If copper oxide is added to sulfuric acid, copper sulfate and water is made. What are the reactants in this reaction? (more than one answer)

• copper oxide

• sulfuric acid

• copper sulfate

• water

If copper oxide is added to sulfuric acid, copper sulfate and water is made. What are the products in this reaction? (more than one answer)

• copper oxide

• sulfuric acid

• copper sulfate

• water

If black copper oxide is added to colourless sulfuric acid, blue copper sulfate and colourless water are made and the temperature has increased. How do we know that a chemical reaction has occurred? (may be more than one answer)

• the smell stays the same

• the temperature changes

• the water turns into a gas

• the colour changes

Is this equation balanced?

• yes

• no

• maybe

Which of these is the correct balanced equation?

• Fe2O3 + 2C ------ 2Fe + 2CO2

• 2Fe2O3 + 3C ------ 4Fe + 3CO2

• Fe2O3 + 3C ------ 2Fe + 3CO2

• 2Fe2O3 + 2C ------ 2Fe + 2CO2

Which number represents the reaction when an enzyme is used?

• 1

• 2

• 3

• 4

What kind of reaction does this graph show?

• no reaction

• activated reaction

• endothermic reaction

• exothermic reaction

In an exothermic reaction, what will happen to the temperature of the surrounding environment?

• it will get hotter

• it will get colder

• it will stay the same

Which of these statements are correct (more than one answer)

• 1 = product

• 4 = active site

• 3 = active site

• 2 = reactant

• 1 = reactant

Which of these statements about enzymes is INCORRECT?

• enzymes speed up chemical reactions in organisms

• each enzyme is specific to one reactant/s

• enzymes are biological catalysts

• enzymes are a part of the chemical reaction