1. Wind rose of a given location represents:
A. Frequency distribution of wind speeds in the form of a histogram.
B. Frequency distribution of wind speeds in percentage terms in the form of a pie chart.
C. Frequency distribution of wind speed associated with a cyclose.
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D. Frequency distribution of wind speed and direction in polar coordinates.
2. Assertion (A): Sustainable production of hay or green fodder is essential for uninterrupted supply of animal products.
Reason (R): Environmental concerns are detrimental for sustainable production of hay or green fodder.
A. Both (A) and (R) are true but (R) is not the correct explanation of (A)
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B. Both (A) and (R) are true and (R) is the correct explanation of (A)
C. (A) is true and (R) is false
D. (A) is false and (R) is true
3. For a clear sunny day with sun higher than 60° above horizon and wind speed greater than 6 m/sec, the atmosphere is:
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A. Stable
B. Slightly unstable
C. Moderately unstable
D. Very unstable
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4. The mass of the earth’s crust is approximately:
A. 2.5 x 1025 gm
B. 3.2 x 1020 gm
C. 2.8 x I032gm
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D. 1.8 x 1035gm
5. The time scale of meso-scale meteorological phenomenon is:
A. Hours to a day
B. 3-4 days
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C. Few weeks
D. Few weeks to several months
7. How CO emitted by automobiles prevents transfer of O, in the body tissue:
A. By changing O, into CO
B. By destroying the haemoglobin
C. By forming stable compound with haemoglobin
D. By obstructing the reaction of 02 with haemoglobin
8. In qualitative analysis the sulphides of Group- II are precipitated in presence of dilute HC1, while of Group-IV are precipitated only in the presence of NH4OH. It is because:
A. Solubility product of sulphides of Group-II is greater than that of Group-IV
B. Solubility product of sulphides of Group-II is less than that of Group-IV
C. Sulphides of Group-II are insoluble in acids
D. Sulphides of Group-IV are insoluble in alkalies
9. Arrange the following atmospheric gases in *’ – decreasing order of their abundance.
I. Oxygen II. Carbon di-oxide
III. Argon IV. Methane
Code:
A. Ill > I > II > IV
B. II > I > III > IV
C. I > III > II > IV
D. Ill > I > IV > II
10. Which of the following is equivalent to the number of substrate molecules converted to product in a given unit of time by a single enzyme molecule when the enzyme is saturated with substrate?
A. Specific constant
B. Michaelis constant
C. Dissociation constant
D. Turn-over number
11. DDT harmful from the ecological point of view mainly because it undergoes:
A. Biotransformation
B. Bioaccumulation
C. Biomagnification
D. Biodegradation
12. Which of the following radiations continuously act on 14N to produce 14C isotope in the atmosphere?
A. X-rays
B. Beta -rays
C. UV-rays
D. Cosmic rays
13. The proteins in the cell walls of microorganisms have an overall net negative charge at pH of most soil environments, because:
A. the pH of the environment is greater than the pI
B. the pH of the environment is less than the PI
C. the pH of the environment is the same as pI
D. none of the above
14. Oxidoreductases:
A. oxidize a substrate by removing a pair of electrons and the accompanying hydrogen atoms
B. breaks molecules apart by adding water across I bonds
C. hydrolyse the substrate
D. put molecules together
15. Which of the following is a nematofungus?
A. Rhizoctonia solani
B. Penicillium sp.
C. Phanerochaete chrysosporiitm
D. Mucor niuceclo
16. The diaatomaceous earth is used as a:
A. chemical insecticide
B. non-chemical insecticide
C. fungicide
D. bactericide
17. Assertion (A) : Among micro-organisms white- rot fungi most efficiently degrade lignin.
Reason (R): White-rot fungi produce ligninolytic enzymes.
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true
18. In deep oceans the phenomenon of inverted biomass pyramid occurs mainly due to:
I. Fast growth rate and high nutrient requirement of producers.
II. Rapid turnover rate and short life span of producers.
III. Slow growth rate and high nutrient requirement of herbivores.
IV. Slow turnover and long life span of herbivores.
Which of the following combinations is correct?
A. I and III
B. I and IV
C. II and III
D. II and IV
19. Alpha diversity represents:
A. species richness
B. species evenness
C. species richness and evenness
D. species richness and dominance
20. Populations of two species may interact in several ways. One of these called protoco- operation occurs when:
A. One population inhibits the other
B. Interaction is favourable to both but not obligatory
C. Interaction is favourable to both but obligatory
D. Neither population affects the other
21. The term benthos refers to communities which grow:
A. Attached on the bark of trees
B. Attached on submerged plants
C. Attached at the bottom of a water body
D. Attached on submerged woody roots
22. Pelagic sediments are found in the:
A. continental shelf
B. continental slope
C. mid-oceanic ridges
D. deep oceanic plains
23. Pleistocene period began:
A. 5.0 million years ago
B. 1.7 million years ago
C. 10 million years ago
D. 28 million years ago
24. Sodium and Potassium in rock and soil materials are generally estimated by:
A. UV – Visible spectrophotometry
B. Flame photometry
C. HPLC
D. Colorimetry
27. Chemical weathering of rock material is most effective in which of the following regions?
A. Aravali Hills
B. Vindhyan Hills
C. Ladakh
D. Western Ghats
28. Fission of 1 gm of 235U liberates energy equivalent to about:
A 1 metric ton of coal
B. 1.5 metric ton of coal
C. 2.2 metric ton of coal
D. 2.7 metric ton of coal
29. Under operating conditions of maximum power output from an ideal Magneto hydrodynamic power plant, the electrical efficiency is:
A. 50 %
B. 25 %
C. 75 %
D. 100 %
31. Assertion (A): Electrostatic precipitators are very efficient devices for removal of particulate matter from the gas stream.
Reason (R): Corona discharge helps in charging of particulate matter which is collected on the grounded electrodes (plates).
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true
32. Stratospheric ozone is produced by electromagnetic radiations of wavelength in the range:
A. 180 – 240 nm
B. 280 – 320 nm
C. 320 – 400 nm
D. 150 – 180 nm
35. If the EIA indicates that another state is likely to be affected, the state, in which EIA is planned, has to:
A. transmit to the affected state any relevant information from the EIA concerning it
B. keeps the relevant information fully secret
C. handover the information to the central pollution control board
D. none of the above
36. The combination of primary and secondary treatment reduces the original sewage BOD by:
A. 30 – 40 %
B. 50 – 60 %
C. 160 – 70 %
D. 80 – 90 %
37. A simple and relatively inexpensive film-flow •type of aerobic treatment method is:
A. Septic tank
B. Activated sludge process
C. Percolating filter system
D. All the above
38. Which of the following is not a molecular method for the detection of microbial population from water/soil?
A. Dot-blot hybridization
B. MPN
C. RT-PCR
D. PCR
39. Under Kyoto Protocol, the percentage reduction sought to be achieved in CO, emissions from 1990 levels by the year 2012 is:
A ~ 10 %
B. ~ 5.2 %
C. ~ 15.2 %
D. ~20.5 %
44. For a Normal distribution, the moment coefficient of skewness is:
A. 0
B. 1
C. 3
D. -1
45. Which of the following water purification technology removes minerals from drinking water?
A Filtration
B. Ultra-filtration
C. Reverse osmosis
D. UV treatment
47. Convention on Biological Diversity, adopted at the UN Conference on Environment and Development in 1992, aims to curb destruction of:
A. Biological species
B. Habitats
C. Ecosystems
D. All of the above
48. According to IPCC, during the 20th century earth’s mean surface temperature has risen by:
A. ~ 0.4 °C
B. – 0.6 °C
C. ~ 0.8 °C
D. ~ 1.0 °C
49. According to US water standards, the maximum permissible coliforms count (number/100 ml) in recreational waters is:
A. 10,000
B. 5,000
C. 1,000
D. 500
50. Assertion (A): At present in India, the use of solar energy is rather limited.
Reason (R): Large scale use of solar energy has uncertain environmental implications.
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true
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