Chemical Changes

What are the products of cellular respiration?

• carbon dioxide and oxygen
• carbon dioxide and water
• oxygen and glucose
• glucose and carbon dioxide

Name the gas that must be present for combustion to take place.

• carbon dioxide
• hydrogen
• oxygen
• nitrogen

For electrolysis of water to take place what must be present?

• oxygen
• light
• heat
• electricity

Rusting is an example of a/an _______ reaction.

• photosynthesis
• oxidation
• thermal decomposition
• elctoplating

What is the reaction called when sugar is heated?

• thermal decomposition
• combustion
• electrolysis
• electroplating

what are the products of photosynthesis?

• water and carbon dioxide
• oxygen and water
• carbon dioxide and glucose
• oxygen and glucose

What are the products of acid and base?

• salt and hydrogen gas
• salt and carbon dioxide gas
• salt and water
• water and hydrogen gas

Name the gas when magnesium reacts with hydrochloric acid.

• oxygen
• carbon dioxide
• nitrogen
• hydrogen gas

How do you test for hydrogen gas and what would you observe?

• burning spling;'pop' sound
• glowing splint; 'pop' sound
• limewater; turns into a white percipitate
• limewater; remians clear

Name the gas when calcium carbonate reacts with sulfuric acid.

• oxygen
• hydrogen
• carbon dioxide
• nitrogen