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  • UPSC Prelims 2020 GS Paper 1 Answer Key

UPSC Prelims 2020 GS Paper 1 Answer Key

  • Posted by IASgram Team
  • Date October 4, 2020
  • Comments 0 comment

Questions from different sections/subjects Prelims 2020

Sl.NoSubjectNumber of Questions
1Ancient History4
2Art and Culture4
3Indian National Movement8
4Indian Polity13
5Indian Economy10
6Geography14
7Environment8
8General Science6
9Miscellaneous8
10Current Affairs25
 Total100

Question 1:  What are the advantages of fertigation in agriculture ?

1. Controlling the alkalinity of irrigation water is possible.

2 Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible.

3. Increased availability of nutrients to plants is possible. 4. Reduction in the leaching of chemical
nutrients is possible.

Select the correct answer using the code given below:

(a) 1, 2 and 3 only

(b) 1, 2 and 4 only

(c) 1,3 and 4 only

(d) 2, 3 and 4 only

Answer: (c)

Question 2. Consider the following minerals:

1. Bentonite

2. Chromite

3. Kyanite

4. Sillimanite

In India, which of the above is/are officially designated as major minerals?

(a) 1 and 2 only

(b) 4 only

(c) 1 and 3 only

(d) 2, 3 and 4 only

Answer: 

(b)

Question 3. With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct? 

1. OMT is measured up to a depth of 26°C isotherm which is 129 meters in the south-western Indian Ocean during January – March

2. OMT collected during January – March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean. Select the correct answer using the code given below:

(a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

Answer:

(d)

Question 4. With reference to chemical fertilizers in India, consider the following statements : 

1. At present, the retail price of chemical fertilizers is market-driven and not administered by the Government. 

2. Ammonia, which is an input of urea, is produced from natural gas. 3. Sulphur, which is a raw material for phosphoric acid fertilizer, is a by-product of oil refineries. Which of the statements given above is/are correct?

(a) 1 only 

(b) 2 and 3 only 

(c) 2 only 

(d) 1, 2 and 3

Answer: 

(b)

Question 5: With reference to India’s Desert National Park, which of the following statements are correct?

1. It is spread over two districts.

2. There is no human habitation inside the

Park

3. It is one of the natural habitats of Great Indian Bustard.

Select the correct answer using the code given

below:

(a) 1 and 2 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Answer: c

Question: 6. Siachen Glacier is situated to the

(a) East of Aksai Chin

(b) East of Leh

(c) North of Gilgit

(d) North of Nubra Valley

Answer: d

Question 7: With reference to the history of India, consider the following pairs :

Famous Place Present State 

1. Bhilsa – Madhya Pradesh 

2. Dwarasamudra – Maharashtra

3. Girinagar – Gujarat 

4. Sthanesvara – Uttar Pradesh 

Which of the pairs given above are correctly matched ? 

(a) 1 and 3 only 

(b) 1 and 4 only 

(c) 2 and 3 only 

(d) 2 and 4 only

Answer: a

Question 8: Consider the following statements :

1. 36% of India 36% of India’s districts are classified as “overexploited” or “critical” by the Central Ground Water Authority (CGWA).

2. CGWA was formed under the Environment (Protection) Act.

3. India has the largest area under groundwater irrigation in the world.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 and 3 only

(c) 2 only

(d) 1 and 3 only

Answer:  b

Question 9: Consider the following statements :

1. Jetstreams occur in the Northern Hemisphere only.

2. Only some cyclones develop an eye.

3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 and 3 only

(c) 2 only

(d) 1 and 3 only

Answer: c

Question 10: Among the following Tiger Reserves, which

one has the largest area under “Critical Tiger Habitat” ?

(a) Corbett

(b) Ranthambore

(c) Nagarjunsagar-Srisailam

(d) Sunderbans

Answer: c

Question 11: If a particular plant species is placed under Schedule VI of The Wildlife Protection Act, 1972, what is the implication ? 

(a) A licence is required to cultivate that plant. 

(b) Such a plant cannot be cultivated under any circumstances. 

(c) It is a Genetically Modified crop plant. 

(d) Such a plant is invasive and harmful to the ecosystem

Answer: b

Question 12: With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Chaul were well known as 

(a) ports handling foreign trade 

(b) capitals of powerful kingdoms  

(c) places of exquisite stone art and architecture 

(d) important Buddhist pilgrimage centres

Answer: a

Question 13: What is/are the advantage/advantages of zero tillage in agriculture ? 1. Sowing of wheat is possible without burning the residue of previous crop. 

2. Without the need for nursery of rice saplings, direct planting of paddy seeds in the wet soil is possible. 

3. Carbon sequestration in the soil is possible. Select the correct answer using the code given below: 

(a) 1 and 2 only 

(b) 2 and 3 only 

(c) 3 only 

(d) 1, 2 and 3

Answer: d

Question 14: According to India’s National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ?

1. Cassava

2. Damaged wheat grains

3. Groundnut seeds

4. Horse gram

5.Rotten potatoes 

6. Sugar beet

Select the correct answer using the code given below:

(a) 1, 2, 5 and 6 only

(b) 1, 3, 4 and 6 only

(c) 2, 3, 4 and 5 only

(d) 1, 2, 3, 4, 5 and 6

Answer:  a

SERIES: B ANSWER KEY

Q1/carbonnanotubeDQ26/PreambleCQ51/FertigationCQ76/Kisan CreditB
Q2/Using dronesDQ27/Gold TrancheDQ52/Major MineralsAQ77/Consumer Price IndexA
Q3/Trio of spacecraftDQ28/Part IVDQ53/Ocean Mean TempBQ78/River flows intoC
Q4/Genetic ChangesDQ29/RP Act, 1951AQ54/Chemical FertilizersBQ79/MSPD
Q5/PneumoccococcalBQ30/President of IndiaAQ55/Desert NPCQ80/Commercial PaperC
Q6/Public Key InfraAQ31/AadhaarBQ56/SiachenDQ81/FDIB
Q7/PlantvsAnimal CellCQ32/Rajya SabhaBQ57/Famous PlaceAQ82/Trade of IndiaD
Q8/Benzen PollutionDQ33/MPLADSAQ58/Ground WaterBQ83/West TexasA
Q9/Global Financial CrisisAQ34/UntouchabilityDQ59/Jet StreamCQ84/Non-finacail debtD
Q10/Withdraw 1 lakhCQ35/Separation of JudiciaryBQ60/Tiger HabitatCQ85/IAEA safeguardsB
Q11/ParamitasCQ36/Macro Economic FrameworkDQ61/Wildlife Protection ActBQ86/TRIMSB
Q12/Rakhmabia caseBQ37/Constitutional GovtDQ62/GhantasalaAQ87/Expansionist PolicyB
Q13/IndigoBQ38/Universal Dec of HRDQ63/Zero TillageDQ88/LPG 1991B
Q14/Fort William CollgeDQ39/Legal Service AuthoritesAQ64/Biofuel PolicyAQ89/DCCBsB
Q15/UlgulanDQ40/Alma-ataCQ65/Social Cost of CarbonAQ90/Cyber InsuranceB
Q16/PaniniCQ41/AurangBQ66/Black gramAQ91/ParivrajakaB
Q17/Pronuclear TransferDQ42/SthaviravadinsBQ67/Subtropical cropAQ92/Indian ElephantA
Q18/Artificial IntelligenceDQ43/Industrial RevolutionAQ68/Solar WaterDQ93/Cauvery BasinC
Q19/VLCCQ44/PratiharasCQ69/Sugar caneCQ94/Ceylon FrogmouthA
Q20/BlockchainAQ45/HundiCQ70/Eco friendly agriDQ95/Indian Swamp DeerA
Q21/Parliamentary SystemBQ46/Desher KathaDQ71/Public InvestmentDQ96/Steel SlagD
Q22/Welfare stateAQ47/Gandhi-IrwinBQ72/Interest Coverage RatioAQ97/Musk DeerA
Q23/Basic structureBQ48/Vital-vidhvansakAQ73/Price of RiceDQ98/Rural RoadA
Q24/Gandhism/MarxismBQ49/KulyavapaAQ74/Indo-Sri LankaAQ99/Coal AshB
Q25/BureaucracyDQ50/Whosover praises – inscriptionAQ75/G20AQ100/BiocharD
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October 4, 2020

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