UPSC CSE/IAS Prelims 2018 General Studies Paper I with answer key and explanation

This page contains UPSC CSE/IAS Prelims 2018 General Studies(GS) Questions Paper I with answer key and explanation. It really helps to take a look at these questions and even better if one try to solve them in timely manner.

These UPSC CSE Prelims 2016 questions for GS Paper 1 are also helpful in understanding the syllabus and pattern of the exam.

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 :

1. 1 only 2. 2 and 3 only
3. 1 and 3 only 4. 1 ,2 and 3



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 ?

1. 1 and 2 only 2. 3 only
3. 1 and 3 only 4. 1 ,2 and 3



53. 

The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economies, emerged at

1. The Earth Summit on Sustainable Development 2002, Johannesburg 2. The United Nations Conference on Sustainable Development 2012, Rio de Janeiro
3. The United Nations Framework Convention on Climate Change 2015, Paris 4. The World Sustainable Development Summit 2016, New Delhi



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 :

1. 1, 3 and 4 only 2. 2, 3 and 5 only
3. 1 and 4 only 4. 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?

1. 1 only 2. 2 and 3
3. 3 only 4. 1 and 3



56. 

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

1. Its extract is widely used in cosmetics. 2. It tends to reduce the biodiversity in the area in which it grows.
3. Its extract is used in the synthesis of pesticides. 4. None of the above



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 ?

1. 1 and 2 only 2. 3 only
3. 1and 3 only 4. 1, 2 and 3



58. 

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

1. The Intergovernmentai Panel on Climate Change 2. The UNEP Secretariat
3. The UNFCCC Secretariat 4. The World Meteorological Organisation



59. 

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

Institution Founder

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

Which of the pairs given above is/are correct ?

1. 1 and 2 2. 2 only
3. 1 and 3 4. 3 only



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 ?

1. 1, 2 and 3 2. 3 and 4 only
3. 1 and 3 only 4. 2 and 4 only