WorksheetsPROPERTIES AND USES OF AIR GASES
Total questions: 13
Worksheet time: 7mins
The percentage composition of oxygen in air is
20%
21%
22%
23%
Oxygen is important on earth because it is essential for the life of
animals
plants
fungi
animals,plants and fungi
Combustion cannot take place without
water
nitrogen
helium
oxygen
Properties of oxygen gas is
colourless
tasteless
odourless
all of the these
What are the properties of air?
It occupies space
It is present everywhere around us
It has no colour and is transparent
All of the above
The composition of nitrogen gas in the atmosphere is
77%
78%
78%
79%
Oxygen is a supporter of
combustion
photosynthesis
smoke
dust
The two gases which together make up about 99 per cent of the air are
oxygen and carbon dioxide
oxygen and nitrogen
carbon dioxide and nitrogen
nitrogen and water vapours
Air is considered to be
element
compound
mixture
a solvent
Mountaineers carry oxygen cylinder with them because
there is no oxygen on high mountains
there is deficiency of oxygen on mountains at high altitude
oxygen is used for cooking
oxygen keeps them warm at low temperature
Which components of air are harmful to living organisms?
Nitrogen and oxygen
Oxygen and carbon dioxide
Smoke and dust
Smoke and water vapors
Which of the following gas is used for breathing?
Nitrogen
Carbon dioxide
Oxygen
Helium
Which components of air are harmful to living organisms?
Nitrogen and oxygen
Dust and smoke
Oxygen and carbon dioxide
Smoke and water vapours
