PAPER-II ENVIRONMENTAL SCIENCE Signature and Name of Invigilator
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(Name) Roll (In words)
J 8 9 1 1

Time 1 1/4 hours] [Maximum Marks 100




Number of Pages in this Booklet 8 Number of Questions in this Booklet 50 Instructions for the Candidates
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ENVIRONMENTAL SCIENCE
Paper II

Note This paper contains fifty objective type questions, each question carrying two
marks. Attempt all the questions.
1. Identify the correct sequence of energy flow through various levels of an ecosystem

Sun's energy . Primary producers . Carnivores


Sun's energy . Primary producers . Carnivores . Herbivores


Sun's energy . Herbivores . Primary producers


Sun's energy . Primary producers . Herbivores . Carnivores



2. When environmental lapse rate is more than dry adiabatic lapse rate, the atmosphere is said to be in

Stable state


Unstable state


Neutral state


Conditionally stable state



3. Which of the following accounts for nearly 75% of the available fresh water in the world

Groundwater


Glaciers


River water


Lakes



4. The summers in Taiga climatic zone are

hot, humid and long


warm and short


cool, rainy and short


hot and dry



5. Utilitarian conservation theory was established by

Roosevelt and Pinchot


John Muir


Rachel Carson


Brundtland



6. Ozone undergoes photolysis due to ultra-violet radiations of wavelength

315 nm


400 nm


500 nm


600 nm



7. Which of the following types of pesticides are least biodegradable

Organo chloro compounds


Organo phosphorous compounds


Organo carbamates


All of the above



8. MgSO4 can be expressed as

120 equivalent of CaCO3


117 equivalent of CaCO3


195 equivalent of CaCO3


84 equivalent of CaCO3



9. Cattle waste has COD several times higher than BOD because of

high levels of fibre


high levels of microflora


high levels of cellulose


high levels of fibre, cellulose and lignin



10. In urban areas, the main constituents of photochemical smog in winter season are

SO2 NO x PAN


Hydrocarbons CO PAN


Hydrocarbons SO2 PAN


Hydrocarbons NOx O3 PAN



11. Redox potential in soil is governed by

strong oxidizing agent


weak oxidizing agent


organic matter


soil particle size



12. The process of invasion is completed through the following stages

Migration and establishment of species in bare area


Migration, ecesis and aggregation


Ecesis and aggregation


Migration, aggregation and settlement of species



13. Which one is not matched correctly

Kaziranga Assam


Periyar Kerala


Ranthambore Rajasthan


Hemis High Himachal Altitude Pradesh



14. Hyporhric biodiversity is linked with

Ecotone of surface water and groundwater


Ecotone of terrestrial and aquatic ecosystem


Groundwater


Asian region



15. E. coli displays diauxic growth pattern when grown in a medium containing

glucose and fructose


glucose and citrate


glucose and lactose


glucose alone



16. El Nino effect refers to the periodic extension of warm equatorial current along which coast

Peru Coast


African Coast


East Coast of India


Somalia Coast



17. Which of the following options is correct for concentration of elements in sea water

Na Mg Ca


Ca Na> Mg


Mg >Na Ca


CO3 SO4 Cl



18. Land use planning requires which of the following base maps

Soil type map


Slope map


Soil depth map


All of the above



19. Gutenberg discontinuity is found at the depth of

333 km


700 km


1500 km


2900 km



20. Landslides are generally associated with heavy rainfall because

Water is universal solvent.


Water enhances chemical weathering.


Water increases the weight of overburden.


Water reduces the shear strength of rock.



21. The optimal pH for Methane production ranges between

7 to 7.2


5 to 5.6


8 to 9.5


2.3 to 4.5



22. Average life time and half life
(T½ of a radioactive substances are related as

t 1.44 T½


t 0.5 T½


t 0.63 T½


t 2 T½



23. The maximum contribution to world electricity generation from non-hydro renewable energy sources is from

Wind


Biomass


Solar PV


Geothermal



24. The maximum efficiency of a commercial solar photovoltaic cell attainable today is in the range

3 to 10


12 to 20


30 to 40


40 to 50



25. Which of the following does not lead to global warming

Stratospheric ozone


Tropospheric ozone


Black carbon aerosols


N2O



26. The instrument used for determination of transparency of water is

Spectrophotometer


Ekman dredge


Conductivity bridge


Sechhi disc



27. Which of the following is an aerobic waste water treatment method

Sludge digester


Septic tank


Percolating filter


Imhoff tank



28. Nitrogen Oxides consist of
x

NO NO2


NO NO2 N2O


NO NO2 N2O5


NO NO2 N2O+ N2O5



29. For controlling emission of particulates from thermal power plants, the vertical wires placed in between the grounded collector plates in an electrostatic precipitator are biased typically to voltages of

(100 V to 500


(20 kV to 100 kV)


(20 kV to 100 kV)


(100 V to 500



30. Noise levels of 60 dB imply atmospheric pressure perturbations of root-mean-square value corresponding to

200 µPa


2000 µPa


20,000 µPa


200,000 µPa



31. ISO 14040 is related to

Environmental audit


Energy audit


Cost benefit analysis


Life cycle analysis



32. Definition of Impact Assessment was given by

Kozlowski (1989)


Graham Smith (1993)


Heer and Hagerty (1977)


Bartlett (1989)



33. Assertion Environmental and social impact assessment never overlap with each other.
Reason Environmental and social impact assessment are effectively opposite ends of the same spectrum.

Both and are true and

is the correct explanation of


Both and are true but

is not the correct explanation of


is true but is false.


is false but is true.



34. One of the best known matrix methods for environmental impact assessment is

Leopold Matrix


Sphere Matrix


Saratoga Matrix


Component Interaction Method



35. The method for systematically evaluating alternative development schemes and weighing relevant social cost with social benefits is known as

Cost benefit analysis


Social cost benefit analysis


Social benefit cost analysis


Cost effectiveness analysis



36. Gases emitted from municipal landfill sites include

SO2 and CH4


NH4, CO, SO2, CH4


NH4, H2S, CO


CH4, H2S, CO2, NH4



37. The Air (Prevention and Control of Pollution) Act, 1981 was first amended in the year

1986 1987


1988 1990



38. Identify the correct sequence of materials in order of their heating values

Methane fuel oil coal wood


Fuel oil coal methane wood


Coal wood fuel oil garbage


Methane coal garbage wood



39. Urban air quality is basically decided by

CO, SPM, SO2, NO2, Surface ozone


SPM, NO2, SO2


SPM, NO2, CO


SPM, SO2, Surface ozone



40. If N is the population size at any given instant r its growth rate in an environment having carrying capacity the environmental resistance to population growth is given by
41. Which of the following statistical attributes is used to test the null hypothesis in Regression Analysis

Mean


Standard deviation


t-statistic
R2






42. A chimney of height is emitting plume of particles which follow Gaussian distribution. Assuming that the ground is a perfect reflector of particles, the maximum ground level concentration of particles varies with as

ah
ah-2




a
h
ah-3/2






43. The geometric mean of 5 and 40 is

16.66


25


31.6


10



44. The Eigen values of the matrix

N/K


N


1


K

...

11

11


...

are

1
1
2


N -tr

e

K N tr


e


K

45. In a simple regression model a ßx E (where the symbols have their usual meanings), the expectation value of is assumed
as

0




y


s


where s is standard
2 deviation
s2


46. In the Earth Summit at Rio de Janeiro, 1992, which of the following was not an agenda

Ozone depletion


Global warming


CO2 reduction targets


Biodiversity conservation



47. Assertion Most of the corporate sector in India has become conscious of the ethical dimensions pertaining to its impact on environment.
Reason Indian people are increasingly becoming aware of the environmental issues.


Codes

Both and are true and

is the correct explanation of



Both and are true but

is not the correct explanation of



is true but is false.


is false but is true.


48. 'Slash and Burn' or milpa farming is often blamed for

habitat destruction


forest destruction


hydrological imbalance


mine destruction


49. Assertion Climate change is going to increase social tensions in India.
Reason The frequency and intensity of the extreme weather events will have serious consequences for food security.

Codes

Both and are true and

is the correct explanation of


Both and are true but

is not the correct explanation of


is true but is false.


is false but is true.


50. Snow blindness is caused due to

Ultra-violet radiations


Excessive flux of visible radiations


Infra-red radiations


Microwave radiations


Space For Rough Work