Quiz chemistry

Which of the following is an example of a chemical reaction?

• Metal rusting

• Photosynthesis in plants

• The break down of food into energy

• All of the above

What is the substance produced by a chemical reaction called?

• Product

• Reactant

• Resultant

• Reagent

What kind of chemical reaction involves oxygen and another substance producing water and carbon dioxide?

• Decomposition reaction

• Synthesis reaction

• Combustion

• Single displacement

What kind of chemical reaction is where two substances combine to make a new substance?

• Synthesis reaction

• Decomposition reaction

• Combustion

• Single displacement

What kind of chemical reaction can be represented by the equation A + BC ---> AC + B?

• Synthesis reaction

• Decomposition reaction

• Combustion

• Single displacement

What kind of chemical reaction is where one substance is broken down into two substances?

• Synthesis reaction

• Decomposition reaction

• Combustion

• Single displacement

What does a catalyst do to a chemical reaction?

• Stops the reaction

• Starts the reaction

• Speeds up the rate of reaction

• Slows down the rate of reaction

How many molecules are in this chemical formula?

• 4 molecules

• 2 molecules

• 6 molecules

• 5 molecules

How many oxygen atoms are in this chemical formula?

• 6

• 3

• 2

• 4

Is this balanced?

2HgO → 2Hg + O₂

• Yes

• No

• Maybe

• Ask God