PAPER-II ENVIRONMENTAL SCIENCE Signature and Name of Invigilator

1. What are the steps necessary for sustainable management of renewable resources


Avoiding over-exploitation and pollution of biotic systems.


Strengthening the resource base and augmenting regenerability of biotic systems.


Use of alternative resources.


All of these.
2. Fluxes of heat, water vapour and momentum are constant in


upper atmosphere


middle atmosphere


Ekman layer


surface boundary layer
3. Inversions occur when atmosphere is


unstable


neutral


slightly stable


most stable
4. When one species limits access of another species to a resource regardless of whether the resource is abundant or scarce, it is called


interspecific competition


intraspecific competition


interference competition


exploitative competition
5. Nanda Devi and Sunderbans are examples of Indian


National Parks


Sanctuaries


International heritage areas


Biosphere reserves
6. Match the List I and II and select the correct answer from the codes given below the lists

List I (Analytical techniques) List II (Measured items)
XRF 1. Functional groups
Nephelometry 2. Elements
IR spectroscopy 3. Turbidity
UV-visible spectroscopy 4. Aromatics

Codes



4 2 3 1


1 3 4 2


3 2 4 1


2 3 1 4

7. The pH of a 0.001 M solution of HCl is


2


4


3


1

8. The primitive atmosphere of earth consisted of


CO2, NO2, NH3, SO2


H2, NH3, CH4, H2O


CO, N2O3, SO3, H3N


He, Ne, Ar, Kr


9. Which of the following is the major source of mercury pollution in India


(A)Coal based thermal power plants


(B)Pesticides


(C)Dental amalgam fillings


(D)Electrical and electronic gadgets



10. Nitrite causes methaemoglobinemia by

(A)oxidizing membrane proteins


(B)reacting with calcium of bones


(C)oxidizing haemoglobin


(D)oxidizing membrane lipids



11. Solubility of a sparingly soluble salt of the type AB is related to the solubility product by the relation

S K2SP


S 2 KSP


S root KSP


S KSP

12. The amount of biomass which can be sustained under steady state condition of an ecosystem is termed as

(A)Primary productivity


(B)System homeostasis


(C)Sustainable yield


(D)Carrying capacity



13. Which of the following regions generally possess large diversity in their species composition

(A)Arctic regions


(B)Antarctic regions


(C)Snow-clad mountains


(D)Subtropical regions



14. Match the items under List I and List II and select the correct answer using codes given below

List I List II

Tissue culture technique Green revolution
Vermiculture technique Storage of propagules
Breeding technique (iii). Micropropagation
Cryo preservation technique Organic farming

Codes















15. Successive increase in concentration of some chemicals through different food level organisms is called

(A)Biogeochemical cycle


(B)Biological magnification


(C)Chemical production


(D)Biodegradation



16. Which of the following is a correct sequence found in a grassland ecosystem

(A)Grasses Diatoms deer


(B)Grasses rabbit wolves tiger


(C)Trees birds hawks wolves


(D)Grasses snakes deer dog



17. Reservoir triggered seismicity in case of hydro power projects with large pondage is most likely to occur when

thrust fault passes through the reservoir


strike-slip fault passes through the reservoir


Large flood strikes the project


Final reservoir level drops



18. Where the amplitude of Tsunami waves would be maximum

Deep Ocean


(B)Near the Coast


Flood Plains


Mid Oceanic Ridges



19. Given below are scales of four topographic maps. Maps of which scale will have more clarity

50,000


25,000


250,000


1,000,000



20. Soil surveys involve which of the following

(A)Soil series mapping


(B)Soil depth mapping


(C)Soil horizons mapping


(D)All of these



21. As we go down the discontinuous Bowen's reaction series (Olivine Pyroxene Amphibole Biotite) the Al ratio increases from

to 1


to 2


to 3


to 4


22. The maximum value of power coefficient for a wind turbine can be


0.59


0.49


0.92

0.72

23. Average value of solar insolation at the earth's surface is

250


350


450

550


24. Fuel cells are devises that generate electricity by converting the energy released by

(A)electrochemical reactions without going through combustion process.


(B)biochemical reactions without going through combustion process.


(C)electrochemical reactions involving combustion process


(D)biochemical reactions involving combustion process



25. Chemically coal is composed of

(i)Carbon

(ii)Hydrogen

Oxygen

(iv)Sulphur and or Nitrogen


(A)All of above


(B)Only and


(C)Only and


(D)Only and



26. Which of the following gases has the maximum global warming potential

(A)Carbon-di-oxide


(B)Methane


(C)Nitrous oxide


(D)Water vapour



27. Acid rain has pH

7.6


7


5.6


1.6



28. Which of the following gases facilitates formation of tropospheric ozone

(A)NO2


(B)SO2





(D)NH3



29. The sound power from a voice shouting is 0.001 Watt. The sound level in dB is

dB


dB


dB


(D)120 dB



30. According to WHO maximum permissible level of iron in drinking water is

mg/L


mg/L


mg/L


mg/L



31. The particle sizes associated with ambient aerosols in the atmosphere have the range

100 µm


10 µm


5 µm


1 µm



32. An aquatic system is essentially a single phase system while terrestrial system is

(A)two phase system


(B)three phase system


(C)four phase system


(D)multiple phase system higher than having four phases



33. For efficient crop productivity, the level of K in soils should, respectively, be

300, 80 and 360


50, 15 and 120


100, 30 and 180


50 and 240



34. Identify the correct sequence of stages of obtaining Environmental clearance for new projects

(A)Appraisal, Screening, Scoping, Public Consultation


(B)Screening, Public Consultation, Scoping, Appraisal


(C)Screening, Appraisal, Scoping, Public Consultation


(D)Screening, Scoping, Public Consultation, Appraisal



35. Assertion Cost benefit analysis converts the benefits from the development, damages and control measures into monetary values.

Reason Cost benefit analysis compares the cost of damage caused by developmental activity with the cost of control measures adopted and provides the optimum solution for a given environmental quality.

Which one of the following codes is correct


Codes

(A)Both and are true and is the correct explanation of


(B)Both and are true, but is not the correct explanation of


is true but is false.


is false but is true.


36. Match the items in List I with List II and select the correct answers using codes given below

List I (Developmental project) List II (Validity time period for Environmental Impact Assessment Report)

Mining Projects 10 years
River Valley Projects 30 years
Area Development Projects 5 years
Other Projects Limited period

Codes














37. Match the List I and List II. Identify the correct answer from the codes given below the lists

List I (Domain) List II (Effects)

Socioeconomics Barrier to travel corridors
Wildlife Employment opportunities
Water quality Erosivity Erodability
Soil environment BOD and COD

Codes
















38. Hazardous substances have the following attributes

(A)Ignitability


(B)Ignitability, Reactivity and Corrosivity


(C)Reactivity and Toxicity


(D)Corrosivity and Toxicity



39. Among bio-medical wastes, human anatomical wastes fall under category














40. To test whether there is a significant difference between the means of two sets of observations, one employs the following statistical technique

(A)Regression


pie2 test (chi square test)


(C)t-test


(D)F-test



41. For any finite set of positive numbers, which is the correct relationship involving Harmonic Mean Geometric Mean and Arithmetic Mean

GM AM


GM HM


HM GM


HM AM



42. The population of an ecosystem follows logistic growth. If K is its carrying capacity, then the environmental resistance is










NK

43. For the following Poisson distribution

2x X 1,2,……

the value of the mean is















44. In the Gaussian Plume Model, the plume rise, under neutral or unstable atmospheric conditions, varies with the average wind speed m/sec) at stack height as










1/3


45. Which of the following steps can be used to raise the assimilative capacity of natural systems

(A)Turn barren land into eutrophic system.


(B)Avoid concentration of polluting industry at a particular place.


(C)Both and


(D)None of these.



46. Kyoto Protocol on climate change was envisaged in which year

(A)1992


(B)1994


(C)1997


(D)2002



47. About what percentage of earth's drylands are deserts

20%


26%


36%


53%



48. 'Ring of Fire' surrounds which ocean

(A)Indian Ocean


(B)Atlantic Ocean


(C)Arctic Ocean


(D)Pacific Ocean



49. Assertion Available data suggest that the first cells on earth were anaerobic heterotrophs.

Reason In the beginning, the earth's atmosphere probably lacked free oxygen.
Identify the correct answer


Codes

Both and are true and is the correct explanation of


Both and are true and is not the correct explanation of


is true and is false.


is false and is true.


50. Chemical formula for CFC-113 is

Cl2F2


Cl3F3


Cl3F3


Cl2F3