Chemistry Quiz

Why does paper get lighter when it burns?

• Because it turns into water

• Because it disintegrates into smaller particles that are not visible

• Because it undergoes a physical change

• Because it is replaced by heavier materials

What does a pH of 13 tell us about a chemical?

• It is strongly acidic

• It is neutral

• It is weakly basic

• It is strongly basic

What does a red color on the pH scale tell us?

• The substance is neutral

• The substance is basic

• The substance is acidic

• The substance is a pure element

What is the name of the product in the reaction of iron + oxygen → iron oxide?

• Iron sulfate

• Iron oxygenate

• Iron hydroxide

• Iron oxide

What happens when lead and oxygen combine?

• They mix to form a mixture.

• They dissolve into each other.

• They react to form a new product with different properties.

• They separate into their basic elements.

What is the product formed when lead reacts with oxygen?

• Lead sulfate

• Lead carbonate

• Lead oxide

• Lead nitrate

What are "Reactants" in a word equation?

• The chemicals that are produced

• The end result of a chemical reaction

• The chemicals that go into the reaction

• The process of combining chemicals

What are "Products" in a word equation?

• The initial substances in a reaction

• The outcome of a physical change

• The chemicals that are produced

• The method used to produce chemicals

What is the product formed when lead reacts with oxygen according to the word equation provided?

• Lead hydroxide

• Lead carbonate

• Lead sulfate

• Lead oxide

What are the products when limestone (calcium carbonate) is heated?

• Calcium oxide and water

• Calcium oxide and carbon dioxide

• Calcium chloride and carbon dioxide

• Calcium carbonate and hydrogen