ENVIRONMENTAL SCIENCE
Paper – II
Note : This paper contains fifty (50) objective type questions of two (2) marks each. All questions are compulsory.
1. For a clear night and with windspeeds < 3 m/s, the atmosphere is
(A) stable
(B) slightly unstable
(C) neutral
(D) slightly stable
2. Assertion (A) : Chemosynthesis plays an important role in ‘S’ cycle.
Reason (R) : In chemosynthesis, some sulphur compounds act as source of energy.
Codes :
(A) Both (A) and (R) are true and (R) is the correct explanation.
(B) Both (A) and (R) are true and (R) is not the correct explanation.
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.
3. Which of the following is NOT a correct statement ?
(A) Tropics are the warmest and wettest regions.
(B) Subtropical high pressure zones create dry zones at about 30° N and S.
(C) Temperature and precipitation are lowest at the poles.
(D) Temperature is lowest and precipitation is highest at the poles.
4. Protecting nature and the wilderness for its own sake is referred as
(A) Deep ecology
(B) Shallow ecology
(C) Self ecology
(D) Selfless ecology
5. For the analysis of oxides of Nitrogen, which of the following set of reagents are used ?
(A) Sulphanilic acid, NEDA, H2O2, HNO3
(B) Sulphamic acid, NEDA, H2O2, HNO3
(C) Sulphamic acid, Nicotine, H2O, HNO3
(D) Sulphomolybdic acid, NEDA, H2O2, H2SO4
6. Number of ions of cadmium present in 3n moles of cadmium nitrate is
(A) 18.069 × 1023
(B) 18.069 × 1020
(C) 18.069 × 1017
(D) 18.069 × 1014
7. Which one of the following organisms is a free living nitrogen fixer ?
(A) Rhizobium
(B) Azotobacter
(C) Frankia
(D) Dorylimes
8. Which one of the following has highest bioconcentration factor (BCF) ?
(A) DDT
(B) DDE
(C) Chlordane
(D) Heptachlor
9. Consider an Ocean Thermal Energy Conversion (OTEC) process operating between 30 °C and 5 °C. What would be the maximum possible efficiency for an electricity generator station operating with these temperatures ?
(A) 8%
(B) 15%
(C) 25%
(D) 40%
10. The process of ‘Nebulisation’ in Atomic Absorption Spectrophotometry is to
(A) convert the liquid sample to gaseous form.
(B) convert the liquid sample into small droplets.
(C) sublimate the sample.
(D) solubilization of the solute.
11. Individuals of a plant species occurring in a particular area constitute
(A) fauna
(B) flora
(C) flora and fauna
(D) population
12. A local population genetically, structurally and functionally adapted to its local environment is called
(A) ecotype
(B) ecophene
(C) ecad
(D) ecocline
13. Mycorrhizae is an example of
(A) Ammensalism
(B) Commensalism
(C) Parasitism
(D) Symbiosis
14. The entire series of communities of biotic succession from pioneer to climax community is known as
(A) Troph
(B) Sere
(C) Population
(D) Biome
15. In which of the following ecosystems the pyramid of biomass is inverted ?
(A) Forest
(B) Grassland
(C) Pond
(D) Desert
16. The first National Park established in India is
(A) Kaziranga National Park
(B) The Jim Corbett National Park
(C) Hazaribagh National Park
(D) Gir National Park
17. The animals that rest or swim on the surface of the lakes are called
(A) Nektons
(B) Neustons
(C) Benthos
(D) Peritons
18. Which of the following is an example of in situ conservation of biodiversity ?
(A) Captive breeding
(B) Seed bank
(C) National park
(D) Pollen bank
19. A biome contains
(A) many ecosystems
(B) many communities
(C) many populations
(D) a single ecosystem
20. In Bhopal gas tragedy, the quantity of Methyl Isocyanate leaked into the atmosphere was around
(A) ~ 180 tonnes
(B) ~ 60 tonnes
(C) ~ 112 tonnes
(D) ~ 40 tonnes
21. What is the sequence of arrival of seismic waves at a recording station ?
(A) P-wave, S-wave, L-wave, R-wave.
(B) S-wave, P-wave, R-wave, L-wave.
(C) R-wave, L-wave, P-wave, S-wave.
(D) S-wave, L-wave, R-wave, P-wave.
22. The presence of ammonia in groundwater may indicate a nearby
(A) coal mine
(B) municipal solid waste dumping site
(C) thermal power plant
(D) granite quarry
23. Given below are statements in the context of a truly vertical aerial photograph :
(i) The principal point, nadir point and isocentre coincide.
(ii) Isocentre is the centre from where the radial displacements of images take place.
(iii) Tilt is a character of vertical aerial photograph.
Identify the correct answer from the codes given below :
(A) (i) only
(B) (i) & (ii) only
(C) (i) & (iii) only
(D) (ii) & (iii) only
24. Kaolinite is a type of clay Mineral with layers of silicon and aluminium in the ratio of
(A) 1 : 1
(B) 1 : 2
(C) 2 : 1
(D) 3 : 1
25. In an ideal Magneto Hydro Dynamic Power Generator, the separation between the plates = 0.5 m, magnetic
flux density = 2 Wb/m2 and average fuel velocity = 500 m/sec. The voltage developed across the plates will be
(A) 500 V
(B) 1000 V
(C) 2000 V
(D) 5000 V
26. If the wind speed in a certain area increases by a factor of 2 from 4 m/s to 8 m/s, the power output from an deal wind mill will increase by a factor of
(A) 4
(B) 8
(C) 16
(D) 2
27. Under Jawaharlal Nehru Solar Mission of Government of India, a total of 20,000 MW of utility Grid Power (including roof to solar power) is sought to be installed by the year
(A) 2020
(B) 2022
(C) 2025
(D) 2030
28. In which country dry steam deposits have been used as such for electricity generation ?
(A) Italy
(B) Iceland
(C) Austria
(D) New Zealand
29. The resources which are unlimited and where quality is not degraded are termed as
(A) renewable
(B) reusable
(C) immutable
(D) exhaustible
30. The most toxic form of mercury in water is
(A) 2 Hg+
(B) Hg2+
(C) H3C – Hg+
(D) Hgo
31. Hardness of water is due to the presence of
(A) Calcium and Magnesium ions
(B) Strontium and Nitrate ions
(C) Sodium and Chloride ions
(D) Potassium and Nitrite ions
32. Principal constituents of atmospheric brown clouds are
I. Soot
II. Soil dust
III. Fly ash
IV. Sulphates and nitrates
Identify the correct code :
(A) I & II only
(B) I & IV only
(C) II, III and IV only
(D) I, II, III and IV
33. The famous ‘London Smog’ was observed in the year
(A) 1750
(B) 1952
(C) 1972
(D) 2000
34. The permissible limit of day time industrial noise as recommended by WHO is
(A) 80 dB
(B) 75 dB
(C) 90 dB
(D) 76 dB
35. Surface litter layer on ground soil is also known as
(A) ‘O’ horizon
(B) ‘A’ horizon
(C) ‘B’ horizon
(D) ‘C’ horizon
36. Which one of the following represents the correct Uranium decay series ?
(A) Uranium →Radium → Radon → Polonium
(B) Uranium → Radon → Radium → Polonium
(C) Uranium → Radium → Polonium → Radon
(D) Uranium → Radon → Polonium → Radium
37. Hydropower projects with large reservoirs affect the environment by release of
(A) CO
(B) CO2
(C) CH4
(D) NO2
38. Terms of reference is fixed at which stage of EIA process ?
(A) Screening stage
(B) Scoping stage
(C) Detailed EIA stage
(D) Project Appraisal stage
39. Arrange the functions associated with EIA in a sequential manner
(i) Identification
(ii) Prediction
(iii) Defining the scope
(iv) Impact evaluation and analysis
Codes :
(A) (i) (iii) (iv) (ii)
(B) (ii) (iv) (i) (iii)
(C) (iii) (i) (ii) (iv)
(D) (iv) (ii) (iii) (i)
40. The role of State Pollution Control Board in EIA is
(i) Public hearing / consultation
(ii) Issue of NOC
(iii) Collecting environmental data
(iv) Survey of fauna and flora
Codes :
(A) (i) and (iii) only
(B) (i) and (ii) only
(C) (iii) and (iv) only
(D) (ii) and (iii) only
41. Percentage of carbon in a typical municipal solid waste ranges from
(A) 50 – 60 %
(B) 40 – 50 %
(C) 30 – 40 %
(D) 20 – 30 %
42. Which one of the following has maximum destruction and removable efficiency ?
(A) Incineration
(B) Biological Treatment
(C) Chemical Treatment
(D) Landfill
43. Wastes are known to be corrosive if the pH is
(A) ≤ 2
(B) ≤ 3
(C) ≤ 4
(D) ≤ 5
44. Hazardous Waste Management and Handling Rule was enacted in the year
(A) 1989
(B) 1979
(C) 1969
(D) 1999
45. For a given set of data 5, 8, 12, 15 and 20, the comparison of geometric 
and arithmetic mean 
will be
46. Algal bloom follows a population growth pattern, which is
(A) J – shaped
(B) S – shaped
(C) Exponential
(D) Linear
47. t-distribution is approximately normal for sample size η
(A) ≥ 30
(B) ≥ 10
(C) ≥15
(D) ≥ 20
48. Two sets of data consisting of 10 and 20 observations have same mean 8 with standard deviations of 1 and 2,
respectively. If the two data sets are combined, then the variance is
(A) 3
(B) 2
(C) 5
(D) 1.5
49. Match the List – I with List – II and choose the correct answer from the given codes :
50. CBD stands for
(A) Convention on Biological Diversity
(B) Conservation Biodiversity Development
(C) Conservation Association for Biodiversity and Management
(D) Cumulative Plan for Biological Diversity
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