Catalysts

A substance that makes chemical reactions faster without changing its structure or concentration (correct)

A substance that increases the concentration of a chemical reaction

A substance that changes its structure during a chemical reaction

A substance that slows down chemical reactions

To increase the concentration of pollutants in the exhaust system

To reduce the amount of pollutants in the exhaust system (correct)

To increase the fuel efficiency of the engine

To increase the speed of the car

Oxygen, nitrogen, and sulfur dioxide

Methane, carbon dioxide, and nitrogen

Carbon monoxide, residual hydrocarbons, and nitrogen oxides

Carbon dioxide, oxygen, and nitrogen (correct)

<p>Platinum, palladium, and rhodium</p> Signup and view all the answers

<p>They are converted into harmless gases</p> Signup and view all the answers

<p>It led to the creation of the catalytic converter</p> Signup and view all the answers