Catalyst - QS Study
QS Study

Mechanism of Enzyme Catalysis

Mechanism of Enzyme Catalysis The substance on which the enzyme acts is called the substrate. The enzyme molecule is a protein chain that acquires a......

Characteristic Properties of Enzyme Catalysis

Characteristic Properties of Enzyme Catalysis Enzymes have a number of characteristic properties that make them efficient and specific catalysts for many biological reactions. Enzyme catalysis......

Enzyme Catalysis

Enzyme Catalysis Many chemical reactions associated with living organisms are accelerated by a group of closely related substances called enzymes. Enzymes play a dominant role......

Mechanism of Acid-Base Catalysis

Mechanism of Acid-Base Catalysis The addition of proton or its removal must be associated with acid-base catalysis; this is because for most cases an acid......

Acid-Base Catalysis

Acid-Base Catalysis Many organic reactions in solution are known to be catalyzed by acids or bases or both. These reactions form an important class of......

Catalytic Hydrogenation of Ethylene

Catalytic Hydrogenation of Ethylene The five steps are illustrated in figure for the catalytic hydrogenation of ethylene to form ethane using finely divided nickel catalyst.......

Experiment Explanation by Catalytic Adsorption Theory

Experiment Explanation by Catalytic Adsorption Theory The adsorption theory satisfactorily explains the following: (i) The specific nature of the catalyst and the change in the......

Role of Promoters in Catalyst Adsorption

The role of promoters in Catalyst Adsorption A small quantity of promoter is sufficient to increase the activity of the catalyst to a large extent.......

Intermediate Compound Theory of Mechanism of Catalysis

Intermediate compound theory: The essential feature of the theory is that the catalyst chemically combines with one of the reactants to form an unstable active......

Adsorption Theory of Mechanism of Catalysis

Adsorption theory: This theory can be applied to heterogeneous catalysis only. As the name suggests the reactant is adsorbed on the surface of the catalyst......

Catalytic Promoter

Catalytic promoter: Promoters are substances which when mixed with the catalyst increases its catalytic activity. These substances themselves are not catalysts for the reaction. A......

Catalytic Poisons

Catalytic poisons: Substances which, in their presence, reduce the catalytic activity of a catalyst are called catalytic poisons. According to the collision theory, a reaction......