2012 Jun | ENVIRONMENTAL SCIENCE Paper – II | Previous year Question paper | Answer Key | Free download

ENVIRONMENTAL SCIENCE Paper – II

ENVIRONMENTAL SCIENCE Paper-II | Free Download | Pdf | 2012 Jun Question paper | Click here
ENVIRONMENTAL SCIENCE Paper-II | Free Download | Pdf | 2012 Jun Answer Key| Click here


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ENVIRONMENTAL SCIENCE Paper – II | Jun 2012

Note : This paper contains fifty (50) objective type questions, each question carrying two (2)

marks. Attempt all the questions.

1.If    the    standard    deviation    of    a population is 20 and the standard error of mean is 4, then the sample size is

(A) 25 (B) 80                         (C) 5               D (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

(A)   2.5          (B)    5            (C)    25          (D)   0.2

3.  Which one of the following is not a random sampling method?

(A)   Stratified Sampling

(B)    Cluster Sampling

(C)    Systematic Sampling

(D)   Judgement Sampling

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 (r) as

(A)  ∆h ∝ r  (B)  ∆h ∝ r^1/3                (C)   ∆h ∝ r^2/3                        (D)   ∆h ∝ r²

5. The acidity of normal rainwater is due to

(A) CO₂          (B) Cl₂            (C) NO²          (D)   SO₂

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

(A) 97             (B) 50                         (C) 10                         (D)   3

7. Concentration of CO2  in present day atmosphere is

(A)   ~ 220 ppm        (B)  ~ 280 ppm          (C)  ~ 360 ppm          (D)   ~ 390 ppm

8.  Hardness of diamond is due to

(A)   Coordinate bonding

(B)    Covalent bonding

(C)    Electrovalent bonding

(D)   van der Waals forces

9. In biological systems sulphur is largely bound in

(A)   Lipids

(B)    Proteins

(C)    Nucleic acids

(D)   Proteins and nucleic acids

10.    pH of 0.01 M HNO3 is

(A)   0.1                  (B)    1    (C)    2                     (D)   10

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

(A) Phytoplankton   –   Krill   – Carnivorous Plankton – Emperor Penguin

(B) Phytoplankton   –   Krill   – Carnivorous Plankton – Squid – Elephant Seal – Leopard Seal

(C)    Phytoplankton    –    Herbivorous Zoo Plankton – Carnivorous Plankton – Adelic Penguin – Emperor Penguin

(D) Herbivorous   Zoo         Plankton   – Phytoplankton    –      CarnivorousPlankton   –                   Elephant   Seal   – Leopard Seal

12.       Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R) :

Assertion (A) : The phosphorous cycle in an ecosystem is a sedimentary cycle.

Reason (R) : Phosphorous does not occur naturally as gas.

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

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

(C)    (A) is true, but (R) is false.

(D)   (A) is false, but (R) is true

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

(A)   Biomass                                                (B)    Energy            

(C)    Number                                                            (D)   All of the above

14. Which  of  the  following  is  a  correct match ?

(A)   Periyar – Kerala

(B)    Ranthambore – M.P.

(C)    Panna – U.P.

(D)   Bandhvgarh – Bihar

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

(A)   Primary succession                             (B)    Secondary succession

(C)    Autogenic succession                                    (D)   None of the above

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

(A) Ecotype               (B)    Biotype          

(C)    Ecotone            (D)   Meeting place

17.       Indian wolf has become an important animal because

(A)   It’s  name  appears  in  Red  Data Book.

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

(C)    Wild  dogs  disappeared  due  to their presence.

(D)   It  has  been  chosen  as  a  State animal.

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

(A)   Organic carbon content of soil

(B)    Nitrate content of soil

(C)    Phosphate content of soil

(D)   Fluoride content of soil

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

(A) Cellulase                         (B) Invertase                        

(C)    Protease                       (D)   Dehydrogenase

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

(A)   Fulvic acid (B)    Humic acid (C)    Humin

21.    The sources of thermal pollution are

(A)   Power plants                (B)    Cooling forests                      

(C)    Industrial effluents     (D)   All of the above

  

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

(A)   C14        (B)    Sr90      (C)    I131      (D)   Cs137

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

(A)   Insertion of Article 48-A

(B)    Insertion of Article 51-A (g)

(C)    Insertion  of  Article  48-A  and 51-A (g)

(D)   None of the above

24.       Who issues the Ecomark notification ?

(A)   Ministry   of   Environment   and Forest, Govt. of India

(B)    Ministry  of  Human  Health  and Family Welfare, Govt. of India

(C)    Department    of    Science    and Technology, Govt. of India

(D)   Bureau of Indian Standards

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

(A) Pelletisation       (B) Composting        (C)    Incineration (D)   Sanitary Landfill

            26.    A hazardous waste is characterised by

(A) Ignitibility          (B) Reactivity          

(C)    Toxicity                       (D)   All of the above

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

(A)   17, 2      (B)    12, 3      (C)    35, 2      (D)   17, 3

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

(A)   Mercurous ion

(B)    Mercuric ion

(C)    Organo mercurials

(D)   Atomic mercury

29.    Natural gas is composed primarily of

(A) Methane             (B) n-butane             

(C)    n-octane           (D)   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 ?

(A)   It can be expanded. (B)    It can be contracted.

(C)    It can be contracted and expanded.

(D)   It   cannot   be   contracted   and expanded.

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

(A)   Exposure period

(B)    Potency of a toxic material

(C)    Quality of models

(D)   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?

(A)   5             (B)  10            (C) 30                                     (D) 2

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

(A)   4.0 – 4.9 (B)    7.0 – 7.9 (C)    6.0 – 6.9 (D)   5.0 – 5.9

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

(A)   Half

(B)    One-third

(C)    Twice

(D)   Two-third

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

(A)      1 – 2 wt %

(B)      < 0.1 wt %

(C)      > 2 wt %

(D)      < 1 wt %

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

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

(B) Attribute data can be analysed to determine  patterns  of importance.

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

(D) All of the above

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

(A)   5.8 m (B)    5.9 m (C)    5.7 m                        (D)   5.6 m

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

A)   Sodium and Potassium (B)    Cadmium and Cobalt

(C)      Chlorine and Bromine (D) Mercury and Arsenic

39.       The   contribution   of   CO2    towards global warming has been estimated to be about

(A)   57 – 60% (B)    60 – 75% (C)    80 – 85% (D)   45 – 55%

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

(A)   SO2 and NO2                           (B)    SPM and CO

(C)    SPM and NO2                         (D)   Hydrocarbons and Ozone

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

List – I (AerosolConstituents)                                            List – II (Sources)

(i) Si                                                   1.  Gases in the ambient atmosphere

(ii) V                                                   2.  Natural sources

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

(iv) Sulfuric acid droplets             4.  Incomplete combustion

Codes :

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

            (A)      2          4          3          1

            (B)      3          1          2          4

(C)      4          1          2          3

 (D)     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

(A)   6 mg/L (B)    8 mg/L (C)    8.5 mg/L (D)   7.5 mg/L

43.       The power obtained from a horizontal wind turbine operating at maximum efficiency  is  proportional  to  its diameter (D) as

(A)   D                    (B)    D2             (C)    D3/2                      (D)      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

(A)   25%                (B)    50% (C)    75%                (D)   100%

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

(A)   10 – 500 m

(B)    1 – 200 km      

(C)      100 – 1000 km         

(D)      1000 – 10,000 km   

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

(A)   very stable

(B)    slightly stable

(C)    unstable

(D)   very unstable (turbulent)

47.    The    wavelength    range    of    UV-C radiation is

(A)   320 – 400 nm (B)    280 – 320 nm (C)    100 – 1500 nm (D)   240 – 280 nm

48.   Lightening in the atmosphere produces

(A) NO                       (B)  CO                       (C) CO2                     (D)   NH3

49.    The maximum tidal energy potential in India is

(A)   in Gulf of Khambhat

(B)    in Gangetic delta in Sundarbans

(C)    along the coast of Odisha

(D)   along the coast of Chennai

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

(A)      45%

(B)      30%

(C)      12%

(D)      50%