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Solutions for Questions 71-80 UPSC Prelims Paper-I 2018
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Abhishek Srivastava
GS faculty and subject matter expert, has appeared in the UPSC CSE Mains twice, qualified SSC CGL, IBPS PO, RBI Grade B Mains, NABARD Grade

Unacademy user
its really helpful awesome bro
answer of q72 is wrong sir.. Einstein said abt static universe not expanding universe it was given by EDWIN HUBBLE...
The answer of QUESTION 72 would be 1 and 3
For the GM mustard question, you said the first two statements are correct and in that case, answer should be Option A. But the slide shows the answer as Option B, so that's a little confusing. Thanks for your effort to provide a quick solution to the entire GS-1 paper! Appreciate it.
  1. UPSC CIVIL SERVICES EXAM 2018 Prelims Answer key Paper l 03.06.2018

  2. ABHISHEK SRIVASTAVA . UPSC CSE Category leader at Unacademy . Top educator with more than 3.8 mn views Appeared in UPSC CSE Mains twice . Qualified SSC CGL, IBPS PO, IIT JEE . GS Faculty- Geog,History, AnC Polity and Economics . Crash courses Modern, Ancient & Medieval History,Polity Geography important topics . . uncadem Plus Courses: Comprehensive module of Ancient, Medieval and Modern History .

  3. Prelims Answer key Paper SET B

  4. Q.71 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 2. IRNSS covers entire India and about 5500 sq. km beyond its borders. orbits. India will have its own satellite navigation system with full global coverage by the middle of 2019. 3. Which of the statements given above is/are correct? (a) 1 only (b) 1 and 2 only (c) 2 and 3 only (d) None

  5. Solution A Only the 1st statement is correct. IRNSS System consists of constellation of seven satellites of which three are geostationary and four are non-geostationary. It is designed to provide accurate position information service to users in India as well as the region extending up to 1500 km from its boundary, which is its primary service area. Hence, A is the correct answer.

  6. Q.72 Consider the following phenomena: 1. 2. 3. Light is affected by gravity. The Universe is constantly expanding. 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? (a) (b) (c) (d) 1 and 2 only 3 only 1 and 3 only 1, 2 and 3

  7. Solution D All statements are correct with respect to the prediction/predictions of Albert Einstein's General Theory of Relativity often discussed in media. The warp of space-time is often called the cause of gravity. Light is said to be affected by gravity. The most known aspect of theory is that the Universe is constantly expanding. Hence, D is the correct answer.

  8. Q.73 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 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? (a) (b) (c) (d) 1 and 3 only 2 only 2 and 3 only 1, 2 and 3

  9. Solution B The 3rd statement given in the statement is incorrect. The GM Mustard has been developed by the Centre for Genetic Manipulation of Crop Plants at Delhi University.On applying the elimination method, we get the B as the correct answer

  10. Q.74 Consider the following pairs Terms sometimes seen in news Context/Topic 1. 2. 3. Belle ll experiment Blockchain technology CRISPR - Cas9 Artificial Intelligence Digital/Cryptocurrency Particle Physics Which of the pairs given above is/are currently matched? (a) (b) (c) (d) 1 and 3 only 2 only 2 and 3 only 1, 2 and 3

  11. Solution B 1. The Belle lI experiment is a particle physics experiment designed to study the 2. Cas9 (CRISPR associated protein 9) is an RNA-guided DNA endonuclease enzyme properties of B mesons (heavy particles containing a bottom quark). associated with the CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) adaptive immunity system in Streptococcus pyogenes, among other bacteria.

  12. Q.75 Which of the following statements best describes "carbon fertilization"3 (a) Increased plant growth due to increased concentration of carbon dioxide in the (b) Increased temperature of Earth due to increased concentration of carbon dioxide in the (c) Increased acidity of oceans as a result of increased concentration of carbon dioxide in (d) Adaptation of all living beings on Earth to the climate change brought about by the atmosphere atmosphere the atmosphere increased concentration of carbon dioxide in the atmosphere

  13. Q.76 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 recognizes the shortage of stock in it and places an order of the supply of fresh grocery items. When you step out of your house and lock the door, all lights and fans, geysers and AC machines get switched off automatically. On your way to your 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 terms best applies to the above scenario? a) b) c) d) Border Gateway Protocol Internet of Things Internet Protocol Virtual Private Network

  14. Solution D

  15. Solution D Cotton,silk,saltpetre and opium

  16. Q.79. Which of the following is a very significant aspect of the Champaran Satyagraha? a) b) c) d) Active all-India participation of lawyers, students and women in the National Movement Active involvement of Dalit and Tribal communities of India in the National Movement Joining of peasant unrest to India's National Movement Drastic decrease in the cultivation of plantation crops and commercial crops

  17. Solution C Champaran Satyagraha of 1917, that opened a new phase in the national movement by joining it to the great struggle of the Indian peasantry for bread and land. Ever since Plassey (1757), British rule meant a constant exploitation of India, the main burden of which hac fallen on its peasants, artisans and the labouring poor. It has been the great intellectual achievement of the early nationalists that they were able to show how the twin processes of the drain of wealth and de-industrialisation had ruined India... -british-rule-indian-freedom-movement-4628343/

  18. Q.80. Who among the following were the founders of the Hind Mazdoor Sabha' established in 1948? a) B. Krishna Pillai, E.M.S. Namboodiripad and KC. George b) Jayaprakash Narayan, Deen Dayal Upadhyay and M.N. Roy c) C.P. Ramaswamy lyer, K. Kamaraj and Veeresalingam Pantulu d) Ashok Mehta, T.S. Ramanujam and G.G. Mehta