According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameter
1. 2.50 µm
2. 5.00 µm
3. 10.00 µm
4. 7.5 µm
Catalytic converters are fitted into automobiles for reducing emission of poisonous gases. The converters are made up of metals namely
1. Fe, Cu and Rh
2. Pt, Pd and Rh
3. Al, Pd and Th
4. Fe, Cu and Pd
Identify 1., 2., 3. and 4. in the diagram
1. 1.–Dirty air; 2.– Water/lime spray ; 3.– Clean air; 4. – Particulate matter
2. 1.–Clean air; 2.– Water/lime spray ; 3.– Particulate matter; 4. – Dirty air
3. 1.–Water/lime spray; 2.– Particulate matter; 3.– Clean air; 4. – Dirty air
4. 1.–Particulate matter; 2.– Dirty air ; 3.– Clean air; 4. – Water/lime spray
Which is incorrect about electrostatic precipitator (ESP)?
1. Corona produces electrons
2. Collecting plates are grounded, so use to attract the charged dust particle
3. Velocity of air between the plates must be low
4. Electrode wires that are maintained at several thousand volts produces corona
What is/are done by catalytic converters?
(1) Unburnt hydrocarbons are converted to CO2 and H2O
(2) CO is converted to CO2
(3) Nitric oxide is changed to N2 gas
(4) All of these
According to Euro-III norms, sulphur should be controlled at ______ in diesel and _____ in petrol
1. 350 ppm; 50 ppm
2. 50 ppm; 150 ppm
3. 50 ppm; 50 ppm
4. 350 ppm; 150 ppm
Which of the following causes thinning of fish eating bird’s egg shell and their premature breaking?
(1) DDT
(2) Mercury
(3) Faecal matter
(4) Paper fibres
Find the correct match
(1) Black foot disease - Cadmium
(2) Itai-itai - Arsenic
(3) Minimata - Nitrate
(4) Hardened bones - Fluoride
Cultural (Accelerated) eutrophication is
(1) Natural ageing of lake
(2) Aging process of water body due to pollutants from man’s activities like effluents from industries and homes
(3) Natural conversion of water body into land
(4) Less algal growth in water body
Select the correct statements from the following
a. Thermal waste water eliminates or reduces the number of organisms sensitive to high temperature
b. In a young lake, the water is cold and clear supporting the little life
c. DDT disturbs calcium anabolism to birds, which causes thinning of eggshell and their premature
breaking, eventually causing decline in bird’s population
d. Terror of Bengal grows abundantly in eutrophic water bodies
1. a and b 2. c and d
3. a and d 4. All of these
The presence of large amount of nutrients in water causes excessive growth of planktonic (free floating) algae, which gives a distinct colour to water. This is called
(1) Red tide
(2) Biomagnification
(3) Algal bloom
(4) Biofortification
Increase in concentration of the toxic substances at successive trophic levels is known as
(1) Biofortification
(2) Biowar
(3) Bioinformatics
(4) Biomagnification
Which of the following statements about eutrophication are true?
a. It is a naturally occurring process
b. It is commonly found in standing rather than running water
c. It can lead to oxygen depletion
d. It is commonly associated with high levels of nitrates and sulphates
e. It is commonly associated with high levels of phosphates and nitrates
1. All of these 2. a, b, c and d
3. b, c and d 4. a, b, c and e
Measuring biochemical oxygen demand (BOD) is a method used for
(1) Estimating the amount of organic matter in sewage water
(2) Working out the efficiency of oil-driven automobiles engines
(3) Measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale
(4) Working out the efficiency of RBCs about their capacity to carry oxygen
Integrated organic farming is
(1) Cyclical process
(2) Zero waste procedure
(3) Maximum utilisation of resource
(4) All of these
Treatment of e-wastes includes
(1) Buried in landfills
(2) Incineration
(3) Recycling
(4) All of these
Find the incorrect statement
(1) Sanitary landfills were adopted as the substitute for open burning dumps
(2) Seepage of chemical from landfills pollutes the underground water resources
(3) All waste that we generate can be categorised into three types, that is, bio-degradable, recyclable and non-biodegradable
(4) Open dumps inhibitsbreeding of rats and flies
How deep should nuclear waste after sufficient pre-treatment be buried (in shielded containers) within the rocks below the earth’s surface?
(1) 100 m
(2) 200 m
(3) 300 m
(4) 500 m
Eco-san toilets are not associated with which of the following?
(1) Working is Sri Lanka and Kerala
(2) Composting method for recycling of human excreta
(3) Recycled material forms natural fertiliser
(4) Enhance the need for chemical fertilisers
What did Chernobyl,Three mile Island and Bhopal all have in common?
(1) They all qualified as technological disasters
(2) They all are involved in environmental racism
(3) Environmental problems were caused by economic development in all these places
(4) Nuclear disasters took place in all these places
Prolonged water logging in agricultural fields is likely to create the problem of
(1) Poor aeration and low salinity
(2) Poor aeration and high salinity
(3) Poor aeration and high acidity
(4) Metal toxicity and proper aeration
Which of the following figures shows correct relative contribution of greenhouse gases to global warming?
(1)
(2)
(3)
(4)
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, a disease known as
(1) Night-blindness
(2) Xerophthalmia
(3) Epicanthus
(4) Snow-blindness
The presence of ozone (O3) in the stratosphere of atmosphere
(1) Hinders higher rate of photosynthesis
(2) Helps in checking the penetration of ultra-violet rays to earth
(3) Has been responsible for increasing the average global temperature in recent years
(4) Is advantageous since it supplies O2 for people travelling in jets
Government of India has recently instituted which award for individuals or communities from rural areas that have shown extra ordinary courage and dedication in protecting wildlife?
(1) Padma Bhushan
(2) Chipko Award
(3) Bharat Ratna
(4) Amrita Devi Bishnoi-Wildlife Protection Award
The Earth Summit, 1992, was held at
(1) Rio de Janeiro
(2) Kyoto
(3) St. Petersburg
(4) Washington
Match column-I with column-II and select the correct option
Column-I Column-II
a. Air (prevention and control of (i) 1987
pollution) Act
b. Water (prevention and control of (ii) 1981
pollution) Act
c. Noise added as air pollutant (iii) 1974
d. Environment (Protection) Act (iv) 1986
1. a – (ii) ;b – (iii) ; c – (i) ; d – (iv)
2. a – (i) ;b – (iii) ; c – (ii) ; d – (iv)
3. a – (iv) ;b – (iii) ; c – (ii) ; d – (i)
4. a – (iv) ;b – (iii) ; c – (i) ; d – (ii)
Read the following statements and chooser the correct option
Statement A: Electrostatic precipitator can remove over 99% particulate matter present in exhaust from a thermal power plant.
Statement B: According to CPCB particulate size 2.5m or less in diameter are responsible for causing the greatest harm to human health.
1. Only statement A is correct.
2. Only statement B is correct.
3. Both statements A and B are correct.
4. Both statements A and B are incorrect.
State True (T) or False (F) for the following statements and select the correct option
A. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
B. Recently government of India has instituted the Amrita Devi Bishnoi Wildlife Protection Award for
individuals from urban areas that have shown extraordinary courage and dedication in protecting
wildlife.
C. Reforestation may occur naturally in a deforested area.
A B C
1. T T F
2. T F T
3. T F F
4. F F T
Select the correct option regarding relative contribution of various greenhouse gases to total global warming.
1.
2.
3.
4.