UPSC GS PRELIMS 2012 ENVIRONMENT QUESTIONS

1 . Consider the following kinds of organisms :

1 . Bacteria
2 . Fungi
3 . Flowering plants
Some species of which of the above kinds of organisms are employed as biopesticides?

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Solution (d)

2 . Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct?

1 . Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
2 . The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.
3 . The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.
Select the correct answer using codes given below :

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Solution (a)

3 . Consider the following areas:

1 . Bandipur
2 . Bhitarkanika
3 . Manas
4 . Sunderbans
Which of the above are Tiger Reserves?

(a) 1 and 2 only

(b) 1, 3 and 4 only

(c) 2, 3 and 4 only

(d) l, 2, 3 and 4

Solution (b)

4 . In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

(a) Biosphere Reserves

(b) National Parks

(c) Wetlands declared under Ramsar Convention

(d) Wildlife Sanctuaries

Solution (b)

5 . Consider the following kinds of organisms :

1 . Bat
2 . Bee
3 . Bird
Which of the above is/are pollinating agent/agents?

(a) 1 and 2 only

(b) 2 only

(c) 1 and 3 only

(d) 1, 2 and 3

Solution (d)

6 . Which one of the following groups of animals belongs to the category of endangered species?

(a) Great Indian Bustard, Musk Deer, Red Panda and Asiatic Wild Ass

(b) Kashmir Stag, Cheetal, Blue Bull and Great Indian Bustard

(c) Snow Leopard, Swamp Deer, Rhesus Monkey and Saras (Crane)

(d) Lion-tailed Macaque, Blue Bull, Hanuman Langur and Cheetal

Solution (a)

7 . Which of the following can be threats to the biodiversity of a geographical area?

1 . Global warming
2 . Fragmentation of habitat
3 . Invasion of alien species
4 . Promotion of vegetarianism
Select the correct answer using codes given below :

(a) 1, 2 and 3 only

(b) 2 and 3 only

(c) 1 and 4 only

(d) 1, 2, 3 and 4

Solution (a)

8 . Consider the following :

1 . Black-necked crane
2 . Cheetah
3 . Flying squirrel
4 . Snow leopard
Which of the above are naturally found in India?

(a) 1, 2 and 3 only

(b) 1, 3 and 4 only

(c) 2 and 4 only

(d) 1, 2, 3 and 4

Solution (b)

9 . A particular State in India has the following characteristics :

1 . It is located on the same latitude which passes through northern Rajasthan.
2 . It has over 80% of its area under forest cover.
3 . Over 12% of forest cover constitutes Protected Area Network in this State.
Which one among the following States has all the above characteristics?

(a) Arunachal Pradesh

(b) Assam

(c) Himachal Pradesh

(d) Uttarakhand

Solution (a)

10 . With reference to the wetlands of India, consider the following statements :

1 . The country’s total geographical area under the category of wetlands is recorded more in Gujarat as compared to other States.
2 . In India, the total geographical area of coastal wetlands larger than that of wetlands.
Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

Solution (a)

11 . The acidification of oceans is increasing. Why is this phenomenon a cause of concern?

1 . The growth and survival of calcareous phytoplankton will be adversely affected.
2 . The growth and survival of coral reefs will be adversely affected.
3 . The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4 . The cloud seeding and formation of clouds will be adversely affected.
Which of the statements given above is /are correct?

(a) 1, 2 and 3 only

(b) 2 only

(c) 1 and 3 only

(d) 1, 2, 3 and 4

Solution (a)

12 . The Millennium Ecosystem Assessment describes the following major categories of ecosystem services-provisioning, supporting, regulating, preserving and cultural. Which one of the following is supporting service?

(a) Production of food and water

(b) Control of climate and disease

(c) Nutrient cycling and crop pollination

(d) Maintenance of diversity

Solution (d)

13 . What would happen if phytoplankton of an ocean is completely destroyed for some reason?

1 . The ocean as a carbon sink would be adversely affected.
2 . The food chains in the ocean would be adversely affected.
3 . The density of ocean water would drastically decrease.
Select the correct answer using codes given below :

(a) 1 and 2 only

(b) 2 only

(c) 3 only

(d) 1, 2 and 3

Solution (a)

14 . What is the role of ultraviolet (UV) radiation in the water purification systems?

1 . It inactivates /kills the harmful microorganisms in water.
2 . It removes all the undesirable odours from the water.
3 . It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Which of the statements given above is/are correct?

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Solution (a)

15 . Consider the following statement:- Chlorofluorocarbons, known as ozone-depleting substances, are used –

1 . in the production of plastic foams
2 . in the production of tubeless tyres
3 . in cleaning certain electronic components
4 . as pressurizing agents in aerosol cans
Which of the statements given above is/are correct?

(a) 1, 2 and 3 only

(b) 4 only

(c) 1, 3 and 4 only

(d) 1, 2, 3 and 4

Solution (c)

16 . Government of India encourages the cultivation of ‘sea buckthorn’. What is the importance of this plant?

1 . It helps in controlling soil erosion and in preventing desertification.
2 . It is a rich source of biodiesel.
3 . It has nutritional value and is well-adapted to live in cold areas of high altitudes.
4 . Its timber is of great commercial value.
Which of the statements given above is /are correct?

(a) 1 only

(b) 2, 3 and 4 only

(c) 1 and 3 only

(d) 1, 2, 3 and 4

Solution (c)