Science 24 - Chapter 2 Quiz

Which of the following is evidence that a chemical reaction has occurred?

• there is a change of state

• a new substance is produced

• no new substances are formed

• none of the above

What type of reaction is the following?

gasoline (FUEL) + oxygen ---> carbon dioxide + water + energy

• combustion

• neutralization

• energy

• decomposition

Which of the follow is NOT an example of a chemical reaction?

• Using baking soda and vinegar to make a toy volcano

• Rusting of a metal

• Burning of firewood

• Leaves changing colour in the fall

Use the following reaction to answer the question.

Fuel + oxygen ---> carbon dioxide + water + energy

• It releases energy and is endothermic

• It absorbs energy and is endothermic

• It releases energy and is exothermic

• It absorbs energy and is exothermic

When you have an upset stomach you will sometimes take an antacid. The antacid contains magnesium hydroxide which reacts with your stomach acid to produce water and salt. What type of reaction is this?

• combustion

• neutralization

• energy

• decomposition

Which of the following is true about a reaction that needs energy to happen?

• It releases energy and is endothermic.

• It absorbs energy and is endothermic.

• It releases energy and is exothermic.

• It absorbs energy and is exothermic.

Use the following reaction to answer the question.

Acid + Base --> Water + Salt.

The water and the salt would be classified as what?

• Products

• Energy

• Waste Material

• Reactants

What two products are present in a Combustion Reaction?

• Carbon Dioxide and Water

• Water and Fuel

• Energy and Carbon Dioxide

• Fuel and Oxygen

Boiling water so it changes from a liquid to a gas is an example of a Chemical Reaction.

• True

• False

Select ALL that are correct!! (You may select MORE than ONE answer... then submit)

Which of the following is evidence that a chemical reaction has occurred?

• change in colour

• gives off heat

• precipitate formed

• smell of a gas present