50 Objectives type questions on environmental science

1. Which of the following statement about Fjord is incorrect?

A. Most Fjords were formed due to raise in sea level after the melting of Pleistocene ice

B. It is an emergent coast that was originally submerged

C. It is a long narrow inlet of the sea bound by steep slopes

D. It is a glaciated valley that has been inundated by the sea

3. Residence time of water molecule in the ocean is:

A. 3.5 years

B. 3.5 million years

C. 35 years

D. 35000 years

4. Hyperplasia means:

A. excessive motility of a muscle

B. Voracious eating

C. Abnormal increase in number of cells

D. An increase in size of a cell

5. Carbon dioxide absorbs radiation in the range:

A. 5.5 and 7 microns

B. Greater than 27 microns

C. 8 to 13 microns

D. 0.1 to 30 microns

6. Sodium is usually estimated by which of the following analytical technique:

A. Flame Photometry

B. Coulometry

C. High pressure liquid chromotography

D. Visible spectrophotometry

7. Which combination of the following elements constitutes a major portion of earth crust:

A. Oxygen and Silicon

B. Oxygen and Iron

C. Silicon and Iron

D. Aluminium and Iron

8. Assertion (A): Chlorofluorocarbons deplete ozone.

Reason (R): These compounds contain Chlorine, Bromine and Fluorine.

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

10. Maximum Density of water is at:

A. 4°C

B. 0°C

C. 100°C

D. 272°C

11. The cause of lung cancer Mesothalemia is:

A. Asbestos

B. Arsenic

C. Mercury

D. Chromium

12. Which of the following pattern of evolution accounts for all the diversity present on earth today?

A .Microevolution

B. Megaevolution

C. Biodiversity

D. Speciation

13. Group of individuals of the same species that share common attributes are called:

A. Community

B. Population

C. Ecotype

D. Society

14. Which one of the following is the correct food chain?

A. Algae -> Daphnia -> Dragon Fly Nymph -» Newt -» Grass Snake

B. Daphnia -» Dragon Fly Nymph -> Newt -» Algae -> Grass Snake

C. Grass Snake -> Newt -» Dragon Fly Nymph Daphnia Algae

D. Newt -» Grass Snake -» Dragon Fly Nymph -» Algae -> Daphnia

16 . Assertion (A): Monsoonal rainfall is very high both on the west coast and northeast India.

Reason (R): The duration of monsoon over west coast and northeast India is longer than other parts of India.

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

19. Which one of the following statements regarding El-NINO is NOT true?

A. It is an extension of equatorial current towards the western coast of South America.

B. It is an occasional warm current leading to an increase of about 10°C in subsurface water temperature.

C. It develops as temporary replacement of usual cold Peruvian Current.

D. It causes an increase in plankton thriving in cold Peruvian current.

20. The process of alluviation indicates:

A .Removal of particles from the upper layer of soil

B. Removal of particles from lower layer of soil

C. Deposition of soil particles in sub-soil layer

D. Transportation of soil particles in the B-horizon

21. Which one of the following is the cleanest source of energy?

A. Hydropower

B. Fossil fuel

C. Nuclear power

D. Wind energy

22. Match the items in List – I with List – II and select the correct answer using codes given below:

List I List – II

(a) CFC (i) Bhopal Gas Tragedy

(b) C0₂ (ii) Global Warming

(c) BOD (iii) Ozone depletion

(d) MIC (iv) Water pollution Code:

(a) (b) (c) (d)

A. (iii) (ii) (iv) (i)

B. (iv) (iii) (i) (ii)

C. (i) (ii) (iii) (iv)

D. (iv) (iii) (ii) (i)

23. The global warming efficiency of a CFC molecule in relation to a CO-, molecule is higher by a factor of:

A. 125

B. 25

C. 20,000

D. 1500

24. Arsenic problem in India is primarily due to:

A. Overexploitation of arsenopyrite in the hinterland

B. Overexploitation of coal in Bihar and Bengal

C. Overexploitation of ground water in the affected areas

D. Overexploitation of surface water in the affected areas

25. Acid rain is caused by:

A. CO and CO₂,

B. SO_{2 ,}and 0₂

C. S0₂ and NO”₂

D. NO₂ and O₂

Image Source: organicconceptions.com/wp-content/uploads/2014/06/qa.jpg

26. What will be the outcome of Eutrophication of surface waters?

A. Overproduction of biomass

B. Decrease in nitrogen concentration

C. Decrease in phosphorus concentration

D. Decrease in both nitrogen and phosphorus concentrations.

27. Assertion (A): Negatively charged soil particles attract positive ions like Ca⁺⁺ and Mg⁺⁺

Reason (R): The attraction keeps the ions at soil level for ready availability.

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

29. Cost Benefit analysis is required in case of proposals involving clearance of forest land:

A. Greater than 1Oha but less than 20ha

B. Greater than 20ha

C. Greater than 5ha but less than 1Oha

D. Greater than 40ha only

30. Ecologically sensitive and important areas, breeding and spawning grounds of marine life etc., are categorized in coastal Regulation Zone as:

A. CRZ – IV

B. CRZ – II

C. CRZ – III

D. CRZ – I

31. A management tool comprising a systematic, periodic and objective evaluation of how well an environmental organization, management and equipment are performing is known as:

A. Raw material balance

B. Input – output analysis

C. Acturities at site

D. Environmental audit

33. Match the items in List – I with List – II and select the correct answer using codes given below:

List – I List – II

• (a) Montreal Conven- (i) Ozone depletion tion

(b) Rio – Summit (ii) Greenhouse gas

(c) Ramsah Conven- (iii) Convention on tion Biological diversity

(d) Kyoto Protocol (iv) Wetlands convention

34. The least preferred technique in the disposal of municipal solid waste is:

A. incineration

B. composting

C. land filling

D. bricketting

35. Bacterial decomposition of biological material under aerobic condition is:

A. Fermentation

B. Fertilization

C. Contamination

D. Composting

36. When you go for shopping, what are you expected to do to save environment?

A. Shop for products that have as little packaging as possible.

B. In any store, use a bag even it is not needed.

C. Do not reduce the frequency of shopping.

D. Buy paper towels and napkins.

38. In the analysis of 15 water samples, Ca and Mg gave a correlation of +0.95. It means:

A. Ca came from soil and Mg came from biota

B. Ca and Mg both came from the same type of water

C. Ca and Mg are both cogenetic

D. Ca and Mg came from different sources.

39. If a piece of metal weighs 10.2g in air, 8.6g in water and 7.8g in another liquid, then what will be the specific gravity of the liquid?

A. 1.0

B. 1.5

C. 2.0

D. 3.0

40. The geometric mean of the numbers 2, 4, 8, 16, 32 is:

A. 12

B. 16

C. 8

D. 32

41. The correlation coefficient between the variables X, Y as given in the following table:

X 1 3 4 6 8 9 11 14

Y 1 2 4 4 5 7 8 9 is:

A. -0.977

B. -0.517

C. +0.977

D. +0.217

42. Climatic stress is caused by insufficient and/or excessive regime of:

A. Temperature

B. Humidity

C. Solar radiation

D. All the above

43. The chemical that is used to ripen mangoes is:

A .Calcium sulphide

B. Calcium carbide

C. Calcium carbonate

D. Calcium chloride

44. Which two of the following statements regarding ISO 14000 series of standards are true? Answer choosing the code given below:

(i) ISO 14000 standards are based on a principle assumption that better environmental management will lead to better environmental performance.

(ii) ISO M°C/u standards are regulatory standards developed by ISO

(iii) ISO 14000 standards are market driven and therefore are based on voluntary involvement of all interests in the market place.

(iv) The adoption of ISO 14000 is a one time commitment

A (i) and (ii)

B. (ii) and (iii)

C. (i) and (iii)

D. (iii) and (iv)

45. Organisms that generate energy using light are:

A. oligotrophs

B. chaemorganotrophs

C. chaemolithotrophs

D. photoautotrophs

47. Land use pattern is usually studied by the following technique:

A. Aerial photography

B. Satellite imaging

C. Satellite imaging and G. I. S.

D. Satellite imaging, G. I. S. and G. P. S.

48. To conserve coral reefs the Govt, of India declared one of the following as Marine Park:

A. Gulf of Kutch

B. Lakshadweep islands

C. Gulf of Mannar

D. Andaman Islands

49. Which one of the following does not contribute to conservation of water?

A Waste water treatment

B. Waste land development

C. Water shed protection

D. Rain water harvesting

50. Particle size in soil can be classified as clay: 1-4 micron. Silt: 4-62 micron. Sand: 62-1000 micron; Boulder: >1000 micron. It is hence correct to suggest that in nature particle size distribution follows:

A. Binomial distribution

B. Lognormal distribution

C. Linear distribution

D. Normal distribution

Answers