Air and Atmosphere

The diagram shows some steel wool inside a test tube. The test tube is inverted in a trough of water, trapping air inside. What is the water level in the test tube after many days?

• A

• B

• C

• D

Which of the following gases is produced in significant amounts when a volcano erupts?

• carbon monoxide

• methane

• nitrogen oxide

• sulfur dioxide

Which of the following is true about carbon monoxide?

• It causes acid rain.

• It is formed during incomplete combustion of fossil fuel.

• It is produced during respiration.

• It prevents the haemoglobin from carrying oxygen to cells.

Which of the following processes contribute to increased amounts of greenhouse gases in the atmosphere?

1. 1 - cattle farming, 2 - combustion of fuels, 3 - decomposition, 4 - photosynthesis

• 1, 2 and 3 only

• 2 and 3 only

• 2 and 4 only

• All of the above

An experiment was conducted using the following apparatus. Syringe A contained 100 cm3 of air and syringe B started empty. The air was then pushed to and fro the copper powder in the glass tube using the syringes. What would be the final volume of air in the set-up after no further reaction takes place?

• 20 cm3

• 50 cm3

• 80 cm3

• 100 cm3

Which processes releases carbon dioxide into the atmosphere?

• Respiration

• Photosynthesis

• Decomposition

• Combustion

A sample of air was passed through the following set-up. The anhydrous copper(II) sulfate turned blue, a white precipitate was observed in the limewater, and the acidified potassium manganate(VII) turned colourless. Which set of gases was present in the sample of air?

• carbon dioxide, oxygen and nitrogen

• carbon dioxide, sulfur dioxide and water vapour

• carbon monoxide, nitrogen and sulfur dioxide

• carbon monoxide, nitrogen dioxide and sulfur dioxide

Which of these processes produce pollutants that cause acid rain?

• combustion of fuels in car engines

• lightning activity

• volcanic eruption

Which two gases do not react with limestone?

• nitrogen and carbon monoxide

• nitrogen dioxide and carbon dioxide

• nitrogen dioxide and carbon monoxide

• sulfur dioxide and carbon dioxide

Carbon monoxide, oxides of nitrogen and sulfur dioxide are common air pollutants. Which of the following correctly shows the pollutant, its source and effect on the environment?

• A

• B

• C

• D