PAPER-II ENVIRONMENTAL SCIENCE Signature and Name of Invigilator
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(Name) Roll (In words)
J 8 9 1 2

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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12. There is no negative marks for incorrect answers.



ENVIRONMENTAL SCIENCE
Paper II

Note This paper contains fifty objective
type questions, each question carrying two

marks. Attempt all the questions.

1. If the standard deviation of a population is 20 and the standard error of mean is then the sample size is

25


80


5


100



2. In a multiple regression model, the explained variance per d.f. is 50 and unexplained variance per d.f. is 10.
The F-ratio is

2.5


5


25


0.2



3. Which one of the following is random sampling method

Stratified Sampling


Cluster Sampling


Systematic Sampling


Judgement Sampling


not a


4. In the Gaussian Plume Model, the plume size is estimated considering buoyancy of exhaust gases, stack diameter, wind speed and stability of the atmosphere. The plume size .h depends on inside radius of stack as

.h . r
1/3



.h . r
2/3



.h . r


.h . r2



5. The acidity of normal rain water is due to

CO2


Cl2


NO2


SO2



6. Percent of water on the world's surface representing fresh water is

97


50


10


3



7. Concentration of CO2 in present day atmosphere is

220 ppm


280 ppm


360 ppm


390 ppm



8. Hardness of diamond is due to

Coordinate bonding


Covalent bonding


Electrovalent bonding


van der Waals forces



9. In biological systems sulphur is largely bound in

Lipids


Proteins


Nucleic acids


Proteins and nucleic acids



10. pH of 0.01 M HNO3 is

0.1 1


2 10



11. Which is a correct food chain in the Antarctic ecosystem

Phytoplankton Krill Carnivorous Plankton Emperor Penguin


Phytoplankton Krill Carnivorous Plankton Squid Elephant Seal Leopard Seal


Phytoplankton Herbivorous Zoo Plankton Carnivorous Plankton Adelic Penguin Emperor Penguin


Herbivorous Zoo Plankton Phytoplankton Carnivorous Plankton Elephant Seal Leopard Seal



12. Given below are two statements, one labelled as Assertion and the other labelled as Reason
Assertion The phosphorous cycle in an ecosystem is a sedimentary cycle.
Reason Phosphorous does not occur naturally as gas.

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.



13. Pyramid of trophic levels is always upright in case of

Biomass


Energy


Number


All of the above



14. Which of the following is a correct match

Periyar Kerala


Ranthambore M.P.


Panna U.P.


Bandhvgarh Bihar



15. Replacement of existing communities by any external condition is termed

Primary succession


Secondary succession


Autogenic succession


None of the above



16. The area where two major communities meet and blend together is termed as

Ecotype


Biotype


Ecotone


Meeting place



17. Indian wolf has become an important animal because

It's name appears in Red Data Book.


It is only an important member of food chain of almost all Indian forests.


Wild dogs disappeared due to their presence.


It has been chosen as a State animal.



18. Walkley and Black rapid titration method is used for the determination of

Organic carbon content of soil


Nitrate content of soil


Phosphate content of soil


Fluoride content of soil



19. Which one of the following is an endoenzyme in soil

Cellulase


Invertase


Protease


Dehydrogenase



20. Of the following humic groups which is not soluble in both acid and alkali

Fulvic acid


Humic acid


Humin


All of the above



21. The sources of thermal pollution are

Power plants


Cooling forests


Industrial effluents


All of the above



22. Which one of the following
radionuclides has the longest half life C14


Sr90



I131



Cs137





23. What is the importance of the 42nd Amendment to the Constitution brought in the year 1976

Insertion of Article 48-A


Insertion of Article 51-A


Insertion of Article 48-A and 51-A


None of the above



24. Who issues the Ecomark notification

Ministry of Environment and Forest, Govt. of India


Ministry of Human Health and Family Welfare, Govt. of India


Department of Science and Technology, Govt. of India


Bureau of Indian Standards



25. Which one of the following is a waste recycling method of solid waste management

Pelletisation


Composting


Incineration


Sanitary Landfill



26. A hazardous waste is characterised by

Ignitibility


Reactivity


Toxicity


All of the above



27. How many hot spots have been identified in the world and Indian Subcontinent respectively

17, 2


12, 3


35, 2


17, 3



28. Which one of the following chemical species of mercury is highly toxic to living system

Mercurous ion


Mercuric ion


Organo mercurials


Atomic mercury



29. Natural gas is composed primarily of

Methane


n-butane


n-octane


A mixture of n-octane and n-butane



30. Which of the following is true regarding the Leopold interaction matrix used in Environmental Impact Assessment Process

It can be expanded.


It can be contracted.


It can be contracted and expanded.


It cannot be contracted and expanded.



31. Which of the following can be considered in Environmental Risk Assessment

Exposure period


Potency of a toxic material


Quality of models


All of the above



32. In India, Environmental Impact Assessment report of a proposed river valley project after environmental clearance is applicable for a maximal period of how many years

5


10


30


2



33. An earthquake is rated as if its magnitude in Richter Scale is in the range of

4.0 4.9


7.0 7.9


6.0 6.9


5.0 5.9



34. What is the proportion of the frequency of occurrence of La Nina compared to El Nino

Half


One-third


Twice


Two-third



35. An element in soil will be considered as a trace element if its concentration is

1 2 wt


0.1 wt


2 wt


1 wt



36. Which of the following is correct about attribute data in Geographic Information System

Attributes are pieces of data that are connected or related to the points, lines or polygons mapped in the GIS.


Attribute data can be analysed to determine patterns of importance.


Attribute data is entered directly into a database where it is associated with element data.


All of the above



37. At Nadir, the LISS IV camera in IRS-P6 has a spatial resolution of

5.8 m


5.9 m


5.7 m


5.6 m



38. Which one of the following can be estimated by Flame Photometer

Sodium and Potassium


Cadmium and Cobalt


Chlorine and Bromine


Mercury and Arsenic



39. The contribution of COtowards
2 global warming has been estimated to be about

57 60%


60 75%


80 85%


45 55%



40. The principal components of photochemical smog in urban areas are

SO2 and NO2


SPM and CO


SPM and NO2


Hydrocarbons and Ozone



41. Match Lists I and II and choose the correct answer from the codes given below

List I List II
(Aerosol (Sources) Constituents)

Si 1. Gases in the ambient atmosphere


V 2. Natural sources

(iii)Benzo(a)pyrene 3. Combustion of certain kinds of fuel oil


Sulfuric acid 4. Incomplete droplets combustion



Codes


2 4 3 1


3 1 2 4


4 1 2 3


1 4 3 2



42. A river flowing at 20.0 m3/sec has a
tributary feeding into it with a flow rate of 5.0 m3/sec. Upstream from the point of junction. The fluoride concentration is 5 mg/L in the river and 10 mg/L in the tributary. Assuming fluoride to be conservative substance and rapid mixing in the river, the downstream concentration in the river is

6 mg/L


8 mg/L


8.5 mg/L


7.5 mg/L



43. The power obtained from a horizontal wind turbine operating at maximum efficiency is proportional to its diameter as
D2
D
D3/2

D

44. Noise of 90 dB for 8 hours represents 100% dose. If the noise of 93 dB is for 1 hour duration, it represents a dose of

25% 50%


75% 100%



45. Scale lengths associated with mesoscale phenomenon in atmosphere are typically in the range

10 500 m


1 200 km


100 1000 km


1000 10,000 km



46. When an atmosphere has an isothermal profile, it is

very stable


slightly stable


unstable


very unstable (turbulent)



47. The wavelength range of UV-C radiation is

320 400 nm


280 320 nm


100 1500 nm


240 280 nm



48. Lightening in the atmosphere produces

NO


CO


CO2


NH3



49. The maximum tidal energy potential in India is

in Gulf of Khambhat


in Gangetic delta in Sundarbans


along the coast of Odisha


along the coast of Chennai



50. The maximum theoretical efficiency of a silicon solar cell can be

45%


30%


12%


50%



Space For Rough Work


Paper-II 8
J-89-12