Science & Technology PYQs

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1. Prelims 1998Q117Inventions & Scientists

   Match the names of outstanding Indian scientists given in List I with the area of their specialised work given in List II and select the correct answer using the codes given below the lists:

   List I

   A.Dr. Raja Ramanna

   B.Dr. M. S. Swaminathan

   C.Prof. U. R. Rao

   D.Prof. Meghnad Saha

   List II

   1.Plant Chemistry

   2.Nuclear Physics

   3.Thermodynamics and astrophysics

   4.Space research

   5.Agricultural sciences

   aA-3, B-5, C-2, D-1bA-2, B-1, C-4, D-3cA-2, B-5, C-4, D-3dA-3, B-1, C-4, D-2
2. Prelims 1998Q118Biology & Human Body

   Match List I with List II and select the correct answer using the codes given below the lists:

   List I

   A.Fruit

   B.Seed

   C.Wood

   D.Starch

   List II

   1.Ovule

   2.Leaf

   3.Stem

   4.Ovary

   aA-2, B-1, C-5, D-4bA-4, B-1, C-3, D-2cA-2, B-3, C-1, D-4dA-4, B-3, C-1, D-2
3. Prelims 1998Q119Inventions & Scientists

   Match List I with List II and select the correct answer using the codes given below the lists:

   List I

   A.Theory of Mutation

   B.Theory of Evolution

   C.One-gene-one-enzyme hypothesis

   D.Operon concept

   List II

   1.Beadle and Tatum

   2.Jacob and Monod

   3.Darwin

   4.De Vries

   aA-3, B-4, C-1, D-2bA-4, B-3, C-1, D-2cA-4, B-3, C-2, D-1dA-3, B-4, C-2, D-1
4. Prelims 1998Q121Chemistry

   Which one of the following statements regarding starch and cellulose is NOT correct?

   aBoth of them are of plant originbBoth of them are polymerscBoth of them give colour with iodinedBoth of them are made up of glucose molecules
5. Prelims 1998Q122Health & Diseases

   Ergotism is due to consumption of

   acontaminated grainsbrotting vegetablesccontaminated waterdstale cooked food
6. Prelims 1998Q123Biology & Human Body

   The complete conversion of glucose in the presence of oxygen into carbon dioxide and water with release of energy is called

   aaerobic respirationbanaerobic respirationcglycolysisdhydrolysis
7. Prelims 1998Q124Health & Diseases

   The major chemical compound found in human kidney stones is

   aUric acidbCalcium carbonatecCalcium oxalatedCalcium sulphate
8. Prelims 1998Q126Chemistry

   Match List I with List II and select the correct answer using the codes given below the lists:

   List I

   A.Blue vitriol

   B.Epsom salt

   C.Baking soda

   D.Caustic soda

   List II

   1.Sodium bicarbonate

   2.Sodium hydroxide

   3.Magnesium sulphate

   4.Copper sulphate

   aA-3, B-4, C-2, D-1bA-4, B-3, C-1, D-2cA-3, B-4, C-1, D-2dA-4, B-1, C-2, D-1
9. Prelims 1998Q127Chemistry

   Assertion (A): Formic acid is a stronger acid than acetic acid.

   Reason (R): Formic acid is an organic acid.

   aBoth A and R are true, and R is the correct explanation of AbBoth A and R are true, but R is NOT a correct explanation of AcA is true, but R is falsedA is false, but R is true
10. Prelims 1998Q128Physics

    Assertion (A): The temperature of a metal wire rises when an electric current is passed through it.

    Reason (R): Collision of metal atoms with each other releases heat energy.

    aBoth A and R are true, and R is the correct explanation of AbBoth A and R are true, but R is NOT a correct explanation of AcA is true, but R is falsedA is false, but R is true
11. Prelims 1998Q129Chemistry

    Assertion (A): Phenyl is used as a household germicide.

    Reason (R): Phenyl is a phenol derivative and phenol is an effective germicide.

    aBoth A and R are true, and R is the correct explanation of AbBoth A and R are true, but R is NOT a correct explanation of AcA is true, but R is falsedA is false, but R is true
12. Prelims 1998Q130Chemistry

    Assertion (A): Sodium metal is stored under kerosene.

    Reason (R): Metallic sodium melts when exposed to air.

    aBoth A and R are true, and R is the correct explanation of AbBoth A and R are true, but R is NOT a correct explanation of AcA is true, but R is falsedA is false, but R is true
13. Prelims 1997Q13Space Technology

    The tail of a comet is directed away from the sun because

    aas the comet rotates around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alonebas the comet rotates, the lighter mass of the comet is attracted by some star situated in the direction of its tailcthe radiation emitted by the sun exerts a radial pressure on the comet throwing its tail away from the sundthe tail of the comet always exists in the same orientation
14. Prelims 1997Q27Defence & Nuclear Technology

    Which one of the following was used as a chemical weapon in the First World War?

    aCarbon monoxidebHydrogen cyanidecMustard gasdWater gas
15. Prelims 1997Q40IT & Communication

    The world’s fastest computer has been able to perform (as of Dec. 1996)

    a10⁶ operations per secondb10⁹ operations per secondc10¹² operations per secondd10¹⁵ operations per second
16. Prelims 1997Q47Health & Diseases

    A major health mission carried in 1996 was

    awar against leprosybsmall-pox eradicationcpulse polio immunizationdpopularisation of oral rehydration therapy
17. Prelims 1997Q63Biotechnology

    Which one of the following techniques can be used to establish the paternity of a child?

    aProtein analysisbChromosome countingcQuantitative analysis of DNAdDNA finger-printing
18. Prelims 1997Q68Space Technology

    Which one of the following stars is nearest to the earth?

    aPolarisbAlpha CentauricSundSirius
19. Prelims 1997Q106Physics

    The tendency of a liquid drop to contract and occupy minimum area is due to

    aviscositybsurface tensioncdensitydvapour pressure
20. Prelims 1997Q107Physics

    Which one of the following is a vector quantity?

    aMomentumbPressurecEnergydWork