1. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion Vertical velocity often equals or exceeds horizontal velocity in mesoscale meteorological systems.

Reason Rising thermals are susceptible to undergo non-hydrostatic processes such as buoyant acceleration or acceleration through a narrow mountain pass.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

2. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion Geostrophic wind velocity is independent of latitude.

Reason Geostrophic wind velocity is determined by pressure gradient force only.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

3. Mixing height during night is typically in the range few hundred metres 1 km – 2 km 2 km – 3 km 3 km – 4 km

4. At a given urban location, the temperature at an elevation of 25 m above ground is 15 °C. If the inversion conditions prevail and the environmental lapse rate is 1.25 °C per 100 the temperature at an elevation of 200 m will be 12.5 °C 17.5 °C 12.75 °C 17.25 °C

5. When the temperature of the atmosphere falls at a rate greater than the dry adiabatic lapse rate, the atmosphere is stable highly stable unstable conditionally unstable

6. Gross Primary Productivity of an ecosystem is net rate of carbon gain by the plant after respiration losses. total energy used to convert the sugar during growth. photosynthetic fixation rate of atmospheric carbon dioxide. rate of release of oxygen through respiration of a plant.

7. The oxygen atom species, which reacts with water to form hydroxyl radical, is produced by the photodissociation of O2 O3 NO2 H2O

8. Match the List – I and List – II given below

List – I List – II
(Element) (Classification)

a. Sodium i. Chalcogen

b. Calcium ii. Alkali Metal

c. Chromium iii. Alkaline Earth Element

d. Sulfur iv. Transition Element

Choose the correct answer

Codes a b c d

(1)ii iii iv i i ii iii iv

(3)iii i ii iv

(4)iv ii i iii

9. Identify the incorrect statement about carbon isotopes C-13 is less abundant in vegetation than in oceans. C-12 is most abundant in nature. C-14 is absent in fossil fuels. C-13 is used for carbon-dating.

10. Among the following insecticides, which one is relatively more soluble in water Aldicarb Carbaryl Malathion Aldrin

11. At 25 hydrogen ion concentration in an environmental aqueous solution is found to be 5 × 10–4 mol L–1. This implies that the concentration of hydroxyl ions is 2 × 10–3 mol L–1 1 × 10–7 mol L–1 2 × 10–11 mol L–1 2 × 10–19 mol L–1

12. Identify the incorrect statement about humus. Humus acts as a reservoir of nitrogen for plants. By decaying, humus supplies nitrogen to plants. Its rate of decay and rate of nitrogen release follow plant growth. Rate of nitrogen release to plants is slow during warm growing season and fast during winter months.

13. Match the List – I and List – II. Identify the correct answer from the codes given below

List – I List – II
(Terms) (Chromatographic action)

a. Effluent i. The eluted solute

b. Eluate ii. The mobile phase

c. Eluent iii. The solute-mobile phase mixture which exits the column

d. Eluite iv. The stream flowing out of the column

Codes a b c d i iii ii iv

(2)ii iv iii i

(3)iii i ii iv

(4)iv iii ii i

14. A textile industry effluent containing 1 × 10–6 mol L–1 of an organic dye has 0.6 absorbance in a cell of 1.0 cm path length. The molar extinction coefficient of the dye is –1–1 6 × 104 L mol–1 cm 6 × 10–7 L mol–1 cm –1–1 1.66 × 10–5 L mol–1 cm 6.0 × 106 L mol–1 cm

15. Characteristics of successful invasive plant species are

a. Rapid growth and early flowering.

b. High phenotypic plasticity

c. Production of large number of seeds

Choose the correct answer a only a and b only b and c only b and c

16. Drugs that prevent the formation of bacterial cell wall are Quinolones Beta-lactams Tetracyclines Aminoglycocides

17. As a result of El Nino, it has been observed that phytoplankton productivity increases in Eastern Indian Ocean around Indonesia and Gulf of Mexico. This increase is probably due to Increased rainfall More nutrient inflow Turbulence in surface waters

Codes and only and only and only and

18. Vermi composting process depends on Quality of organic resources Types of earthworms Moisture content of the organic wastes

Choose the correct answer only and only and only and

19. Photosynthesis in plants is associated with decrease in entropy increase in entropy increase in Gibbs free energy

Choose the correct answer only only and only and

20. The predominant bioparticulate allergens in the air are Insect debris and house dust mites Pollen grains and fungal spores Animal dander and house dust Wool particles and cockroach calyx

21. The enhancement of the fitness of a recipient individual by acts that reduce the evolutionary fitness of the donor individual is Amensalism Altruism Commonsalism Parasitism

22. The greater proportion of the edges in a national park indicates a less functional habitat highly functional habitat degraded habitat

Choose the correct answer only and only and only and

23. The change in species composition that is imposed by factors external to the biotic community is known as Autogenic succession Allogenic succession Xerarch Hydrarch

24. Which ecosystem type produces maximum litter mass Tropical rain forest Tropical seasonal forest Temperate deciduous forest Boreal forest

25. Cyclomorphism is a phenomenon observed in certain planktonic crustaceans and is generally attributed as a response to changes in environmental variables of water. ensure adaptive significance. growth, reproduction and sudden genetic change

Codes and only and only and only and

26. Microbes in the environment are likely to be

I. living in biofilms on surfaces.

II. non-culturable

III. living solitary and planktonic lines

Choose the correct code I only II and III only I and III only I and II only

27. Which magma type contains the greatest amount of silica Basaltic Andesitic Rhyolitic Peridotic

28. Match the List – I and List – II and choose the correct answer from the codes given below

List – I List – II
(Stratigraphic Unit) (Deposits)

a. Bailadila Group i. Mn

b. Nallamalai Group ii. Phosphorite

c. Udaipur Group iii. Banded Iron Formation

d. Sansar Group iv. Pb-Zn

Codes a b c d

(1)iii iv ii i

(2)iv i iii ii i ii iv iii

(4)ii iii i iv

29. Which group of following factors determine the discharge of a stream Width, length and depth Width, length and velocity Width, depth and velocity Length, depth and run-off

30. Which among the following zones has the highest erosion rate in the journey of a river Head water Potamon Mouth Sediment transforming zone

31. In the decreasing order of hardness on Moh’s scale, choose the correct sequence from the following Quartz, Feldspar, Calcite, Talc Feldspar, Calcite, Talc, Quartz Talc, Quartz, Feldspar, Calcite Quartz, Calcite, Feldspar, Talc

32. Wind transport of materials entails the following processes

I. Saltation

II. Reptation

III. Suspension

IV. Creep

Choose the correct answer II, III, IV II, III and IV only III and IV only I and II only

33. According to Darcy’s law for ground water movement, velocity is proportional to Hydraulic gradient. Square of hydraulic gradient. Square root of hydraulic gradient, Reciprocal of hydraulic gradient.

34. Which of the following types of coal has maximum ash content Anthracite Sub-Bituminous Lignite High volatile Bituminous

35. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion The amount of energy available in a single fusion event is small compared to a fission event.

Reason Isotopes of hydrogen are much lighter than uranium. Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

36. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion The thermal efficiency of nuclear reactors is lower than that of fossil fuelled steam plants.

Reason Temperature of water generating stream in a nuclear reactor has relatively lower values compared to fossil fuelled steam plants.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

37. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion Natural gas contributes less to smog formation than gasoline.

Reason Unburnt CH4 molecules are considerably less reactive with respect to the free radical chemistry for smog than the hydrocarbon molecules with more than one C atom.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

38. Consider ocean waves of amplitude 2.0 m and wavelength 200 m. Assuming the gravity to be the only active force, the power available per metre perpendicular to the propagation of the wave is 86.24 kW m–1 172.48 kW m–1 344.90 kW m–1 800.00 kW m–1

39. A wind mill has cross-sectional area 25.0 m2. The wind speed is 6.0 m/s. What will be the power generated by the wind mill in the Betz limit 2.064 kW 3.483 kW 11.162 kW 18.321 kW

40. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion The power output from an OTEC system installed at a tropical site is steady.

Reason At tropical sites, the temperatures of warm surface water and cold water in the depth of ocean hardly vary from season to season. Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

41. An electric power plant based on solar energy uses collectors with concentrators which can achieve temperature of about 700 °C to operate a heat engine to generate electricity. If the solar insolation is 1 kW/m2, how much total collector area will be required to supply on average 10 MW of electricity (Take ambient air temperature to be 25 5.15 × 10^3 m^2 1.44 × 10^3 m^2 3.18 × 10^3 10.61 × 10^3 m^2

42. The potency factor of CHCl3 is 6.1 × 10^–3 kg-day/mg. The concentration in drinking water that would result in 2 × 10^–6 risk for a 70-kg man, who drinks 2L/day throughout of his life, is 11.4 µg/L 20.6 µg/L 6 µg/L 25 µg/L

43. Which of the following compounds used for disinfection of water is not stable but is prepared in situ Cl2 Ca(OCl)2 NaOCl HOCl

44. Identify the incorrect statement from the following regarding soil pollution by heavy metals Soils act as a sink for heavy metals. Humic materials have great affinity for heavy metal cations. Humic materials extract heavy metals from soil water by forming complexes. Complexes formed by humic acids are normally water soluble.

45. A point source of noise produces a sound of 60 dB at a distance of 10 m from it. If the sound is measured at a distance of 40 what will be its value 48 dB 54 dB 57 dB 44 dB

46. Identify the incorrect statement with regard to water purification by coagulation. Particles suspended in water are in colloidal form. Suspended particles carry a positive charge. Suspended particles due to similar charge repel each other. When alum is added it works as a coagulant.

47. In relation to drinking water source without conventional treatment but after disinfection, water parameters and their permissible values are given in the lists given below Match the List – I and List – II. Identify the correct answer from the codes given below

List – I List – II
(Water parameters) (Permissible values)

a. Total coliform organism MPN i. 6.5 – 8.5 per 100 ml

b. pH ii. 50 per 100 mL

c. DO iii. 2 mg/L or less

d. BOD days, 20 iv. 6 mg/L or more

Codes a b c d ii i iv iii ii i iii iv

(3)iii iv ii i

(4)iv ii iii i

48. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion Ozone depletion is much less over arctic stratosphere than over Antarctic stratosphere.

Reason Antarctic atmosphere is on an average about 10 °C cooler than the arctic stratosphere.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

49. Match the List – I and List – II. Identify the correct answer from the codes given below

List – I List – II
(Water type) (Conductivity (µS cm–1))

a. Fresh water i. 500

b. Clean tap water ii. 300

c. Clean upland river iii. 60 – 100

d. Organically enriched river iv. 2 – 4

Codes a b c d

(1)iv iii ii i i iv iii ii ii i iv iii

(4)iii ii i iv

50. Match the List – I and List – II. Identify the correct answer from the codes given below

List – I List – II
(Auditing types) (Set of terms)

a. Implementation audit i. External review of the procedures used

b. Performance audit ii. Compare actual with predicted impacts

c. Project impact audit iii. To cover full operation

d. Procedures audit iv. To cover a start-up

Codes a b c d iii iv i ii

(2) iv iii ii i

(3) i ii iii iv

(4) ii iii iv i

51. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion The ecological restoration is a difficult proposition both in principle and in practice.

Reason Identity and population sizes of plants and animals once present at a particular site are largely unknown.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

52. During the EIA process under the EIA notification of September 14, 2006, no public hearing is required for all category projects all ‘B1’ category projects all ‘B2’ category projects

Choose the correct code only and only and only only

53. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion Evaporation of surface water is reduced due to black carbon in atmosphere.

Reason Presence of aerosols having black carbon is responsible for dimming effect.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

54. Match the List – I and List – II. Identify the correct answer from the codes given below

List – I List – II
(Methods)(Description)

a. Network Method i. Possible impacts by composite environmental parameters.

b. Overlays Method ii. Structured approaches by involving scaling-weighing
techniques.

c. Checklists Method iii. Environmental systems as a complex web of relationships.

d. Adhoc Method iv. Spatial distribution of environmental impacts using GIS.

Codes b c d

(1) iv iii ii i

(2) i ii iii iv

(3) iv i iii ii

(4) iii iv ii i

55. In environmental Impact Assessment, the baseline studies describe the socio-economic mapping of the area. consequences of the development activity. assessment of the risk involved during project implementation. environmental setting existing in the project area.

56. An ecosystem restoration project should have the outcomes which are

I. Specific

II. Measurable

III. General

IV. Realistic

V. Time bound

Choose the correct code II, III, V II, IV, V II, III, IV, V II, III, IV

57. When applied to field populations, Lotka-Volterra equations suffer from the following

I. Competition coefficients are assumed to be constant.

II. Carrying capacity is assumed to be constant.

III. There are no time lags.

IV. Maximal rate of increase is assumed to be constant. Choose the correct answer I and II only II and III only II, III and IV only II, III and IV

58. In a city, the daily per capita inhalation values of contaminated air over a period of 5 days are 6.3, 6.3, 6.2, 6.4 and 5.8, respectively. The sample mean with standard deviation of the data is 6.2 0.02 6.2 0.23 6.0 0.15 6.2 0.18

59. The population of fish in a pond follows the logistic equation dN/dt 0.1N-0.001N^2

What is the maximum sustainable yield 100 50
(3) 25 200

60. Given below are two statements. One labelled as Assertion and the other labelled as Reason

Assertion For power stations and polluting industries, tall stacks are installed.

Reason The maximum ground level concentration of a pollutant released from a stack is inversely proportion to the height of the stack.

Choose the correct answer Both and are correct and is the correct explanation of Both and are correct and is not the correct explanation of is true, but is false. is false and is true.

61. Consider a box model for an airshed over a city and assume that the initial concentration of a pollutant is zero and that the air entering the box is clean. If the length of the box is 10 km and the wind speed along the length of the box is 5 what is the time taken for the pollutant concentration to reach 95% of its final value 1 h 40 minutes 1 h 7 minutes 33 minutes 20 seconds 2 h 13 minutes 20 seconds –

62. For a sample size n 16, the mean value and standard deviation are found to be 5.667 and 0.934, respectively. If the population mean is µ 5.2, then t – statistic is 0.5 0.47 1.76 2.0

63. Which of the following are sources of the greenhouse gas methane Coal mining areas Ruminants Wetlands Low land paddy

Choose the correct answer and only and only and only and

64. Which of the following convention/protocols/treaties is legally binding on the signatory countries Basel Convention Montreal Protocol Kyoto Protocol Paris Agreement

65. For untreated municipal wastewater, BOD/COD ratio is in the range

(1) 1.3 – 3 0.3 – 0.8 3.0 – 6.5 10

66. Organic wetland soils have


I. High porosity

II. Low density

III. High Ion exchange capacity IV. Low nutrient availability

Choose the right answer II, III, IV II, III, IV only III, IV only II only

67. Consider following statements about the ozone hole ?

I. Ozone formation and destruction keeps on happening.

II. Ozone destruction rate is higher than its formation rate.

III. Ozone destruction rate is equal to its formation rate.

Choose the correct answer I only I and II only I and III only III only

68. Consider following statements about an estuary

I. Estuary is the ecotonal region between fresh water and oceanic water.

II. This area is highly productive.

III. This area is highly unproductive.

Choose the correct answer I only I and II only III only I and III only

69. The ionic species, O O2 and N2 are found generally in Troposphere Stratosphere Mesosphere Heterosphere

70. As part of recently signed international agreement on phasing out synthetic hydrofluorocarbons India will start phasing them out from the year 2019 2024 2028 2032

71. In the tropospheric ozone formation reaction sequence, which of the following chemical species does not act as a catalyst OH HO2 NO2 O2

72. Which of the following are useful indicators of pollution potential of organic effluents Total Organic Carbon Biological Oxygen Demand Turbidity Conductivity

Choose the correct code and only and only and only and

73. Which of the following power plants releases radioactive materials as well as hazardous metals such as lead and arsenic under normal operating conditions Nuclear power plant Solar power installations Hydro power Coal based thermal power plants

74. Match the List-I and List-II. Identify the correct answer from the codes given below

List – I List – II
(Convention) (Purpose)

a. Paris Convention 1992 i. Transboundary Movement of Waste

b. Vienna Convention 1985 ii. Protection of Marine Environment

c. Bamako Convention 1998 iii. Protection of ozone layer

d. Basel convention 1992 iv. Ban on import of hazardous waste to Africa

Codes a b c d

(1)ii iii iv i

(2)iii iv i ii

(3)iv i ii iii i ii iii iv

75. Match the List-I and List-II. Identify the correct answer from the codes given below

List – I List – II
(Colour Codes) (Hospital Wastes)

a. Yellow Bags i. Infected metal sharps

b. Red Bags ii. Outdated Medicine bottles

c. Blue Bags iii. Used Catheters

d. Black Carboy iv. Infectious waste placenta

Codes a b c d

(1)iv iii ii i

(2)iii ii i iv ii i iv iii i iv iii ii