Biology - Environmental Issues
Exam Duration: 45 Mins Total Questions : 30
Which of the following does not cause pollution?
- (a)
Automobiles
- (b)
Hydroelectric power plant
- (c)
Thermal powet point
- (d)
Nuclear power plant
World enviroment day is celebrated on
- (a)
5th june
- (b)
28th february
- (c)
7th august
- (d)
10th april
Carbon monoxide combines with haemoglobin to form
- (a)
carboxyhaemoglobin
- (b)
leghaemoglobin
- (c)
haemocyanin
- (d)
methaemglobin
which of the following is the main factor of water pollution?
- (a)
Pesticides
- (b)
Ammonia
- (c)
Industrial wastes
- (d)
Detergents
Limit of BOD prescribed by central Pollution Control Board for the discharges of industrial and municipal waste water into natural surface water, is
- (a)
<3.0 ppm
- (b)
<10 ppm
- (c)
<100 ppm
- (d)
<30 ppm
The presence of water blooms in a lake indicates
- (a)
excessive nutrient
- (b)
nutrient deficiency
- (c)
oxygen deficiency
- (d)
the absence of herbivores
Which one of the following impurities is easiest to remove from wastewater?
- (a)
Bacteria
- (b)
Colloida
- (c)
Dissolved solids
- (d)
Suspended solids
In which of the following layers of atmosphere, ozone depletion is most harmful?
- (a)
Trophosphere
- (b)
stratosphere
- (c)
mesosphere
- (d)
Nanosphere
Which of the following is not one of prime health health risks associated with greater UV radiation through the atmosphere due to the depletion of stratospheric zone?
- (a)
Increased skin cancer
- (b)
Reduced immune system
- (c)
Damage to eyes
- (d)
Increased liver cancer
What gases are produced in anaerobic sludge digesters?
- (a)
Methane and CO2
- (b)
Methane, hydrogen sulphide and CO2
- (c)
Methane, hydrogen sulphide and O 2
- (d)
Hydrogen sulphide and CO2
What is BOD?
- (a)
The amount of O2 used by organisms in water
- (b)
The amount of O2 used by the microorganisms for decomposition
- (c)
The total amount of O2 present in water
- (d)
All of the above
The catalyst in catalytic converter converts
- (a)
The unburnt hydro carbons into carbon dioxide and nitric acid
- (b)
Carbon monoxide and nitric acid into carbon dioxide and nitrogen gas
- (c)
Both (1) and (2)
- (d)
None of the above
Which of the following are the most suitable indicators of SO2 pollution in the environment?
- (a)
Conifers.
- (b)
Algae.
- (c)
Fungi
- (d)
Lichens
Most hazardous metal pollutant of automobile exhausts is
- (a)
Mercury
- (b)
Cadmium.
- (c)
Lead
- (d)
Copper.
The supersonic jets cause pollution by the thinning of
- (a)
CO2 layer.
- (b)
SO2 layer.
- (c)
O2 layer
- (d)
O3 layer
A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this
I. Lots of urea and phosphate fertilisers were used in the crops in the nearby fields.
II. The croplands of the village were fertilised fields rich in nitrate and phosphate.
III. The lake water turned green and stinky.
IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
- (a)
(i) and (iii)
- (b)
(i), (ii) and (iii)
- (c)
(ii), (iii) and (iv)
- (d)
(iii) and (iv)
Fluoride pollution mainly affects
- (a)
teeth
- (b)
kidney
- (c)
brain
- (d)
heart
Read the foilowing statements carefully.
(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.
(ii) Catalytic converters convert unburnt hydrocarbons into CO2 and water.
(iii) Peroxyacyl nitrates (PAN) is a secondary pollutant.
(iv) DDT is a non-biodegradable pollutant.
Which of the above statements are incorrect?
- (a)
(i) and (ii)
- (b)
(iii) and (iv)
- (c)
(i) and (iii)
- (d)
None of these
Noise pollution may cause nervousness and irritability by stimulating the secretion of
- (a)
thyroid hormone
- (b)
adernaline hormone
- (c)
parathyroid hormone
- (d)
none of these.
The amount of biodegradable organic matter in sewage water can be estimated by measuring
- (a)
biochemical oxygen demand
- (b)
the growth of anaerobic bacteria in water
- (c)
biogeological oxygen demand
- (d)
the growth of aerobic bacteria in water.
Given pie-diagram represents the relative contribution of various GHGsto total global warming. Select the correct statement(s) regarding A, B and C.
- (a)
A is the gas which is produced during the combustion of fossil fuels.
- (b)
B are the chemicals which are used as coolants in refrigerators.
- (c)
C is the gas which is the major constituent of biogas.
- (d)
All of these
Increasing skin cancer and high mutation rate are the result of
- (a)
ozone depletion
- (b)
acid rain
- (c)
CO pollution
- (d)
CO2 pollution
Among the following which one causes more indoor chemical pollution?
- (a)
Burning coal
- (b)
Burning cooking gas
- (c)
Burning mosquito coil
- (d)
Room spray
Euro-II (April - 2000) is emission norms for reducing
- (a)
O3 and CO
- (b)
NO2 and N2O
- (c)
Sulphur and Aromatic hydrocarbons
- (d)
CO2 and particulate matter
Acid rain
(a) Causes necrosis
(b) Convert chlorophyll-a into pheophytin
(c) Responsible for formation of PAN
- (a)
Only (a) and (b) are correct
- (b)
Only (b) and (c) are correct
- (c)
Only (a) is correct
- (d)
Only (c) is correct
Photochemical smog
- (a)
Heat emission due to bomb explosion
- (b)
Production of useful ecological effect by a previously useful chemical
- (c)
Formation of secondary pollutant from reaction of primary pollutants
- (d)
Production of adverse ecological effect by a previously useful chemical
Soil fertility is depleted due to
- (a)
Pan breaking
- (b)
Terracing
- (c)
Intensive agriculture
- (d)
Contour Bunding
Which of the following conference obtained commitments from different countries for reducing overall green house gas emission at a level 5% below 1990 level by 2008-2012?
- (a)
Kyoto Protocol, 1997
- (b)
Earth Summit, Rio-de-Janeiro, 1992
- (c)
Montreal Protocol, 1987
- (d)
Helsinki Declaration, 1989
Most effective green house gas is
- (a)
CFC
- (b)
CO2
- (c)
Methane
- (d)
O2
A river with an inflow of domestic sewage rich in organic waste may result in
- (a)
Death of fish due to lack of oxygen
- (b)
Drying of the river very soon due to algal bloom
- (c)
Increased population of aquatic food web organisms
- (d)
An increased production of fish due to biodegradable nutrients