This is Environment and Ecology GS Practice part 5 section.  Keep visiting Environment and Ecology section in UPSC category of our website for learning more about the subject.

Que 21 – With reference to the wetland of India consider the following statement : (UPSC CSE 2012)

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 statement given above is/are correct?

(a) 1 only

(b) 2 only

(c) both 1 and 2

(d) neither 1 nor 2

Answer – (a)

Explanation :

Gujarat has greater area under the wetlands then other state. It is called the land of wetlands.
In India has more area under the wetlands than coastal wetlands.

Que. 22 – The acidification of ocean is increasing. Why is the phenomena a cause of concern? (UPSC CSE 2012)

1. The growth and survival of calcareous phytoplankton will be adversely affected.

2. The growth of survival of coral reefs will be adversely affected.

3. The Cloud seeding and formation of clouds will be adversely affected.

Which of the statement given above each are correct?

(a) 1 2 and 3 only

(b) 2 only

(c) 1 and 3 only

(d) 1 2 3 and 4

Answer – (a)

Explanation :
Ocean acidification is the decrease in the pH of the Earth’s oceans and caused by the uptake of carbon dioxide from the atmosphere.
Acidification of the ocean threatens coral reefs by making it harder for corals to build their skeletons. The skeletons become vulnerable two breaking as their shells are made of calcium carbonate and which lessens with acidification.
However, it is not known to have any effect on cloud seeding and formation of clouds.

Que. 23 – 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? (UPSC CSE 2012)

(a) Production of food and water

(b) Control of climate and disease

(c) Nutrient cycling and crop pollination

(d) Maintenance of diversity

Answer – (c)

Explanation :

The Millennium Ecosystem Assessment (MEA) is a major assessment of the human impact on the environment.
It popularized the term Ecosystem services- the benefit gained by humans from ecosystems. This include the following service that maintain the conditions for life on the earth.
Provisioning services such as food and water; Regulating services such as food and disease control;
Cultural services such as spritual, recreational, and cultural benefits; and
Supporting services such as nutrient cycling, soil formation.

Que. 24 – consider the following statement of floral carbon can add ozone depleting substance are used (UPSC CSE 2012)

1. In the production of plastic foams

2. In the production of tubeless tyres

3. In cleaning certain electronic components

4. As pressuring agent in aerosol cans

Which of these statement given about is our correct? (UPSC CSE 2012)

(a) 1, 2 and 3 only

(b) 4 only

(c) 1, 3 and 4 only

(d) 1, 2 ,3 and 4

Answer – (c)

Explanation :

Chlorofluorocarbons are are non-toxic, non-flammable chemical containing, atoms of carbon, chlorine and fluorine.
They are used in manufacturing of aerosol spray, blowing agent for foams and packing material as solvents, and as refrigerants.

Que. 25 – which of the following can be found as pollutants in the drinking water in some part of India? (UPSC CSE 2013)

1. Arsenic
2. Sorbitol
3. Fluoride
4. Formaldehyde
5. Uranium

Select the correct answer using the code given below.

(a) 1 and 3 only

(b) 2, 4 and 5 only

(c) 1, 3 and 5 only

(d) 1, 2, 3, 4 and 5

Answer – (c)

Explanation :
Drinking water is contaminated with the presence of excess nitrate followed by fluoride, iron, salinity, arsenic, uranium, lead, chromium, and cadmium.

You can study about Environment and Ecology topic at our Environment and Ecology for Govt Exams article.  Also, you can keep preparing for Environment and Ecology GS Practice Part 5.

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