Science & Technology PYQs

Tap an option to check it. For one question at a time, use Start practice above.

1. Prelims 1999Q126Physics

   Low temperatures (Cryogenics) find application in

   aspace travel, surgery and magnetic levitationbsurgery, magnetic levitation and telemetrycspace travel, surgery and telemetrydspace travel, magnetic levitation and telemetry
2. Prelims 1999Q127Chemistry

   Consider the following statements:

   I.Glass can be etched or scratched by diamond.

   II.Glass can be etched or scratched by hydrofluoric acid.

   III.Glass can be etched or scratched by aqua regia.

   IV.Glass can be etched or scratched by concentrated sulphuric acid.

   Which of these statements are correct?

   aI and IVbII and IIIcI and IIdII and IV
3. Prelims 1999Q128Chemistry

   Assertion (A): To dilute sulphuric acid, acid is added to water and not water to acid.

   Reason (R): Specific heat of water is quite large.

   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
4. Prelims 1999Q129BiotechnologyAnswer disputed

   Assertion (A): Insect-resistant transgenic cotton has been produced by inserting Bt gene.

   Reason (R): The Bt gene is derived from a bacterium.

   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
5. Prelims 1999Q130Biotechnology

   Assertion (A): Dolly was the first cloned mammal.

   Reason (R): Dolly was produced by in-vitro fertilization.

   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
6. Prelims 1999Q145Physics

   A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will

   ahit the monkey at the point aimedbhit the monkey below the point aimedchit the monkey above the point aimeddmiss the monkey altogether
7. Prelims 1998Q5Space Technology

   The damage to the Spektr Module of the Russian Space Station Mir was due to

   acollision with a Soyuz cargo shipbfaulty material design of the Spektr Modulecexplosion inside the space stationdcollision with an asteroid
8. Prelims 1998Q25Space Technology

   Which of the following statements are true about the Indian-born woman astronaut Kalpana Chawla?

   I.She was born in Karnal.

   II.She flew on board the shuttle flight STS-87.

   III.She was trained at the Kennedy Space Centre.

   IV.She did a space-walk to retrieve the Spartan Satellite.

   Select the correct answer using the codes given below:

   aI and IIbII and IIIcI, II and IIIdI, II and IV
9. Prelims 1998Q61Space Technology

   The satellites of which one of the following countries have helped in the preparation of a detailed and complete map of Antarctica?

   aCanadabFrancecRussiadUSA
10. Prelims 1998Q103Chemistry

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

    List I

    I.Potassium bromide

    II.Potassium nitrate

    III.Potassium sulphate

    IV.Mono-potassium tartrate

    List II

    A.Fertiliser

    B.Photography

    C.Bakery

    D.Gunpowder

    Codes:

    aI-B, II-D, III-A, IV-CbI-B, II-D, III-C, IV-AcI-D, II-B, III-C, IV-AdI-D, II-B, III-A, IV-C
11. Prelims 1998Q104Defence & Nuclear Technology

    Which one of the following elements is essential for the construction of nuclear reactors?

    aCobaltbNickelcZirconiumdTungsten
12. Prelims 1998Q106Chemistry

    Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to

    I.Act as a reducing agent.

    II.Remove silica associated with the iron ore.

    III.Function as fuel, to supply heat.

    IV.Act as an oxidizing agent.

    Of these statements:

    aI and II are correctbII and IV are correctcI and III are correctdIII and IV are correct
13. Prelims 1998Q107Chemistry

    Which one of the following metals does not form amalgams?

    aZincbCoppercMagnesiumdIron
14. Prelims 1998Q108Physics

    A fuse is used in main electric supply as a safety device.

    Which one of the following statements about the fuse is correct?

    aIt is connected in parallel with the main switchbIt is made mainly from silver alloyscIt must have a low melting pointdIt must have a very high resistance
15. Prelims 1998Q110Health & Diseases

    Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains

    apolyunsaturated fatty acidsbsaturated fatty acidscessential vitaminsdmore carbohydrates and proteins
16. Prelims 1998Q111Health & Diseases

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

    List I (Disease)

    I.Malaria

    II.Poliomyelitis

    III.Tuberculosis

    IV.Ringworm

    List II (Organism)

    A.Fungi

    B.Bacteria

    C.Virus

    D.Protozoan

    Codes:

    aI-D, II-C, III-B, IV-AbI-D, II-C, III-A, IV-BcI-C, II-D, III-A, IV-BdI-C, II-D, III-B, IV-A
17. Prelims 1998Q112Health & Diseases

    Haemophilia is a genetic disorder which leads to

    adecrease in haemoglobin levelbrheumatic heart diseasecdecrease in WBCdnon-clotting of blood
18. Prelims 1998Q113Chemistry

    Consider the following statements about acetylene:

    I.It is used in welding industry.

    II.It is raw material for preparing plastics.

    III.It is easily obtained by mixing silicon carbide and water.

    Of these statements:

    aI and II are correctbI and III are correctcII and III are correctdI, II and III are correct
19. Prelims 1998Q114Physics

    A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s².

    What will be its velocity after 3 seconds?

    a9.8 m/sb19.6 m/sc29.4 m/sd39.2 m/s
20. Prelims 1998Q116Biotechnology

    Which one of the following types of micro-organisms is most widely used in industries?

    aBacteriabBacteria and fungicBacteria and algaedBacteria, micro-algae and fungi