UPSC IAS Prelims (CSAT) Exam 2018 Question Paper and Answer Key

UPSC Prelims 2018 Answer Key | IAS prelims 2018 Answer

51. Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds ?

1. Decreased salinity in the river
2. Pollution of groundwater
3. Lowering of the water-table
Select the correct answer using the code given below :
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1 ,2 and 3

Answer.b

52. With reference to agricultural soils, consider the following statements :

1. A high content of organic matter in soil drastically reduces its water holding capacity.
2. Soil does not play any role in the sulphur cycle.
3. Irrigation over a period of time can contribute to the salinization of some agricultural lands. Which of the statements given above is/are correct ? 
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer.b

53. The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economies, emerged at 
(a) The Earth Summit on Sustainable Development 2002, Johannesburg
(b) The United Nations Conference on Sustainable Development 2012, Rio de Janeiro
(c) The United Nations Framework Convention on Climate Change 2015, Paris
(d) The World Sustainable Development Summit 2016, New Delhi

Answer.b

54. "3D printing" has applications in which of the following?
1. Preparation of confectionery items
2. Manufacture of bionic ears
3. Automotive industry
4. Reconstructive surgeries
5. Data processing technologies
Select the correct answer using the code given below :
(a) 1, 3 and 4 only
(b) 2, 3 and 5 only
(c) 1 and 4 only
(d) 1, 2, 3, 4 and 5

55. Consider the following statements:

1. The Barren Island volcano is an active volcano located in the Indian territory.
2. Barren Island lies about 140 km east of Great Nicobar.
3. The last time the Barren Island volcano erupted was in 1991 and it has remained inactive since then.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3
(c) 3 only
(d) 1 and 3

Answer.d

56. Why is a plant called Prosopis juliflora often mentioned in news ? 

(a) Its extract is widely used in cosmetics.
(b) It tends to reduce the biodiversity in the area in which it grows.
(c) Its extract is used in the synthesis of pesticides.
(d) None of the above 

Answer.b

57. Consider the following statements 

1. Most of the world's coral reefs are in tropical waters.
2. More than one-third of the world's coral reefs are located in the territories of
Australia, Indonesia and Philippines.
3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.

Which of the statements given above is/are correct ? 

(a) 1 and 2 only
(b) 3 only
(c)  1and 3 only
(d) 1, 2 and 3

58. "Momentum for Change : Climate Neutral Now" is an initiative launched by

(a) The Intergovernmental Panel on Climate Change
(b) The UNEP Secretariat
(c) The UNFCCC Secretariat
(d) The World Meteorological Organisation

Answer.c

The UNFCCC secretariat launched its Climate Neutral Now initiative in 2015. The following year, the secretariatlaunched a new pillar under its Momentum for Change initiative focused on Climate Neutral Now, as part of larger efforts to showcase successful climate action around the world.

59. With reference to educational institutes during colonial rule in India, consider the following pairs :

            Institution                                             Founder

1. Sanskrit College William at Benaras -                William Jones
2. Calcutta Madarsa    -                                  Warren Hastings
3. Fort William Arthur College     -                      Arthur Wellesley

Which of the pairs given above is/are correct ? 
(a) 1 and 2
(b) 2 only
(c) 1 and 3
(d) 3 only

Answer.b

60. Consider the following pairs :

Regions sometimes mentioned in news      Country
1. Catalonia            -                            Spain
2. Crimea          -                                Hungary
3. Mindanao     -                                Philippines
4. Oromia           -                               Nigeria

Which of the pairs given above are correctly matched ? 
(a) 1, 2 and 3
(b)) 3 and 4 only
(c) 1 and 3 only
(d) 2 and 4 only

Answer.c

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