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.

1.	With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements : 1. IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits. 2. IRNSS covers entire India and about 5500 sq. km beyond its borders. 3. India will have its own satellite navigation system with full global coverage by the middle of 2019.
	1. 1 only 2. 1 and 2 only 3. 2 and 3 only 4. None Answer & Explanation Answer: Option 1 Explanation: View Answer

2.	Consider the following phenomena : 1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding space-time. Which of the above is/are the prediction/predictions of Albert Einstein's General Theory of Relativity, often discussed in media ?
	1. 1 and 2 only 2. 3 only 3. 1 and 3 only 4. 1, 2 and 3 Answer & Explanation Answer: Option 3 Explanation: Einstein succeeded in showing that matter and spacetime mutually interact to mimic Newton’s naïve idea that masses attract each other. View Answer

3.

With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements : 1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests. 2. GM mustard has the genes that allow the plant cross-pollination and hybridization. 3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University. Which of the statements given above is/are correct ?

1. 1 and 3 only 2. 2 only 3. 2 and 3 only 4. 1, 2 and 3 Answer & Explanation Answer: Option 2 Explanation: View Answer

4.	Consider the following pairs : Terms sometimes seen in news Context /Topic 1. Belle II experiment - Artificial Intelligence 2. Blockchain technology - Digital/Cryptocurrency 3. CRISPR — Cas9 - Particle Physics Which of the pairs given above is/are correctly matched ?
	1. 1 and 3 only 2. 2 only 3. 2 and 3 only 4. 1, 2 and 3 Answer & Explanation Answer: Option 2 Explanation: View Answer

5.

Which of the following statements best describes "carbon fertilization"?

1. Increased plant growth due to increased concentration of carbon dioxide in the atmosphere 2. Increased temperature of Earth due to increased concentration of carbon dioxide in the atmosphere 3. Increased acidity of oceans as a result of increased concentration of carbon dioxide in the atmosphere 4. Adaptation of all living beings on Earth to the climate change brought about hr the increased concentration of carbon dioxide in the atmosphere Answer & Explanation Answer: Option 1 Explanation: View Answer

6.

When the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on automatically. The smart mirror in your bathroom shows the day's weather and also indicates the level of water in your overhead tank. After you take some groceries from your refrigerator for making breakfast, it recognises the shortage of stock in it and places an order for the supply of fresh grocery items. When you step out of your house and lock the door, all lights, fans, geysers and AC machines get switched off automatically. On your way to office, your car warns you about traffic congestion ahead and suggests an alternative route, and if you are late for a meeting, it sends a- message to your office accordingly. In the context of emerging communication technologies, which one of the following term" best applies to the above scenario?

1. Border Gateway Protocol 2. Internet of Things 3. Internet Protocol 4. Virtual Private Network Answer & Explanation Answer: Option 2 Explanation: View Answer

7.	With reference to solar power production in India, consider the following statements: 1. India is the third largest in the world in the manufacture of silicon wafers used in photovoltaic units. 2. The solar power tariffs are determined by the Solar Energy Corporation of India. Which of the statements given above is/are correct?
	1. 1 only 2. 2 only 3. Both 1 and 2 4. Neither 1 nor 2 Answer & Explanation Answer: Option 4 Explanation: View Answer

8.	The staple commodities of export by the English East India Company from Bengal in the middle of the 18th century were
	1. Raw cotton, oil-seeds and opium 2. Sugar, salt, zinc and lead 3. Copper, silver, gold, spices and tea 4. Cotton, silk, saltpetre and opium Answer & Explanation Answer: Option 4 Explanation: View Answer

9.	Which one of the following is a very significant aspect of the Champaran Satyagraha?
	1. Active all-India participation of lawyers, students and women in the National Movement 2. Active involvement of Dalit and Tribal communities of India in the National Movement 3. Joining of peasant unrest to India's National Movement 4. Drastic decrease in the cultivation of plantation crops and commercial crops Answer & Explanation Answer: Option 3 Explanation: View Answer

10.	Who among the following were the founders of the "Hind Mazdoor Sabha" established in 1948 ?
	1. B. Krishna Pillai, E.M.S. Namboodiripad and K.C. George 2. Jayaprakash Narayan, Deen Day al Upadhyay and M.N. Roy 3. C.P. Ramaswamy Iyer, K. Kamaraj and Veeresalingam Pantulu 4. Ashok Mehta, T.S. Ramanujam and G.G. Mehta Answer & Explanation Answer: Option 4 Explanation: View Answer