Catalysis

The video explains the role of catalysts in chemical reactions, highlighting their ability to lower activation energy and increase reaction rates. It covers different types of catalysis, including homogeneous and heterogeneous, and discusses the adsorption theory. The video also explores enzyme catalysis and the use of catalysts in industrial processes, emphasizing their selectivity and efficiency.

What is the primary role of a catalyst in a chemical reaction?

• To alter Gibbs Energy

• To increase the activation energy

• To decrease the activation energy

• To change the equilibrium constant

Which of the following is an example of homogeneous catalysis?

• Hydrogenation of ethene using nickel

• Conversion of sulfur dioxide to sulfur trioxide in presence of nitric oxide

• Oxidation of sulfur dioxide using platinum

• Decomposition of potassium chlorate with manganese dioxide

What is the main difference between homogeneous and heterogeneous catalysis?

• The color of the reactants

• The phase of reactants and catalysts

• The temperature of the reaction

• The pressure of the reaction

What is the significance of zeolites in catalysis?

• They alter the color of the products

• They are used to decrease the pressure of reactions

• They provide a shape-selective catalytic environment

• They are used to increase the temperature of reactions

How do enzymes act as catalysts in biochemical reactions?

• By changing the pH of the reaction

• By altering the reactants' molecular structure

• By providing an alternate reaction pathway

• By increasing the temperature of the reaction

What is the lock and key mechanism in enzyme catalysis?

• Enzymes change shape to fit any substrate

• Enzymes and substrates have complementary shapes

• Enzymes unlock the substrate for other reactions

• Enzymes lock the substrate in place permanently

Which condition is NOT optimal for enzyme activity?

• High temperature

• Specific pH range

• Presence of coenzymes

• 37 degrees centigrade

What role do enzyme inhibitors play in the body?

• They change the enzyme's structure

• They decrease or stop enzyme activity

• They enhance enzyme activity

• They increase the temperature of reactions

Which enzyme converts glucose into ethyl alcohol?

• Invertase

• Diastase

• Zymase

• Maltase

What catalyst is used in the Haber process?

• Vanadium pentoxide

• Platinum

• Iron with molybdenum

• Nickel