PAPER-II ENVIRONMENTAL SCIENCE Signature and Name of Invigilator

1. Mesoscale Meteorological Phenomena occur over areas of horizontal distance in the range

100 200 km


1 100 km


10 50 km


1 10 km

2. The Indian monsoon period is from

October to November


December to February


June to September


March to May

3. Which of the following is not a reactive oxygen species

Hydrogen peroxide


Hydroxyl ion


Singlet oxygen


Superoxide anion


4. If air quality standard for carbon monoxide is 9.0 ppmV, the percentage as in mg/m3 at 1 atm. at 25 °C is

10.3 mg/m3


15.2 mg/m3


20.0 mg/m3


5.6 mg/m3

5. Azaridine, Ethylene dibromide, Bis(chloromethyl) ether are


Alkylating agents


Hydrocarbons


Hydrazines


Aromatic amines

6. Normality of 0.25 M phosphoric acid is


0.25


0.50


0.75


2.50

7. Match List I with List II and choose the correct answer from the codes given below

List I (Air Pollutants) List II (Sources Activities)

a. Carbon monoxide 1. Coal burning

b. Nitrogen oxide 2. Cigarette Smoking

c. Sulphur dioxide 3. Chemical reaction with VOCs

d. Ozone 4. Power and Industrial Plant

Codes

a b c d

2 4 1 3


1 2 3 4


3 1 4 2


4 3 2 1



8. The gaseous material which is used for the synthesis of Methyl isocyanate is

(A)Chloranil


(B)Sevin


(C)Phosgene


(D)Chlorine



9. During the determination of COD, sulphanilic acid is added, because

maintains the acidic nature


precipitates the mercury ions


oxidises nitrites to nitrates


reacts with ferrous ammonium sulphate



10. Which year was declared as International Year of Biodiversity


(A)2002


(B)2010


(C)2020


(D)1972



11. The forest biome characterised by 3-4 tree species/km2 is


(A)Tropical


(B)Temperate


(C)Boreal


(D)Taiga



12. Which of the following is a type of biodiversity extinction caused primarily due to anthropogenic activities


(A)Carboniferous rain forest collapse


(B)Permian Triassic extinction


(C)Cretaceous paleogene extinction


(D)Holocene extinction



13. The chemical used in a fermenter with molasses as a substrate is


(A)Diammonium sulphate


(B)Diammonium phosphate


(C)Diammonium nitrate


(D)Diammonium chloride



14. Which of the following is an example of lotic ecosystem


(A)Stream ecosystem


(B)Pond ecosystem


(C)Bog ecosystem


(D)Wetland ecosystem



15. Which pyramid is always straight


(A)Pyramid of biomass


(B)Pyramid of number


(C)Pyramid of energy


(D)Pyramid of number and biomass



16. Which of the following type of materials present in a landslide suggest that the movement was rotational

(A)Rock flow, Debris flow, Earth flow


(B)Rock slump, Debris slump, Earth slump


(C)Rockfall, Debris fall, Earth fall


(D)Rock topple, Debris topple, Earth topple



17. Which of the following parameters is not a good indicator of contamination in ground water


(A)BOD


(B)Nitrates


(C)Silica


(D)Chlorides



18. On an aerial photograph, the distance between the principal point and the conjugate principal point is called


(A)Relief


(B)Tilt


(C)Photo-base


(D)Focal length



19. An equatorial west to east remote sensing satellite orbiting the earth at an altitude of 36,000 km is called

(A)Sun-synchronous satellite


(B)Geostationary satellite


(C)Space shuttle


(D)Stereo imager



20. Which state of Cr (Chromium) is most toxic














21. Assertion Groundwater may get seriously contaminated in coastal areas.

Reason Groundwater overdrafts near coastal areas can contaminate groundwater supplies by allowing salt water to intrude into freshwater aquifers.


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 and is false.


is false and is true.



22. Assertion Tropical and subtropical seas are most suitable for OTEC.

Reason There is a certain minimum vertical gradient 25 required for OTEC to become feasible.


Codes

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


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


is true, but is false.


is false, but is true.



23. On burning a certain amount of fuel a total of 500 million tonnes of CO2 is released to the atmosphere. If the entire amount of CO2 remains in the
atmosphere, what will be the rise in the concentration of CO2 in ppm

0.236 ppm


0.128 ppm


2.312 ppm


1.216 ppm



24. A thermal power station has a heat rate of 12 mJ/kWh. Its thermal efficiency is















25. Assume that world coal production is 6.1 billion tons per year and estimated total recoverable resources of coal is 1.1 trillion tons. How long it would take to use up those reserves at current rate of production

180 years


150 years


120 years


90 years



26. In a salt gradient solar pond, the salinity generally varies from top to bottom of the pond as

to 20%


10% to 30%


20% to 35%


20% to 40%



27. Which region among the following is not Atmospheric Brown Cloud hotspot

(A)East-Asia


(B)South Africa


(C)Amazon Basin in South America


(D)Australia



28. Prolonged exposure to high levels of noise causes

(i)Hearing loss

(ii)Constriction of blood vessels

(iii)Gastric ulcers

(iv)Toxicity

Identify the correct answer


and only


and only


and only


and



29. Azolla pinnata is a

(A)Blue green algae


(B)Green algae


(C)Red algae


(D)Fern



30. Assertion Eruption of the volcano Mt. Pinatobu in 1991 spewed sulphur clouds into the upper reaches of the atmosphere. The following three years were cooler.

Reason Sulphate aerosols reflect sunlight away from the Earth.


Codes

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


(B)Both and are correct and is not correct explanation of


is correct is incorrect.


(D)Both and are incorrect.



31. Photolysis of NO2 occurs due to radiations of wavelength

600 nm


550 nm


480 nm


390 nm



32. The efficiency of removing SO2 from
the flue gas by limestone in wet scrubbers can be as high as














33. The depth of the oxidation ponds is typically










(D)10-20m



34. In EIA the baseline data describes

(A)The environmental consequences by mapping


(B)Existing environmental status of the identified study area


(C)Assessment of risk on the basis of proposal


(D)Demographic and socio­economic data



35. Which one of the following does not belong to EIA methods used for assessing the impacts of developmental activities on the environment


(A)Checklist


(B)Adhoc


(C)Network


(D)Flexible



36. The EIA report of a hydro power project would be valid up to how many years after the environmental clearance of the project


years


years


years


years



37. If in the screening stage of EIA, the impact level of a developmental project is not discernible, then what step should be adopted

(A)Scoping stage is to be followed.


rapid EIA study is to be conducted.


(C)Detail EIA study is to be conducted.


(D)The project should be given Environmental Clearance.



38. The Committee which reviews the Environmental Impact Assessment and Environmental Management plan reports of a developmental project in Ministry of Environment and Forest is called

(A)Project Assessment Committee


(B)Project Appraisal Committee


(C)Project Evaluation Committee


(D)Project Estimate Committee



39. In a typical municipal solid waste, least percentage of Ash is found in

(A)Textiles


(B)Plastic


(C)Leather


(D)Rubber



40. Highly inflammable liquid/chemicals have flash point

(A)lower than 23 °C


(B)between 23 and 26 °C


(C)between 27 and 31 °C


(D)between 32 and 40 °C



41. Which one of the following does not contribute to climate change







(C)SF6


(D)HFCs



42. A population in an ecosystem follows logistic growth curve. If the carrying capacity of the system is the growth realisation factor is


X/X


X/K


X/K2





43. Which one of the following conditions would indicate that the dataset is not bell shaped

(A)The mean is much smaller than median


(B)The range is equal to five times the standard deviation.


(C)The range is larger than interquartile range.


(D)The range is twice the standard deviation.



44. For degrees of freedom the mean of the t-distribution is

(A)Zero





(C)depends on df






45. Which of the following is an eigen value of the matrix


4


2


0


1


3

46. Suppose a 70 kg person drinks 2L of water everyday for 70 years with a chloroform concentration of 0.10 mg/L (the drinking water standard), upper bound cancer risk for these individual will be

17 in 1 million


25 in 1 million


37 in 1 million


5 in 1 million


47. What is Ecomark

(A)Label given to recycled products


(B)Label given to an environment friendly products


(C)Land mark indicating the boundaries of bioparks


(D)Label given to non-recyclable products



48. An important source of Arsenic in Municipal Solid Water is

(A)Pigments in plastics


(B)Rubber products


(C)Batteries


(D)Household pesticides



49. Which of the following is not a non formal Environment Education and Awareness Programme

Global Learning and Observations to Benefit the Environment (GLOBE).


National Environment Awareness Campaign (NEAC).


Eco-clubs


Environmental Education in School System


50. REDD stands for


(A)Recurring Emission from Deforestation and Forest Degradation


(B)Reducing Environmental Degradation and Forest Degradation


(C)Reducing Emissions from Deforestation and Forest Degradation


(D)Reducing Emissions from Degradable Deposits of Wastes