid Catalyst
Adsorption Theory The surface of the catalyst has free valencies which provide sites for chemical forces of attraction. The reactants in the gaseous state or in solution are adsorbed on the surface of the solid catalyst. As the reactant molecules are adsorbed, its bonds are weakened and the reaction can proceed quickly because the bonds are more quickly broken. For … [Read more...] about Modern Adsorption Theory and Features of Solid Catalyst
Catalysis and Classification of Catalyst
Catalysis A substance which increases the speed of a reaction without being consumed in the reaction is called a catalyst. The phenomenon of increasing the rate of reaction by the use of catalyst is called catalysis. Living cells contain thousands of different kinds of proteins called enzymes which act as catalysts. A catalyst provides an entirely new path for the reaction … [Read more...] about Catalysis and Classification of Catalyst
Application of Adsorption
Applications of Adsorption Some of the important applications of adsorption are given below: 1) In gas masks Activated charcoal or a mixture of adsorbents is generally used in gas masks to adsorb poisonous and toxic gases from air. These masks are commonly used by the miners because there are poisonous gases like CO, CH4 etc. in the atmosphere in the coal mines. … [Read more...] about Application of Adsorption