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 role of a catalyst in a chemical reaction?

How does platinum function as a catalyst in car exhaust systems?

Explain the process of oxidation of carbon monoxide in car exhausts.

What are nitrogen oxides and how are they removed from the body?

What reactions are sped up by enzymes in the human body?