Y8 Chemical Reactions

What are the substances called that react together in a chemical reaction?

• Elements

• Compounds

• Products

• Reactants

In a chemical reaction, the total mass of reactants compared to the total mass of products is:

• Greater

• Unpredictable

• Lesser

• Equal

What does a word equation represent in a chemical reaction?

• The reactants and products

• The physical state of reactants and products

• The temperature change during the reaction

• The conservation of mass

What is the result of an incomplete combustion?

• Carbon dioxide + Water

• Oxygen + Water

• Carbon monoxide + Water

• Carbon + Water

What type of reaction takes in heat from the surroundings?

• Exothermic reaction

• Endothermic reaction

• Oxidation reaction

• Reduction reaction

What is formed in a precipitation reaction?

• An insoluble solid

• A liquid

• A soluble solid

• A gas