Catalysis

What is the main effect of negative catalysis in a chemical reaction?

• It changes the reaction's equilibrium.

• It has no effect on the reaction rate.

• It increases the reaction rate.

• It decreases the reaction rate.

Which type of catalysis involves the catalyst and reactants being in different phases?

• Heterogeneous catalysis

• Homogeneous catalysis

• Enzyme catalysis

• Induced catalysis

In what scenario does autocatalysis occur?

• When the product of the reaction acts as a catalyst

• When temperature increases

• When pressure decreases

• When a catalyst is added externally

What is the primary effect of positive catalysis in a chemical reaction?

• It increases the reaction rate.

• It changes the reaction's equilibrium.

• It has no effect on the reaction rate.

• It decreases the reaction rate.

What role do enzymes play in biological systems?

• They are biological catalysts that speed up reactions.

• They have no effect on reaction rates.

• They act as inhibitors in all reactions.

• They are only involved in metabolic pathways.

Which of the following is used as a catalyst in the haber process?

• V₂O₅

• Fe

• Ag₂O

• SO₃

How does a catalyst work in speeding up a reaction?

• by lowering the activation energy or reaction

• by giving them more energy

• by making them more available

• by increasing the activation energy or reaction

A substance that increases the rate of a reaction without being used up during the reaction is called a

• catalyst

• product

• reactant

• solute