Biology - Environmental issues
Exam Duration: 45 Mins Total Questions : 30
Recent reports of acid rains in big industrial cities are due to the effect of atmospheric pollution by
- (a)
more release of NO2 and SO2 by burning of fossil fuels
- (b)
more release of CO2 by burning of coal/wood cutting of forests and increasing populations
- (c)
excessive release of NH3 by coal gas/industries
- (d)
excessive release of CO by incomplete combustion of carbonaceous fuels
Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air bones particles which lead to
- (a)
photochemical smog
- (b)
dry acid deposition
- (c)
wet acid deposition
- (d)
Both (b) and (c)
which of the following is the main factor of water pollution?
- (a)
Pesticides
- (b)
Ammonia
- (c)
Industrial wastes
- (d)
Detergents
\(SO_{2}\) pollution causes
- (a)
membrane damage
- (b)
plasmolysis
- (c)
Chlorophyll destruction
- (d)
All of the above
Biomagnification is
- (a)
increase in concentration of the toxicant at successive trophic levels
- (b)
the natural ageing of a lake by biological enrichment of its water
- (c)
heated (thermal) Waste water flowing out of electricity generating units
- (d)
waste from homes, offices, stores, schools, hospitals, etc
If we continuously add sewage water in a river the BOD of river will
- (a)
decrease continuously
- (b)
increase continuously
- (c)
be higher before addition of sewage water
- (d)
be lower after addition of sewage water
Which of the following is not used for disinfection of drinking water?
- (a)
Phenyl
- (b)
Chloramine
- (c)
Chlorine
- (d)
Ozone
Which one of the following pairs is mismatched?
- (a)
Biomass burning - Release of CO2
- (b)
Fossil fuel burning - Release of CO2
- (c)
Nuclear power - Radioactive wastes
- (d)
Solar energy - Greenhouses effect
Which of the following treaty was signed to recongnising the deleterious affects of ozone depletion?
- (a)
Chipko movement
- (b)
Montreal protocol
- (c)
Earth Summit
- (d)
Kyoto protocol
'Chipko Movement' is connected with
- (a)
project tiger
- (b)
plant breeding
- (c)
plant/forest conservation
- (d)
conservation of natural resources
Match the following columns
Column I | Column II | ||
A | Kyoto protocol | 1 | September 1987 |
B | Motreal protocol | 2 | 1986 |
C | Environment protection Act | 3 | Incomplete biomass combusion |
D | Methane | 4 | December 1997 |
5 | Global warming |
- (a)
A B C D 4 1 2 3 - (b)
A B C D 1 2 3 4 - (c)
A B C D 2 3 1 5 - (d)
A B C D 5 4 2 1
Which one of the following pairs of gases are the majot cause of 'Greenhouse effect'?
- (a)
CO2 and CO
- (b)
CFCs and SO2
- (c)
CO2 and N2O
- (d)
CO2 and O3
In coming years, skin related disorders will be more common due to
- (a)
Air pollution
- (b)
Use of detergents
- (c)
Water pollution
- (d)
Depletion of ozone layer
Ozone hole means
- (a)
Hole in the ozone layer in stratosphere
- (b)
Decrease in thickness of ozone layer in stratosphere
- (c)
Decrease in concentration of ozone in troposphere
- (d)
Increase in the concentration in troposphere
For the functioning of electro static precipitators to remove dust particles
1. Electrode wires are maintained at several thousand volts
2. A corona must be produced that releases electrons to attach dust
3. The velocity of air between the plates must be low enough to allow the particles to fall on them
- (a)
i & ii correct
- (b)
i & iii correct
- (c)
ii & iii correct
- (d)
i, ii & iii correct
Catalytic converter does not use the metal
- (a)
Lead.
- (b)
Rhodium.
- (c)
Palladium.
- (d)
Platinum.
Permanent loss of hearing and damage to the eardrum can be caused by extremely high sound level of more than
- (a)
20 dB.
- (b)
60 dB .
- (c)
120 dB.
- (d)
150 dB.
In which one of the following the processes CO2 is not released?
- (a)
Alcoholic fermentation.
- (b)
Lactate fermentation
- (c)
Aerobic respiration of plants
- (d)
Aerobic respiration in animals
High value of BOD (Biochemical Oxygen Demand) indicates that
- (a)
water is pure
- (b)
water is highly polluted
- (c)
water is less polluted
- (d)
consumption of organic matter in the water is higher by the microbes
Carbon monoxide is a pollutant because it
- (a)
Reacts with O2
- (b)
Inhibits glycolysis
- (c)
Reacts with haemoglobin
- (d)
Makes the nervous system inactive
If there was no CO2 in the earth's atmosphere the temperatures of earth's surface would be
- (a)
Same as present.
- (b)
Less than the present.
- (c)
Higher than the present.
- (d)
Dependent on the amount of oxygen in the atmosphere.
Which one of the following organism is used as indicator of water quality?
- (a)
Beggiatoa
- (b)
Chlorella
- (c)
Azospirillum
- (d)
Escherichia
The Taj Mahal is threatened due to the effect of
- (a)
oxygen
- (b)
hydrogen
- (c)
chlorine
- (d)
sulphur dioxide
Peroxyacyl nitrates (PAN) are formed through photo - photochemical reactions between
- (a)
sulphur oxides and hydrocarbons
- (b)
nitrogen oxides and hydrocarbons
- (c)
nitrogen oxides and O3
- (d)
CFCI3 and 03'
Given below is a diagram of electrostatic precipitator. Identify A, B, C and D and select the option.
- (a)
A B C D Negatively charged wire Negatively charged dust particles Discharge corona Collection plate - (b)
A B C D Negatively charged wire Discharge corona Collection plate Negatively charged dust particles - (c)
A B C D Positively charged Wire Positively charged dust particles Discharge corona Collection plate - (d)
A B C D Positively charged wire Discharge corona Collection plate Positively Positively dust particles
The term 'terror of Bengal' is used for
- (a)
algal bloom
- (b)
Eichhornia crassipes
- (c)
increased biochemical oxygen demand
- (d)
eutrophication.
The graph given below represents changes in different ecological parameters due to effluent mixing in a stream. The three lines A, Band C represent
- (a)
A: oxygen concentration
B: biological O2 demand
C: pollution resistant species - (b)
A: pollutant
B: aerobic process
C: anaerobic process - (c)
A : oxygen concentration
B: CO2 concentration
C: temperature - (d)
A: phosphate concentration
B: nitrate concentration
C: rate of photosynthesis.
Why is it necessary to remove sulphur from petroleum products?
- (a)
To reduce the emission of sulphur dioxide in exhaust fumes
- (b)
To increase efficiency of automobiles engines
- (c)
To use sulphur removed from petroleum for commercial purposes
- (d)
To increase the life span of engine silencers
Assertion: Deforestation increases carbon dioxide concentration in the atmosphere.
Reason: Deforestation may lead to desertification.
- (a)
If both assertion and reason are true and reason is the correct explanation of assertion
- (b)
If both assertion and reason are true but reason is not the correct explanation of assertion
- (c)
If assertion is true but reason is false.
- (d)
If both assertion and reason are false
Ozone hole was first discovered by
- (a)
Robert Augus
- (b)
Molina
- (c)
Farman
- (d)
Rowland