Gases in Air, Respiration & Air Pollution

Which gas makes up 21% of the air?

• Argon

• Carbon dioxide

• Nitrogen

• Oxygen

Which one of the following gases is dissolved under pressure in fizzy drinks?

• Argon

• Carbon dioxide

• Carbon monoxide

• Oxygen

Which one of the following pollutant gases is the main cause of acid rain?

• Carbon dioxide

• Carbon monoxide

• Sulphur dioxide

• Methane

Which gas is the main contributor to the problem of global warming?

• CFCs

• Carbon dioxide

• Ozone

• Carbon monoxide

Some advertising signs contain light which makes them more visible and attractive. Which of the following gases produces this light?

• Neon

• Argon

• Helium

• Hydrogen

What is the primary (main) product of respiration?

• Energy

• Glucose

• Food

• CO2

Which of the following is true of exhaled air?

• It contains no oxygen

• It contains only CO2

• It contains more CO2 than inhaled air

• It contains more O2 than inhaled air

Which component of air is very unreactive and is used on oil tankers to reduce the risk of explosion when pumping the oil ashore?

• Carbon dioxide

• Nitrogen

• Oxygen

• Helium

Which gas makes up 78% of the air?

• Oxygen

• Carbon dioxide

• Ozone

• Nitrogen

Which gas in the air is needed for fires to burn?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium