In UPSC Prelims 2020 Paper, Science & Technology covered

The questions are overlapping with agriculture, environment, and even Governance.

From Synopsis IAS Prelims Online course for 2020, most of the questions could be attempted directly.

Direct Hit from Content:

Direct Hit from Guidance Series:

 

SERIES – B

 

Q.1) With reference to the carbon nanotubes, consider the following statement :

  1. They can be used as the carriers of drugs and antigens in the human body.
  2. They can be made into the artificial blood capillaries for an injured part of human body.
  3.  They can be used in biochemical sensors.
  4. Carbon nanotubes are biodegradable.

Which of the statements given above are correct ?

(a) 1 and 2 only

(b) 2,3 and 4 only

(c) 1,3 and 4 only

(d) 1,2,3 and 4

 

Difficulty level: easy

Direct Hit from 20-20 and 50-50 Series.

Approach:

  • I always tell in how to approach Science and Technology questions, whenever in doubt, tick all of the above option, until the option is not very much hypothetical. Read this article of UPSC 2019 prelims paper analysis.
  • Part of Classroom and 20-20 and 50-50 Series. Watch the following video to learn how to solve science and Technology Questions in Exam Mode.

 

 


Q.2) Consider the following activities : 

  1. Spraying pesticides on a crop field
  2. Inspecting the craters of active volcanoes
  3. Collecting breath samples from spouting whales for DNA analysis At the present level of technology, which of the above activities can be successfully carried out by using drones ?

(a) 1 and 2 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3 

 

 

Difficulty level: easy

Direct Hit from 20-20 and 50-50 Series.

Approach:

  • I always tell in how to approach Science and Technology questions, whenever in doubt, tick all of the above option, until the option is not very much hypothetical. Read this article of UPSC 2019 prelims paper analysis.
  • Part of Classroom and 20-20 and 50-50 Series. Watch the video linked to question no 1 to learn how to solve science and Technology Questions in Exam Mode.

 

 


Q.3) The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft.” 

The experiment in question refers to

(a) Voyager-2

(b) New Horizons

(c) LISA Pathfinder

(d) Evolved LISA 

 

Difficulty level: Vague.

I’ve have taught about all these mission in space technology lecture, under space probes. But neither will I teach such fungus things for 2021, not you need to study such things.

These are traps from UPSC. 

 

 


Q.4) Consider the following statements : 

  1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent.
  2. A person’s genome can be edited before birth at the early embryonic stage.
  3. Human induced pluripotent stem cells can be injected into the embryo of a pig.

   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

 


Q.5) What is the importance of using Pneumococcal Conjugate Vaccines in India? 

  1. These vaccines are effective against pneumonia as well as meningitis and sepsis.
  2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced.
  3. These vaccines have no side effects and cause no allergic reactions.

Select the correct answer using the code given below : 

(a) 1 only

(b) 1 and 2 only 

(c) 3 only

(d) 1, 2 and 3

 


Q.6) In India, the term “Public Key Infrastructure” is used in the context of

(a) Digital security infrastructure 

(b) Food security infrastructure

(c) Health care and education infrastructure

(d) Telecommunication and transportation infrastructure

 


Q.7) Which of the following statements are correct regarding the general difference between plant and animal cells? 

  1. Plant cells have cellulose cell walls whilst animal cells do not.
  2. Plant cells do not have plasma membrane unlike animal cells which do.
  3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles.

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

 


Q.8) Which of the following are the reasons/factors for exposure to benzene pollution ? 

  1. Automobile exhaust
  2. Tobacco smoke
  3. Wood burning
  4. Using varnished wooden furniture
  5. Using products made of polyurethane

Select the correct answer using the code given below : 

(a) 1, 2 and 3 only

(b) 2 and 4 only

(c) 1, 3 and 4 only

(d) 1, 2, 3, 4 and 5 

 

 

 


Q.11) With reference to the cultural history of India, which one of the following is the correct description of the term ‘paramitas’?

(a) The earliest Dharmashastra texts written in aphoristic (sutra) style.

(b) Philosophical schools that did not accept the authority of Vedas.

(c) Perfections whose attainment led to the Bodhisattva path

(d) Powerful merchant guilds of early medieval south India.

 

Difficulty Level: Very Tough

What else do you want from 20-20 and 50-50 Series. UPSC asked ditto same statement. Zia sir is great.  

 


Q.17) In the context of recent advances in human reproductive technology, ‘Pronuclear Transfer” is used for

(a) Fertilization of egg in vitro by the donor sperm

(b) Genetic modification of sperm producing cells

(c) Development of stem cells into functional embryos

(d) Prevention of mitochondrial diseases in offspring

 


Q.18) With the present state of development, Artificial Intelligence can effectively do which of the following?

  1. Bring down electricity consumption in industrial units
  2. Create meaningful short stories and songs
  3. Disease diagnosis
  4. Text-to-speech conversion
  5. Wireless transmission of electrical energy

Select the correct answer using the code given below:

(a) 1,2,3 and 5 only

(d) 1,3, and 4 only

(c) 2,4,and 5 only

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

 


Q.19) With reference to visible light communication (VLC) technology, which of the following statements are correct?

  1. VLC uses electromagnetic spectrum wavelengths 375 to 780nm
  2. VLC is known as long-range optical wireless communication
  3. VLC can transmit large amounts of data faster than Bluetooth
  4. VLC has no electromagnetic interference

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

 


Q.20) With reference to “Blockchain Technology” consider the following statements:

  1. It is a public ledger that everyone can inspect, but which no single user controls.
  2. The structure and design of blockchain is such that all the data in it are about cryptocurrency only
  3. Applications that depend on basic features of blockchain can be developed without anybody’s permission.

Which of the statements given above is/are correct?

(a) 1 only

(b) 1 and 2 only

(c) 2 only

(d) 1 and  3 only

 


Q.31) Consider the following statements:

  1. Aadhaar metadata cannot be stored for more than three months
  2. State cannot enter into any contract with private corporations for sharing of Aadhar data
  3. Aadhaar is mandatory for obtaining insurance products.
  4. Aadhar is mandatory for getting benefits funded out of the Consolidate fund of India.

Which of the statements give above is/are correct?

(a) 1 and 4 only

(b) 2 and 4 only

(c) 3 only

(d) 1,2 and 3 only

 


Q.63) What is/are the advantage/advantages of zero tillage in agriculture?

  1. Sowing of what 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

 

 


Q.68) With reference to solar water pumps, consider the following statements:

  1. Solar power can be used for running surface pumps and not for submersible pumps,
  2. Solar power can be used for running centrifugal pumps and not the ones with piston.

Which of the statements given above is/are correct?

(a)    1 only

(b)   2 only

(c)    Both 1 and 2

(d)   Neither 1 nor 2

 

 

 


Q.72) What is the importance of the term “Interest Coverage Ratio” of a firm in India?

  1. It helps in understanding the present risk of a firm that a bank is going to give a loan to.
  2. It helps in evaluating the emerging risk of a firm that a bank is going to give a loan to.
  3. The higher a borrowing firm’s level of Interest Coverage Ratio, the worse is its ability to service its debt.

Select the correct answer using the code given below:

(a)    1 and 2 only

(b)   2 only

(c)    1 and 3 only

(d)   1, 2 and 3

 


Q.85) In India, why are some nuclear reactors kept under “IAEA Safeguards” while others are not ?

(a) Some use uranium and others use thorium

(b) Some use imported uranium and others use domestic supplies

(c) Some are operated by foreign enterprises and others are operated by domestic enterprises

(d) Some are State-owned and others are privately-owned

 

 


Q.90) In India, under cyber insurance for individuals, which of thefollowing benefits are generally covered, in addition to payment for the loss of funds and other benefits ?

  1. Cost of restoration of the computer system in case of malware disrupting access to one’s computer
  2. Cost of a new computer if some miscreant wilfully damages it, if proved so
  3. Cost of hiring a specialized consultant to minimize the loss in case of cyber extortion
  4. Cost of defence in the Court of Law if any third party files a suit

Select the correct answer using the code given below :

(a)    1, 2 and 4 only

(b)   1, 3 and 4 only

(c)    2 and 3 only

(d)   1, 2, 3 and 4

 


Q.96) Steel slag can be the material for which of the following ?

  1. Construction of base road
  2. Improvement of agricultural soil
  3. Production of cement

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

 

Difficulty level: moderate

Direct Hit from 20-20 and 50-50 Series.

Approach:

I always tell in how to approach Science and Technology questions, whenever in doubt, tick all of the above option, until the option is not very much hypothetical. Read this article of UPSC 2019 prelims paper analysis.

Part of Classroom and 20-20 and 50-50 Series. Watch the video linked to question no 1 to learn how to solve science and Technology Questions in Exam Mode.

 


Q.98) In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint ?

  1. Copper slag
  2. Cold mix asphalt technology
  3. Geotextiles
  4. Hot mix asphalt technology
  5. Portland cement

Select the correct answer using the code given below :

(a) 1, 2 and 3 only

(b) 2, 3 and 4 only

(c) 4 and 5 only

(d) 1 and 5 only

 


Q.99) Consider the following statements :

  1. Coal ash contains arsenic, lead and mercury.
  2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
  3. High ash content is observed in Indian coal.

Which of the statements given above is/are correct ?

(a)    1 only

(b)   2 and 3 only

(c)    3 only

(d)   1, 2 and 3

 

Difficulty level: easy

Direct Hit from 20-20 and 50-50 Series.

Approach:

  • I always tell in how to approach Science and Technology questions, whenever in doubt, tick all of the above option, until the option is not very much hypothetical. Read this article of UPSC 2019 prelims paper analysis.
  • Part of Classroom and 20-20 and 50-50 Series. Watch the video linked to question no 1 to learn how to solve science and Technology Questions in Exam Mode.

Option 1 and 2 are true.

Although you might be in doubt for statement 3, there is no option of 1 and 2 only. So go for all of the above. Statement 3 is part of every coaching’s current affairs.

 


Q.100) What is the use of biochar in farming?

  1. Biochar can be used as a part of the growing medium in vertical farming.
  2. When biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms.
  3. When biochar is a part of the growing medium, it enables the growing medium to retain water for longer time.

Which of the statements given above is/are correct?

(a)    1 and 2 only

(b)   2 only

(c)    1 and 3 only

(d)   1, 2 and 3

 

Difficulty level: moderate

Direct Hit from 20-20 and 50-50 Series.

Approach:

I always tell in how to approach Science and Technology questions, whenever in doubt, tick all of the above option, until the option is not very much hypothetical. Read this article of UPSC 2019 prelims paper analysis.

Part of Classroom and 20-20 and 50-50 Series. Watch the video linked to question no 1 to learn how to solve science and Technology Questions in Exam Mode.