S2 Chemical Reactions Quiz

What is a chemical reaction?

• A process that forms new substances

• When one state of matter changes to another e.g. ice melting and turning to liquid water

• A process that never changes substances

Which of the following is NOT a sign of a chemical reaction?

• Colour change

• Gas production

• Solid production

• Sound production

What type of reaction takes in heat energy and feels cold?

• Exothermic

• Endothermic

• Combustion

• Neutralisation

What happens in an exothermic reaction?

• Heat is absorbed

• Heat is released

• No heat change

• Heat is created from nothing

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

• Melting ice

• Lighting a match

• Breaking glass

• Freezing water

What is a characteristic of a physical change?

• A new substance is formed

• It cannot be reversed

• It involves a change in state

• It always produces heat

What is a material made up of one kind of atom called?

• Compound

• Mixture

• Element

• Solution

What is a compound made from?

• One kind of atom

• Two or more different elements chemically joined together

• A single element

• A mixture of gases

What do compounds ending in -ide contain?

• Three elements

• Two elements

• Four elements

• One element

Which element is always present in compounds ending in -ate?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon