Science - Pollution of Air and Water
Exam Duration: 45 Mins Total Questions : 30
The pie chart given below shows the composition of different gases in air.
Identify gases W, X and Y.
- (a)
W X Y Nitrogen Rare gases Oxygen - (b)
W X Y Carbon Oxygen Rare gases - (c)
W X Y Nitrogen Oxygen Rare gases - (d)
W X Y Rare gases Hydrogen Oxygen
Which of the following does NOT cause air pollution?
- (a)
Increasing forest reserves
- (b)
Using pesticides in farms
- (c)
Developing housing estates
- (d)
Quarrying for limestone
Which of the following is NOT a general pollutant of atmosphere?
- (a)
CO2
- (b)
S02
- (c)
S03
- (d)
N02
Identify the gas associated with greenhouse effect
- (a)
Carbon dioxide
- (b)
Oxygen
- (c)
Nitrogen dioxide
- (d)
Sulphur dioxide
What is the outcome of the release of carbon particles and smoke from factories?
- (a)
Increases the rate of respiration in plants.
- (b)
Decreases the rate of photosynthesis in plants.
- (c)
Increases the absorption of carbon dioxide by plants.
- (d)
Decreases the rate of transpiration in plants
Which of the following gases can result in the formation of acid rain?
- (a)
Ozone
- (b)
Carbon monoxide
- (c)
Sulphur dioxide
- (d)
Chlorofluorocarbon
Heat is reflected from the earth's surface and trapped in the atmosphere. Which phenomena is being referred to?
- (a)
Global warming
- (b)
Ozone depletion
- (c)
Greenhouse effect
- (d)
Thermal pollution
Which of the water pollutants is INCORRECTLYpaired with the source?
- (a)
Oil spill - ship
- (b)
Pesticide - oil palm plantation
- (c)
Sewage - factories
- (d)
Nitrate - farm
Which of the following gases is regarded as an atmospheric pollutant?
- (a)
O2
- (b)
03
- (c)
S02
- (d)
N2
What is the effect of sulphur dioxide present in air on human beings
- (a)
Harms the skin and the lungs
- (b)
Mixes with the blood and prevents e it from carrying oxygen
- (c)
Affects the heart and the liver
- (d)
Raises the air temperature
How are lead particles released into the air?
- (a)
By burning coal in thermal power stations
- (b)
By burning petrol in automobiles
- (c)
By burning biomass in chullahs
- (d)
By burning LPG for cooking
From which of the following bad effects e does the ozone layer in our atmosphere protect us?
- (a)
Carbon dioxide
- (b)
CFC's
- (c)
The sun's ultraviolet rays
- (d)
All of the above
How are monuments of marble destroyed?
- (a)
By sulphur dioxide pollution.
- (b)
By carbon monoxide pollution.
- (c)
By pesticide pollution.
- (d)
By dust particles
Which of the major sources of air pollution contributes pollutants like chlorofluorohydrocarbons?
- (a)
Industrial effluents
- (b)
Aerosols
- (c)
Sewage pollutants
- (d)
All of the above
Which of the following applications use catalytic converters?
- (a)
Automobiles
- (b)
Wind mills
- (c)
Poultry farms
- (d)
Dairy farms
What is smog?
- (a)
A combination of fire and water.
- (b)
A combination of smoke and fog.
- (c)
A combination of water and smoke.
- (d)
A combination of air and water
If there is no CO2 in the atmosphere, what would happen to the earth's temperature?
- (a)
It would be less than the present.
- (b)
It would be the same as present .
- (c)
It would be higher than the present.
- (d)
It depends on the 02 content of air .
Which of the following is NOT a feature of potable water?
- (a)
Clean, colourless and odourless
- (b)
Free from bacteria
- (c)
Have excessive sodium, calcium and magnesium
- (d)
Having dissolved oxygen and carbon dioxide
Which of the following pollutants is NOT present in the vehicular exhaust emissions?
- (a)
Lead
- (b)
Ammonia
- (c)
Carbon monoxide
- (d)
Particulate matter
What is the main cause of pollution of water in India?
- (a)
Discharge of untreated sewage
- (b)
Bathing
- (c)
Discharge of industrial waste
- (d)
Both (A) and (C)
In which part of atmosphere is ozone layer present?
- (a)
Stratosphere
- (b)
Troposphere
- (c)
Mesosphere
- (d)
Thermosphere
Which of these steps when adopted will contribute towards better waste management?
- (a)
Reduce the amount of waste formed
- (b)
Reuse the waste
- (c)
Recycle the waste
- (d)
All of the above
Which of the followinq, will NOT help in reducing air pollution?
- (a)
Burn household rubbish in incinerators.
- (b)
Use catalytic converters in motor vehicles.
- (c)
Fix electric precipitators to factory chimneys
- (d)
Ban smoking in public places such as in cinema theatres
Which of the following is due to global warming?
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i) (ii) and (iii)
Which of these is the bio-indicator of air pollution?
- (a)
Algae
- (b)
Ferns
- (c)
Mushrooms
- (d)
Lichens
What does the term 'conservinq the environment' mean?
- (a)
Not allowing man and animal from using natural resources
- (b)
Not lowering the quality of the environment
- (c)
Changing natural resources from their original state
- (d)
Preserving nature that has been destroyed
How can pollution from the burning of fossil fuels be reduced?
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i) (ii) and (iii)
How is sewage water purified for recycling?
- (a)
By the action of fish.
- (b)
By the action of microorganisms.
- (c)
By the action of fuels.
- (d)
By the action of non-biodegradable chemicals.
What are the effects of discharging excess heat from electrical power stations into rivers and lakes?
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i), (ii) and (iii)
- (d)
Only (i), (ii) and (iv)
Which of the following is NOT an air pollutant?
- (a)
N2
- (b)
N2O
- (c)
NO
- (d)
CO
