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Environmental Science most important MCQs For Kashmir University Entrance Test/JKSSB


1.The term ecosystem was coined by

(a) Arthur Tansley
(b) Al Gore

(c) Arrhenius Svante
(d) Mobius

2. Who first used and defined Ecology in 1866?
(a) H. Reiter
(b) Haeckel
(c) Charles Elton

(d) Odum

3) in the study of man environment interaction, the statement of Miss Semple that 'the humans are slowly the product of their environment is

(a) An opinion
(b) A prejudice
(c) A fact

d)  A widely accepted phenomenon

4. A habitat is
(a) An area inhabited by a community

(b) A small part of ecosystem.
c) A particular area inhabited by plants and animals.

d) The number of different organisms living in a
specific area.

5. Biome is a natural community of
(a) Plants in a geographical area.
(b) Animals in a geographical area.
(c) Plants and animals in a geographical area.
(d) Plants in the Arctic region.

6. If we combine all the ecosystems present on earth, then
it is called
(a) Biome (b) Biosphere
(c) Habitat
(d) Ecology

7. All the energy in a food chain originates from
(a) Plants
(b) Sea
c) Sun
(d) All of these

8. A food web is to show
(a) How feeding relationships are interlinked.
(b) How several food chains are connected together.
(c) Who eats what.
(d) All the above.

9. In the analysis of man-environment relationship pragmatic possibilism implies that
(a) There is no limit for man to exploit the resources of earth
(b) There are limited possibilities to explore the Earth's resources
c) The man has to watch and assess the situation and then go ahead with resource utilization
(d) The man has to keep in mind only his basic needs while planning to harness the potential of resourceful earth.


10. Which of the following are included in the biosphere?

(a) Hydrosphere
(c) Atmosphere
(b) Lithosphere
(d) All of these

11. Interlocking of two or more types of food chains at different trophic levels is called
(a) Food chain
(c) Succession
(b) Food web
(d) Ecological pyramid

12. The transfer of food energy through a chain of organisms from one trophic level to another is called

(a) Energy chain
(b) Food chain
(c) Trophic chain
(d) Organism chain

13. A keystone species is characterized by its

(a) Disproportionate large impact on ecosystem
(b) Very less impact on ecosystem
(C) No impact at all
(d) None of the above

14. A population that is at equilibrium is
(a) Steadily decreasing
(b) Steadily increasing
(c) Its number is almost stable over a period of time.
(d) Intermixing rapidly with other populations.

15. Which of the following are considered as producers in a food chain?
(a) Autotrophic plants 

(b) Herbivores
(c) Carnivores
(d) Decomposers

16. Which of the following are directly dependent on producers for living?
(a) Carnivores
(b) Decomposers
(c) Scavengers
(d) Herbivores

17. The animals which feed only on other animals are known as
(a) Omnivores
(b) Carnivores
(C) Herbivores
(d) Autotrophs

18. The green plants, which can make their own food with the help of process of photosynthesis are termed as
(a) Herbivores
(b) Carnivores
(c) Autotrophs
(d) None of the above

19. The various levels through which energy passes into an ecosystem are called
(a) Consumers
(b) Autotrophs
(c) Trophic levels

(d) None of the above

20. The transitional area between two ecosystems is termed as
(a) Ecoline
(b) Ecotourism
(C) Ecotone
(d) None of the above

21. Population consists of
(a) Organisms in a species that are capable of reproducing among themselves.
(b) Different species that can interbreed.
(c) Collective members of a species living and interacting across the biosphere.
(d) Some organisms that may not belong to any species.

22. Which of the following is not an abiotic condition
(a) Water
(c) Temperature
(b) Soil
(d) Bacteria

23. The existence of atmosphere on the earth is due to
a) The revolution of the earth around the sun.
(b) The rotation of the earth.
C) The gravitational force of the earth.
(d) None of the above



24. Match the following:
List-I                                        List-II

A Troposphere                      I. Dust particles

B. Stratosphere                    II. Ozone layer
C. lonosphere                       III. Meteors

D. Exosphere                        IV. Aurora

(a) A-I, B-1, C-III, D-IV (b) A-II, B-I, C-III, D-IV
(C) A-IV, B-11, C-II, D-I (d) None of the above

25. Which of the following is the basis for all food chains?
(a) Consumers
(c) Decomposers
(b) Producers
(d) None of the above

26. Total organic matter in an ecosystem is called
(a) Biome
(c) Plants
(b) Biotic community
(d) Biomass

27. Energy pyramid is
(a) Always inverted        (b) Always horizontal
(C) Sometimes diagonal (d) None of the above

28. As a result of biomagnification, the secondary consumers will be
(a) The most toxic
(c) Not toxic at all

(b) The least toxic
(d) None of the above

29. Which of the following gases is not harmful as a natural
component of the atmosphere?
(a) Carbon dioxide
(c) Nitrogen
(b) Hydrogen
(d) Water vapours

30. The two main components of an ecosystem are
(a) Plants and animals
(b) Biotic and abiotic
(C) Earth and its surroundings
(d) Macro and microorganisms

31. Cloudy nights are warmer compared to clear nights (without clouds) during winters. This is because
(a) Clouds radiate heat towards the earth.
(b) Clouds prevent cold waves from the sky descending on the earth.
(c) Clouds prevent escaping of heat radiation from the earth.
(d) Clouds being at great heights from earth absorb heat from the sun and send them towards the earth.

32. The urbanization process accounts for the urban centres during nights to remain
(a) Faster than that in rural areas.
(b) Slower than that in rural areas.

c ) the same as that in the rural area

d) cooler than that in the rural areas.

36. A temperature inversion is a condition when the air
(a) Near the ground is lighter.
(b) Near the ground is cooler than air at the higher altitudes.
(c) Near the ground is hotter than that at higher altitudes.
(d) None of the above

37. Beginning from the surface of earth, what is the  sequence
of different layers of atmosphere?
(a) Stratosphere, Troposphere, Ionosphere, Exosphere
(b) Troposphere, Stratosphere, Ionosphere, Exosphere
(C) Troposphere, Stratosphere, Ionosphere
(d) None of the above

38. The most dynamic layer of the atmosphere in terms of climatic and weather conditions is
(a) Troposphere (b) Ionosphere
(c) Stratosphere (d) Mesosphere

39. In which of the following layers of the atmosphere, ozone (03) gas is present?
(a) Stratosphere (b) Mesosphere
(d) None of the above
(c) Troposphere

40. In which of the following atmospheric layers ionosphere occurs?
(a) Mesosphere
(b) Exosphere
(c) Stratosphere

 (d) Troposphere

41. In an ecotone, the species which become abundant are called

(a) Keystone species (b) Endemic species
(c) Edge species (d) Foster species

42. The air pollutants are mainly classified as
(a) Point source and non-point source
(b) Primary and secondary pollutants
(d) None of the above
(c) Natural or anthropogenic pollutants

43. The main difference between primary air pollutants and secondary air pollutants is pollutants do not
(a) Former contains water molecules, while secondary
(b) Primary air pollutants have more direct effect on human health.
(c) Former are released directly into the atmosphere, while the latter are formed by chemical reactions in the atmosphere.
(d) Primary air pollutants are formed through photochemical reactions in the sunlight, while the secondary air pollutants are not.

44. Which of the following can be considered as the best example of primary air pollutants?
(a) Carbon dioxide released from burning of coal.
(b) Sulphur trioxide.
(c) Ozone produced in photochemical smog.
(d) Carbon dioxide released through photosynthesis.

45. Which of the following best illustrates a secondary air pollutant?
(a) CO, released from the burning of coal.
(b) NO, released from the burning of oil.
C) Ozone produced in photochemical smog.
(d) None of the above

46. The common features between NO, SO,, CO and SPM is that all of them
(a) Are classified as primary pollutants.
(b) Are classified as secondary pollutants.
(C) Have equal role in causing acid rain.
(d) Are greenhouse gases.

47. How are nitrogen oxides, sulphur oxides and carbon oxides related?
(a) All of them are secondary air pollutants that contribute to global warming.
(b) All of them are primary air pollutants that contribute to acid deposition.
(0) All are air pollutants formed by combustion of fossil fuels.
(d) All of them are air pollutants that result in respiratory diseases in humans.

48.Atmospheric pollutants are mainly present in

(a) Ionosphere
(b) Stratosphere
(c) Mesosphere
(d) Troposphere and lower stratosphere

49. Lead is used as an anti-knocking agent (tetra-ethyl lead)
in petrol. It affects our
(a) Central nervous system
(b) Respiratory system
(c) Cardiac system
(d) Skeletal system

50. Match the following:

List-1                          List-II
(Metal)                        (Effects)
A. Chromium                        1. Thalassaemia
B. Arsenic                  II. Itai-Itai
C.Cadmium               III. Dermatitis
D.Iron                         IV. Carcinogen

(a) A-IV, B-III, C-II, D-I (b) A-IV, B-II, C-III, D-I
FC) A-I, B-III, C-II, D-IV (d) A-I, B-II, C-III, D-IV

51. The chemical responsible for blue baby syndrome that is caused by restricted supply of oxygen to the brain is
(a) Nitrates
(b) Sulphates
(c) Fluorides
(d) Oxides

52. Which of the following metal is responsible for Minamata disease?
(a) Mercury
(b) Cadmium
(c) Chromium
(d) Iron

53. Intake of lead may primarily cause damage of the
(a) Brain
(b) Lung
(C) Liver
(d) Kidney

54. Which of the following geographic area is the largest source of Co, emissions from burning of fossil fuel?
(a) China
(b) Russia
(c) North America

(d) European Union

55. Industries generating hazardous waste are classified as
(a) Brown
(b) Green
(C) Yellow
(d) Red

56. Which of the following greenhouse gases are entirely anthropogenic in origin?
(a) Water vapour
(b) Carbon dioxide
(C) CFCs
(d) Methane

57. Peroxyacyl nitrate (PAN) is a by-product of
(a) Photochemical smog

(b) London smog
(c) Sulphurous smog
(d) None of the above

58. The balance in oxygen level is maintained by
(a) Photosynthesis and cellular respiration
(b) Industrial emissions of gases
(c) Release of ozone in upper atmosphere
(d) None of the above

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