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WorksheetsAir
Total questions: 20
Worksheet time: 11mins
Which of the following is the active part of air?
Nitrogen
Carbon dioxide
Oxygen
Argon
Which of the following gases when in excess causes global warming?
Oxygen
Nitrogen
Neon
Carbon dioxide
Components of air be separated by ........
Separating funnel
Fractional distillation of liquid air
Use of a magnet
Fractional crystallization
Harmful gases produced in a car engine can be handled by the use of ......
Catalytic converters
Acid scrubbers
Ozone gases
Sulphur containing compounds
Why is argon obtained before oxygen during fractional distillation of liquid air?
Argon is inert
Argon is lighter than oxygen
Oxygen combines with hydrogen to form water
Argon has a lower boiling point than oxygen
Green plants use carbon dioxide for photosynthesis. Animals need oxygen for respiration.
............. is essential for seed germination.
Carbon monoxide
Nitrogen
Oxygen
Carbon dioxide
Mr Kigozi said ' It is colourless, it is odourless & it is a silent killer.' Which gas was he referring to?
Sulphur dioxide
Nitrogen dioxide
Nitrogen
Carbon monoxide
Which of the following are coloured gases?
Nitrogen dioxide
Carbon dioxide
Sulphur dioxide
Chlorine
Which of the following gases is used to quick-freeze food in food factories, and to freeze liquid in cracked pipes before repairing them?
Oxygen
Dry hydrogen
Chlorine
Liquid nitrogen
Which of the following gases doesn't cause acid rain?
Carbon dioxide
Carbon monoxide
Sulphur dioxide
Nitrogen dioxide
Which of the following gases makes up around three-quarters of the air?
Argon
Nitrogen
Carbon dioxide
oxygen
Which of the following describes photosynthesis?
Oxygen reacts with starch to produce carbon dioxide and water.
Carbon dioxide and water react to produce starch and oxygen.
Yeast uses sugar to make carbon dioxide and alcohol
Carbon dioxide turns lime water milky
Which of the following gases is used in advertising signs because it glows red when current is passed through it?
Argon
Helium
Oxygen
Neon
The fumes from the vehicle above are polluting the air. the gas being emitted above is likely to be .......
Carbon dioxide
Sulphur dioxide
Nitrogen dioxide
Ammonia
Why is carbon dioxide removed first during fractional distillation of liquid air? Because ...
carbon dioxide dissolves in water vapour to form carbonic acid.
carbon dioxide is denser than air.
carbon dioxide could freeze later and block the pipes.
carbon dioxide does not support combustion.
Which of the following gases has a characteristic rotten egg smell?
Sulphur dioxide
Hydrogen sulphide
Ammonia
Nitrogen
Why is carbon dioxide used in fire extinguishers?
It doe not support combustion
It is lighter than air
It is readily available
It is denser than air
Which of the following are greenhouse gases?
Methane
Oxygen
Carbon dioxide
Ozone
The form of air pollution shown above is ....
Smog
Acid rain
Dust
Fog
Copper reacts with air when heated to form the black powder shown above. Which of the following gases reacts with the copper.
Hydrogen
Nitrogen
Oxygen
Argon
