Catalyst

Catalysts are substances that speed up chemical reactions without being consumed. Platinum is used in car exhausts to accelerate the oxidation of harmful substances. Enzymes are natural catalysts that facilitate cellular reactions in the human body.

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

• To speed up the reaction without being consumed

• To change the products of the reaction

• To provide energy to the reactants

• To increase the temperature of the reaction

Which metal is commonly used as a catalyst in car exhaust systems?

• Copper

• Silver

• Gold

• Platinum

What role does platinum play in car exhaust systems?

• It speeds up the oxidation of harmful substances

• It reduces the temperature of the exhaust gases

• It increases the fuel efficiency

• It changes the color of the exhaust gases

What are enzymes primarily responsible for in the human body?

• Slowing down cellular reactions

• Providing energy to cells

• Changing the structure of cells

• Speeding up cellular reactions

How do enzymes differ from synthetic catalysts?

• Enzymes are naturally occurring

• Enzymes are used in car exhausts

• Enzymes slow down reactions

• Enzymes are consumed in reactions