1. Which of following statement is true about the Ecotone?

a. It is meeting place of two different eco systems

b. It is meeting place of two same eco systems
c. Density of species is very low here
d. All of the above.

Ans: a

Explanation: Ecotone is a place where two different eco systems meet each other.
Mangrove and terrestrial eco system is an example of Ecotone. This area is very
rich is in species.

2. Consider following statement about the estuary

I) Estuary is place where the river fresh water meets with ocean water
II) This area is highly productive
III) This area is highly unproductive
IV) All of the above
Which of above the statements is/are true?
a. I) only
b. II) only
c. I) and II)
d. III)

Ans: c

Explanation: Estuary is place where the river or stream fresh water meets with
ocean water. And this place provides the conducive conditions for development of
different species.

3. Which of following statement is incorrect about the Biosphere?

a. Biosphere is combination of lithosphere, hydrosphere and Atmosphere
b. Biosphere is missing at extreme of north and south pole
c. Organisms are uniformly present in Biosphere
d. All of the above

Ans: c

Explanation: Biosphere is combination of lithosphere, hydrosphere and

Atmosphere. Biosphere is not found everywhere some areas do not support the
conditions required for Biosphere. Hence Organisms are not uniformly distributed
throughout the world.
4. What is the carbon credit?
a. It is the difference between the carbon emission allowed and actually emitted
carbon
b. It is the loan amount by IMF for reducing pollution
c. It is loan given to poor people for buying Modern Stoves
d. All of the above
Ans: a

Explanation: Carbon credit shows that country or any entity emit the carbon below
the limit prescribed by the government, hence country or entity can sell it in
Exchange where carbon credits are traded.

5. What is the meaning of coral bleaching?

a. Paling of coral color or decline in zooxanthellae due to climate change
b. Impacts of excessive sea trade on fishing industry
c. Both a and b
d. None of the above

Ans: a

Explanation: Coral Bleaching is being caused by the climate change. Increase in

surface temperature of ocean due to climate change is increasing the decline of
zooxanthellae. Zooxanthellae is responsible for photosynthesis.

6. Relative contributions of CO2, CH4, CFCs and N2O towards global

warming are:
a. 50 %, 30 %, 10 % , and 10 % respectively
b. 60%, 20%, 14%, and 6% respectively
c. 40 %, 30%, 20% and 10% respectively
d. None of the above

Ans: b

Explanation: CO2 is largest contributor towards global warming.

7. Which of following can be used for controlling Gaseous Pollutant?

a. Arrestor
b. Incineration
c. Absorption
d. None of above

Ans: c

Explanation: Absorption technique is used for controlling Gaseous pollutant. These

pollutants are brought into contact with liquid such as water. It may either become
solvent or capture it through the chemical reaction.

8. What does the high Biological Oxygen Demand (BOD) indicates?

a. High level of Microbial Pollution
b. Low level of Microbial Pollution
c. Absence of Microbial Pollution
d. Water is fully pure

Ans: a

Explanation: Oxygen is demanded for decomposition related activities under the

water. Increase in waste and pollution enhances the decomposition activities and
thereby reduces the availability of oxygen for other organic activities under the
water body.

9. What percent of area in the plain should be under forest?

a. 21 %
b. 25%
c. 17%
d. 33%

Ans: d

Explanation: National Forest Policy has recommended that for maintaining the
ecological balance there should be 33 % area under the forest in plain areas. But
present forest cover in Indian is around 21-22 %.

10. Biodiversity Hotspot are characterized on the basis of:

a. Endemic flowering plant and threat perception
b. Endemic flowering plant
c. Species of flowering plants
d. None of above
Ans. a

Explanation: These areas are rich of plant species and these are endemic to this
area. Endemism implies the presence of species in particular area only.

11). Eutrophication means

(a) Thermal change in water

(b) Filling up of water body with aquatic due to extra nourishment

(c) Solid waste

(d) None of the above

Answer: b

12. Biochemical oxygen demand means

(a) Industrial pollution

(b) Air pollution

(c) Polluting capacity of effluent

(d) Dissolved O2 needed by microbes to decompose organic waste

Answer: d

13. The main components of photochemical smog is

(a) Water vapour

(b) Sulphur dioxide

(c) Oxides of nitrogen

(d) All of the above

Answer: c

14. Deforestation generally decreases

(a) Rainfall

(b) Soil erosion

(c) Drought

(d) Global warming

Answer: a

15. The term Alpha diversity refers to

(a) Genetic diversity

(b) Community and ecosystem diversity

(c) Species diversity

(d) Diversity among the plant

Answer: b

16. ____________ is defined as an ecological state of a species being unique to

a specific geographic location.

(a) Exotic species

(b) Endemic species

(c) Ecosystem

(d) None of the above

Answer: b

17. 5th June is observed as

(a) World forest day

(b) World environment day

(c) World wildlife day

(d) World population day

Answer: b

18. The Ecological pyramid that is always upright

(a) Pyramid of energy

(b) Pyramid of biomass

(c) Pyramid of number

(d) None of these

Answer- a

19. Who coined the term acid rain?

(a) Christ Ralph

(b) Elmer Joseph Clark

(c) Ernest Flower

(d) Robert Angus Smith

Answer: d

20. The damage caused by acid rain is due to_________ nature of acid rain

(a) balancing

(b) protecting

(c) withstanding

(d) corrosive

Answer: d
21. Acid rain reacts with marble and limestone to form

(a) calcium carbonate

(b) calcium hydroxide

(c) calcium sulphate

(d) None of the above

Answer: C

22. Which of the following facts are incorrect?

(a) Global warming is the rise in the average temperature of the earth’s climate
system

(b) Eutrophication is observed in water bodies

(c) The greenhouse effect is a natural phenomenon

(d) Ozone is harmless to breathe

Answer: d

23. Which of the following is called the secondary air pollutant?

(a) PANs

(b) Ozone

(c) Carbon monoxide

(d) Nitrogen Dioxide

Answer: b
24. Which of the following statements is true about smog?

(a) Smog is derived from the fog

(b) Smog is derived from smoke

(c) Smog is derived from water vapor

(d) Smog is derived from both fog and smoke

Answer: d

25. Which of the following diseases are caused by smog?

(a) Rickets

(b) Bronchitis

(c) Breathing Problems

(d) All of the above

Answer: d

26. The protocol which decided to completely phase out CFC is

(a) Cartagena protocol

(b) Stockholm Convention

(c) Montreal protocol

(d) Kyoto protocol

Answer: c

27. Which of the following is said to be a biodegradable waste?

(a) Plastics

(b) Glasses
(c) Eggshell

(d) Polythene

Answer: c

28. The uses of CFCs are

(a) Insulators

(b) Aerosol propellants

(c) Refrigerants

(d) All of the above

Answer: d

29. The ozone layer is present in -

(a) Mesosphere

(b) Thermosphere

(c) Stratosphere

(d) None of the above

Answer: c

30. Which of the following are the negative health effects of noise pollution?

(a) Hypertension

(b) Hearing loss

(c) Stress and headache

(d) All of the above

Answer: d
31. Wildlife week is celebrated from

(a) 2nd October to 8th October

(b) 15th October to 21st October

(c) 14th June to 20th June

(d) None of the above

Answer: a

32. CNG stands for

(a) Common Natural gas

(b) Compressed National gas

(c) Compressed Natural gas

(d) Certified National gas a

Answer-c