UGC NET 2015: December, Paper II, Environmental Sciences
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D8 9 1 5 PAPER - II
Time : 1¼ hours] ENVIRONMENTAL SCIENCE [Maximum Marks : 100
Number of Pages in this Booklet : 8 Number of Questions in this Booklet : 50
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D-8915 !D-8915-PAPER-II! 1 P.T.O.
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ENVIRONMENTAL SCIENCE
PAPER - II
Note : This paper contains fifty (50) objective type questions of two (2) marks each. All questions
are compulsory.
1. Which one of the following elements contributes maximum to the earth crust by weight ?
(1) Iron (2) Silicon (3) Oxygen (4) Carbon
2. The lowest temperature is observed in which layer of the atmosphere ?
(1) Troposphere (2) Stratosphere (3) Mesosphere (4) Thermosphere
3. Which of the following gases has the lowest residence time ?
(1) CO 2 (2) N2O (3) CFCs (4) CH4
4. Which of the following statement is incorrect ?
(1) Chromium (VI) is highly toxic
(2) Methyl mercury is most toxic mercury species
(3) Arsenic (III) is more toxic than arsenic (V)
(4) Cadmium is a criteria pollutant
5. The most abundant functional group present in fulvic acid, commonly found in soils, is :
(1) Peptide group (2) Carboxylate group
(3) Phenolic group (4) Amino group
6. The source of Stratospheric NOx is :
(1) Atmospheric N2 (2) Tropospheric N2O
(3) Tropospheric NO (4) Tropospheric NO2
7. In troposphere, which of the following processes does not generate hydroxyl radical ?
(1) O(1D)1H2O (2) O(3P)1H2O (3) HCHO1hn (4) HNO21hn
8. The most common form of lead present in pesticide is :
(1) Lead acetate (2) Lead arsenate (3) Lead azide (4) Lead telluride
9. Consider the following four statements about benzo[a]pyrene :
(a) It is a group 1 carcinogen
(b) It is a polycyclic aromatic hydrocarbon
(c) Its molecular formula is C20H12
(d) It has four benzene rings
Choose the correct code :
(1) (a) and (b) only (2) (a), (b) and (c) only
(3) (b), (c) and (d) only (4) (a), (b), (c) and (d)
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10. Given below are two statements. One labelled as Assertion (A) and the other labelled as
Reason (R) :
Assertion (A) : Radon is an inert gas and it is radioactive.
Reason (R) : All inert gases are radioactive.
Choose the correct answer :
(1) Both (A) and (R) are correct and (R) is the correct explanation of (A).
(2) Both (A) and (R) are correct and (R) is not the correct explanation of (A).
(3) (A) is true, but (R) is false.
(4) (A) is false, but (R) is true.
11. Most of Epiphytes are examples of type of biotic interactions called :
(1) Mutualism (2) Coevolution (3) Commensalism (4) Parasitism
12. Inhalation of airborne mold spore leads to disease in man such as :
(1) Bronchitis (2) Allergy
(3) Cardiac congestion (4) Eye irritation
13. Biological diversity is mainly a function of :
(a) Latitude
(b) Longitude
(c) Distance from sea
Choose the correct answer :
(1) (a) only (2) (a) and (b) only (3) (b) and (c) only (4) (a), (b) and (c)
14. The ability of a living system to be restored through secondary succession after a more severe
disturbance is known as :
(1) Rehabilitation (2) Resistance (3) Resilience (4) Restoration
15. The characteristic feature of the background extinction is disappearance of a species at a :
(1) low rate (2) fast rate (3) lapse rate (4) intrinsic rate
16. Speciation means :
(1) Natural process of extinction of different species
(2) Artificial process of extinction of different species
(3) One species splits into two or more different species naturally
(4) Characterisation of different species
17. Topological modelling is a well organized cluster of functions in GIS to process :
(a) Spatial data
(b) Attribute data
(c) Physico - chemical data
(d) Species richness data
Choose the correct code :
(1) (a) and (b) only (2) (b) and (c) only
(3) (a), (b) and (c) only (4) (a), (b), (c) and (d)
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18. A rock body or formation which may be porous enough to hold enough quantity of water
but which by virtue of its other properties does not allow an easy and quick flow through it,
is called :
(1) Aquitard (2) Aquifuge (3) Aquiclude (4) Aquifer
19. For many decades, geologists noted the high number of earthquakes and active volcanoes
occurring around the rim of the Pacific Ocean basin. This is called :
(1) Volcanic ring (2) Ring of fire
(3) Earthquake zone (4) Volcanic hot spot
20. Inversion that occurs near Earths Surface is called :
(1) Radiation inversion (2) Advectional inversion
(3) Subsidence inversion (4) Cold - air - drainage inversion
21. The radiation flux emitted per unit solid angle in a specified direction by a unit area of source
is called :
(1) irradiance (2) radiance (3) exitance (4) radiant flux
22. Mean residence time of soil organic matter in an ecosystem is maximum in :
(1) Tropical rain forest (2) Boreal forest
(3) Temperate coniferous forest (4) Dry deciduous forest
23. Worst affected area by Indian Ocean Tsunami of December 2004 in India was :
(1) Andaman and Nicobar Islands (2) Tamil Nadu
(3) Andhra Pradesh (4) Odisha
24. Consider solar insolation of 400 W/m2 incident on a single solar cell of area 100 cm2. If only
15% of the photons cause electron - hole pairs and the average energy of incident photons is
~1 eV, the short circuit current of the cell is :
(1) 1.2 A (2) 1.5 A (3) 1.6 A (4) 1.8 A
25. For which of the following renewable resources of energy, sun is not directly responsible ?
(1) Wind (2) Biomass (3) OTEC (4) Tidal
26. In terms of the calorific value, identify the correct sequence :
(1) Methane > hydrogen > ethanol > methanol
(2) Hydrogen > methane > ethanol > methanol
(3) Methane > hydrogen > methanol > ethanol
(4) Hydrogen > ethanol > methane > methanol
27. At a given location the wind speeds are predominantly in the range 6 to 6.4 m/s. This
locations wind power class will be termed as :
(1) Fair (2) Good (3) Excellent (4) Outstanding
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28. Which of the following nuclides does not undergo fission with low energy (slow) neutrons ?
(1) 235 U (2) 238 U (3) 239 Pu (4) 233 U
29. According to CPCB standards, the annual average concentration of PM 2.5 should not
exceed :
(1) 60 mg m23 (2) 40 mg m23 (3) 80 mg m23 (4) 100 mg m23
30. Which of the following is a secondary aerosol ?
(1) Pollens (2) Virus
(3) Sodium Chloride (4) Ammonium Sulphate
31. In the colorimetric determination of ambient SO2 by WEST-GAEKE method, the absorbance
of the colored complex should be measured at which of the following wavelengths ?
(1) 550 nm (2) 650 nm (3) 450 nm (4) 350 nm
32. A healthy human ear, before experiencing pain, can detect sound pressure levels as high
as :
(1) 50 Pa (2) 100 Pa (3) 200 Pa (4) 1000 Pa
33. The resultant of two noise levels of 80 dB and 50 dB will be about :
(1) ~ 80 dB (2) ~ 82 dB (3) ~ 60 dB (4) ~ 130 dB
34. The half life of radioactive iodine 2131 is :
(1) 30 years (2) 15 years (3) 5 years (4) 8 years
35. Which of the following best describes the function of the environmental management plan
as a part of the environmental statement ?
(1) It describes the environmental impacts of the proposal.
(2) It describes the baseline environmental data.
(3) It describes the project proposal in detail.
(4) It describes the actions and auditing procedures needed.
36. India submitted its INDCs related to climate change to the UN recently. What does INDCs
stand for ?
(1) Intended Nationally Devoted Contributions
(2) Intended Nationally Determined Contributions
(3) Intended Notified Decisive Contributions
(4) Indias Nationally Determined Contributions
37. Formal EIA became an integral part of Environmental Management in India by a Notification
for the first time in :
(1) 1988 (2) 1990 (3) 1992 (4) 1994
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38. EIA is necessary because :
(a) Development is not good for environment
(b) Environmental impacts of development are in public interest
(c) There is growing interest in sustainability
Choose the correct answer :
(1) (a) only (2) (b) only (3) (b) and (c) only (4) (a), (b) and (c)
39. A moist air parcel at 248C has a mixing ratio of 10 g per kg. Its virtual temperature is :
(1) ~ 25.818C (2) ~ 20.688C (3) ~ 31.258C (4) ~ 28.128C
40. The Vienna Convention is basically related to :
(1) International trade in endangered species
(2) Protection of O3 layer
(3) Biodiversity conservation
(4) Preservation of cultural environment
41. According to Wildlife Protection Act in India, who is the authority to issue permission to
hunt rogue animals ?
(1) Chief Minister of the State (2) Chief Wildlife warden
(3) Conservator of Forest (4) Deputy Commissioner
42. According to MOEF (now MOEFCC) notification of 1992, for labelling cosmetics as
environment friendly product, the presence of fluoride (F) in tooth paste/powder should not
exceed :
(1) 20 ppm (2) 50 ppm (3) 100 ppm (4) 10 ppm
43. Which one of the following methods converts decomposed liquid or solid hazardous organic
waste effectively ?
(1) Open incineration (2) Plasma incineration
(3) Sanitory landfill (4) Bioremidiation
44. For a bi-variate sample, the correlation coefficient is 0.25 and it is found to be significantly
different from zero at 5% level of significance. Given t0.0551.645, what is the minimum size
of the sample ?
(1) 43 (2) 50 (3) 55 (4) 63
45. Which one of the following is non-probability sampling ?
(1) Convenience probability (2) Stratified
(3) Cluster (4) Systemic
46. A parametric test generally used to compare sample variance to a theoretical population
variance, is :
(1) F - test (2) Z - test (3) t - test (4) x2 - text
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47. From a random sample of 36 fish caught in a sample, the mean length X ( ) and sample
standard deviation (sd) were found to be 30 cm and 6 cm respectively. If at 95% confidence
level z is 1.96, then the mean length of fish in this population is in the range :
(1) 27 < X < 33 (2) 27.5 < X < 32.5 (3) 24 < X < 36 (4) 28.04 < X < 32
48. One of the natural causes of occurrence of inland soil alkalinity is the presence of :
(1) Sodium hypochlorite (2) Potassium nitrate
(3) Sodium chloride (4) Sodium carbonate
49. The Supreme Court of India directed the government to implement environmental education
in all educational institutions as compulsory subject in :
(1) 1976 (2) 2003 (3) 1988 (4) 2014
50. Organic wetland soils have :
(1) high cation capacity (2) high bulk density
(3) low porosity (4) high nutrient availability
-o0o-
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