SAT Biology - Air and Water Pollution
Exam Duration: 45 Mins Total Questions : 30
__________ are used in electrostatic precipitators.
- (a)
Catalysts
- (b)
Absorbers
- (c)
Electrodes
- (d)
Chemicals
_________ is the first step of sewage treatment.
- (a)
Precipitation
- (b)
Chlorination
- (c)
Sedimentation
- (d)
Aeration
World Environment Day is celebrated every year on ________
- (a)
5th March
- (b)
15th April
- (c)
15th May
- (d)
5th June
We and our surroundings together are called
- (a)
Environment
- (b)
Atmosphere
- (c)
Lithosphere
- (d)
Hydrosphere
Which method is used for the removal of sulphur dioxide and ammonia from the polluted air?
- (a)
Wet scrubbers
- (b)
Absorption
- (c)
Gravitational method
- (d)
Electrostatic precipitator
BOD is _______ in polluted water and _______ in potable water
- (a)
More, less
- (b)
Less, medium
- (c)
Medium, more
- (d)
Less, more
Today, the world's number one problem is
- (a)
Pollution
- (b)
Population explosion
- (c)
Nuclear proliferation
- (d)
Natural calamities
Which of the following is a problem not associated with population growth?
- (a)
Increased resource consumption
- (b)
Environmental pollution
- (c)
Food and energy storages
- (d)
None of the above
This may be used as refrigerator:
- (a)
CFC
- (b)
Carbon
- (c)
Acids
- (d)
Ozone
The number of babies produced per thousand individuals is called:
- (a)
Natality
- (b)
Mortality
- (c)
Immigration
- (d)
Emigration
Which of the following is not a solution of global warming?
- (a)
Reducing fossil fuel consumption
- (b)
Planting more trees
- (c)
Deforestation
- (d)
None of the above
Which of the following is not a 'greenhouse gases'?
- (a)
Oxygen
- (b)
Carbon dioxide
- (c)
Chlorofluorocarbons
- (d)
Methane
The greenhouse effect is due to:
- (a)
Penetrability of low wavelength radiations through O3 layer
- (b)
Impermeability of long wavelength radiations through CO of the atmosphere
- (c)
Penetrability of low wavelength radiations through CO
- (d)
Impermeability of long wavelength radiations through O3 layer
The primary cause of acid rain around the world is:
- (a)
Carbon dioxide
- (b)
Sulphur dioxide
- (c)
Carbon monoxide
- (d)
Ozone
Acid rain is caused by increase in the atmospheric concentration of:
- (a)
Ozone and dust
- (b)
SO and NO
- (c)
SO and CO
- (d)
CO and CO
The primary air pollutant responsible for acid rains is:
- (a)
Carbon dioxide
- (b)
Sulphur dioxide
- (c)
Carbon monoxid
- (d)
Ozone
Ozone layer is present in
- (a)
Troposphere
- (b)
Mesosphere
- (c)
Stratosphere
- (d)
Thermosphere
The ultraviolet radiations in the stratosphere are absorbed by:
- (a)
Oxygen
- (b)
Ozone
- (c)
Sulphur dioxide
- (d)
Argon
Ozone depletion in the stratosphere will cause:
- (a)
Forest fires
- (b)
Increased incidence of skin cancer
- (c)
Global warming
- (d)
None of these
Nitrogen oxide and hydrocarbons released by automobiles interact to form
- (a)
Sulphur dioxide
- (b)
Carbon monoxide
- (c)
PAN
- (d)
Aerosols
The first CFC was synthesised in:
- (a)
1892
- (b)
1920
- (c)
1980
- (d)
1800
A natural phenomenon that becomes harmful due to pollution is __________
- (a)
Global warming
- (b)
Ecological balance
- (c)
Greenhouse effect
- (d)
Desertification
The pollutant responsible for ozone holes is _______
- (a)
CO2
- (b)
SO2
- (c)
CO
- (d)
CFC
Animal dung is ________ waste
- (a)
Biodegradable
- (b)
Non-biodegradable
- (c)
Hazardous
- (d)
Toxic
Which of the following is biodegradable?
- (a)
Iron nails
- (b)
Plastic mugs
- (c)
Leather belts
- (d)
Silver foil
Harmful U.V. radiations emanating from the sun are prevented from reaching the Earth by the presence of ozone in the:
- (a)
Mesosphere
- (b)
Thermosphere
- (c)
Stratosphere
- (d)
Troposphere
Which of the following is non-biodegradable?
- (a)
Animal bones
- (b)
Nylon
- (c)
Tea leaves
- (d)
Wool
Name one non-biodegradable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.
- (a)
DDT
- (b)
CFC
- (c)
Radioactive substances
- (d)
PAN
In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?
- (a)
Small fish
- (b)
Microscopic animals
- (c)
Big fish
- (d)
Water birds
Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of hin shells of their eggs.
- (a)
CFC
- (b)
PAN
- (c)
DDT
- (d)
PAC
