Science & Technology PYQs

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1. Prelims 2008Q36Biology & Human Body

   What is the pH level of blood of a normal person?

   a4·5 – 4·6b6·45 – 6·55c7·35 – 7·45d8·25 – 8·35
2. Prelims 2008Q43Health & Diseases

   Consider the following statements about probiotic food:

   1.Probiotic food contains live bacteria which are considered beneficial to humans.

   2.Probiotic food helps in maintaining gut flora.

   Which of the statements given above is/are correct?

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
3. Prelims 2008Q47Inventions & Scientists

   Which of the following pairs is/are correctly matched?

   Theory/Law — Associated Scientist

   1.Continental Drift : Edwin Hubble

   2.Expansion of Universe : Alfred Wegener

   3.Photoelectric Effect : Albert Einstein

   Select the correct answer using the code given below:

   a2 and 3 onlyb3 onlyc2 onlyd1 only
4. Prelims 2008Q77Inventions & Scientists

   Who among the following discovered heavy water?

   aHeinrich HertzbH. C. UreycG. MendeldJoseph Priestley
5. Prelims 2008Q85Defence & Nuclear Technology

   In the year 2007, an earthquake led to massive radioactive water leakage in the largest nuclear plant in the world. In which country did it occur?

   aGermanybCanadacJapandUSA
6. Prelims 2008Q87Space Technology

   Which one of the following is a spacecraft?

   aApophisbCassinicSpitzerdTechSar
7. Prelims 2008Q88Defence & Nuclear Technology

   In which one of the following locations is the International Thermonuclear Experimental Reactor (ITER) project to be built?

   aNorthern SpainbSouthern FrancecEastern GermanydSouthern Italy
8. Prelims 2008Q89Space Technology

   What is the purpose of the US Space Agency's Themis Mission, which was recently in the news?

   aTo study the possibility of life on MarsbTo study the satellites of SaturncTo study the colourful display of high latitude skiesdTo build a space laboratory to study the stellar explosions
9. Prelims 2008Q103Emerging Technologies

   Where was the first desalination plant in India to produce one lakh litres freshwater per day based on low temperature thermal desalination principle commissioned?

   aKavarattibPort BlaircMangaloredValsad
10. Prelims 2008Q104Inventions & Scientists

    Which of the following pairs are correctly matched?

    Institute — Location

    1.National Centre for Cell Science : Mysore

    2.Centre for DNA Fingerprinting and Diagnostics : Hyderabad

    3.National Brain Research Centre : Gurgaon

    Select the correct answer using the code given below:

    a1, 2 and 3b1 and 2 onlyc2 and 3 onlyd1 and 3 only
11. Prelims 2008Q105Inventions & Scientists

    With which one of the following is BRIT (Government of India) engaged?

    aRailway WagonsbInformation TechnologycIsotope TechnologydRoad Transport
12. Prelims 2008Q107Inventions & Scientists

    Who among the following scientists shared the Nobel Prize in Physics with his son?

    aMax PlanckbAlbert EinsteincWilliam Henry BraggdEnrico Fermi
13. Prelims 2008Q110Physics

    Consider the following statements in respect of a jet engine and a rocket:

    1.A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space.

    2.A rocket carries its own supply of oxygen in the gas form, and fuel.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
14. Prelims 2008Q111Physics

    Which one of the following laser types is used in a laser printer?

    aDye laserbGas lasercSemiconductor laserdExcimer laser
15. Prelims 2008Q112Physics

    Consider the following statements:

    1.A widely used musical scale called diatonic scale has seven frequencies.

    2.The frequency of the note Sa (स) is 256 Hz and that of Ni (नी) is 512 Hz.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
16. Prelims 2008Q113Chemistry

    What are Rubies and Sapphires chemically known as?

    aSilicon dioxidebAluminium oxidecLead tetroxidedBoron nitride
17. Prelims 2008Q114Chemistry

    Which one of the following is also called Stranger Gas?

    aArgonbNeoncXenondNitrous oxide
18. Prelims 2008Q115Chemistry

    Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

    aHydrogen and oxygenbOxygen and acetylenecMethane and airdCarbon dioxide and methane
19. Prelims 2008Q116Chemistry

    Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

    aLithium and mercurybLithium and osmiumcAluminium and osmiumdAluminium and mercury
20. Prelims 2008Q117Physics

    How much is one barrel of oil approximately equal to?

    a131 litresb159 litresc257 litresd321 litres