Chemistry: Carbon Dioxide

What does CO₂ stand for?

• Carbon dioxide

• Carbon Oxide

• Calcium Dioxide

• Carbonate

In the atmosphere, carbon exists in the form of...

• Coal

• Carbon dioxide only

• Carbon monoxide only

• Carbon monoxide only

What kind of gases are carbon dioxide and methane?

• Poisonous

• Repairing

• Deadly

• Greenhouse

This factor contributes to the carbon cycle.

• fossil fuel combustion

• Respiration

• photosynthesis

• All of the above

The role of bacteria in the carbon cycle is...

• Chemosynthesis

• Photosynthesis

• Breakdown of organic compound

• None of the above

Respiration and photosynthesis are central to this process.

• nitrogen cycle

• carbon cycle

• sulphur cycle

• None of the above

Silicon dioxide is also called...

• silicon oxide

• Silica

• silicate

• siliconic oxide

What is the thermal decomposition of copper carbonate?

• CuCO3 → CuO + CO2

• CH4 + 2O2 → CO2 + 2H2O

• C5H12 + 8O2 → 5CO2 + 6H2O

• C6H12 + 9O2 → 6CO2 + 6H2O

What does an increase in carbon dioxide and methane cause?

• More people catching colds

• Increase in global temperature

• Fish dying faster

• Earth moves closer to the sun

A greenhouse gas that absorbs energy and maintains the earth's temperature is...

• oxygen

• nitrogen

• carbon dioxide

• Argon