CO2 Review

Which is not a property of carbon dioxide?

• It is a colorless gas

• It supports combustion

• It is denser than air

• It is an odorless gas

Which is a use of carbon dioxide

• used in respiration

• used for life support

• used in fire extinguishers

• used to make fertilizers

Carbon dioxide is a:

• compound

• element

• mixture

• molecule

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The processes that return carbon dioxide into the atmosphere are:

• combustion

• decomposition

• photosynthesis

• respiration

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how many atoms make up a molecule of carbon dioxide ( CO₂)?

• 1

• 2

• 3

• 4

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Which are properties of carbon dioxide?

• Carbon dioxide is lighter than air

• Carbon dioxide is slightly soluble in water

• Carbon dioxide supports photosynthesis

• Carbon dioxide does not support combustion

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Which two substances are combined to make carbon dioxide in the lab?

• hydrochloric acid and calcium carbonate

• hydrochloric acid and calcium chloride

• water and calcium chloride

• water and carbon dioxide

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Which substance is used to prove that an unknown gas is carbon dioxide?

• a glowing splint

• hydrogen gas

• plain drinking water

• lime water

What is the name of this piece of lab equipment?

• a beaker

• a graduated cylinder

• a flask

• a test tube

Carbon dioxide is added to soft drinks like Coca-cola and Sprite. Why is this done?

• To improve the flavor

• To make the drink interesting

• To ensure that the drink is free of bacteria

• To add bubbles to the drink