Science & Technology PYQs

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1. Prelims 1996Q120Physics

   Total internal reflection can take place when light travels from

   adiamond to glassbwater to glasscair to waterdair to glass
2. Prelims 1996Q121Physics

   Assertion (A): Transformer is useful for stepping up or stepping down voltages.

   Reason (R): Transformer is a device used in D.C. circuits.

   In the context of the above two statements, which one of the following is correct?

   aBoth A and R are true and R is the correct explanation of A.bBoth A and R are true but R is not a correct explanation of A.cA is true but R is false.dA is false but R is true.
3. Prelims 1996Q122Physics

   Domestic electrical wiring is basically a

   aseries connectionbparallel connectionccombination of series and parallel connectionsdseries connection within each room and parallel connection elsewhere
4. Prelims 1996Q124Physics

   A simple machine helps a person doing

   aless work.bthe same amount of work with lesser force.cthe same amount of work.dthe same amount of work much faster.
5. Prelims 1996Q125Space TechnologyAnswer disputed

   Consider the following statements: A person in a spaceship located half-way between the earth and the sun will notice that the

   I.Sky is jet black.

   II.Stars do not twinkle.

   III.Temperature outside the spaceship is much higher than that on the surface of the earth.

   Of these statements

   aOnly III is correctbI and II are correctcI and III are correctdI, II and III are correct
6. Prelims 1996Q127Physics

   The alpha particle carries two positive charges. Its mass is very nearly equal to that of

   atwo protonsban atom of heliumcsum of masses of two positrons and two neutronsdtwo positrons as each positron carries a single positive charge
7. Prelims 1996Q128Chemistry

   The offending substance in the liquor tragedies leading to blindness, etc. is

   aethyl alcoholbamyl alcoholcbenzyl alcoholdmethyl alcohol
8. Prelims 1996Q129Chemistry

   Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?

   aAluminiumbChromiumcNickeldTungsten
9. Prelims 1996Q130Biology & Human Body

   Match List I (Physiological processes) with List II (Cell organelles) and select the correct answer by using the codes given below the lists:

   List I

   I.Photosynthesis

   II.Mineral uptake

   III.Respiration

   IV.Protein Synthesis

   List II

   A) Plasma membrane

   B) Chloroplast

   C) Mitochondria

   D) Ribosomes

   Codes:

   aI-A, II-B, III-C, IV-DbI-A, II-B, III-D, IV-CcI-B, II-A, III-C, IV-DdI-B, II-A, III-D, IV-C
10. Prelims 1995Q1Space Technology

    A meteor is

    aa rapidly moving starba piece of matter which has entered the earth’s atmosphere from outer spacecpart of a constellationda comet without a tail
11. Prelims 1995Q44Inventions & Scientists

    The Nobel Prize for deciphering the language of bees was awarded to

    aH. G. KhuranabK. V. FrischcJulian HuxleydDorothy Hodgkins
12. Prelims 1995Q80Space Technology

    Comet Shoemaker-Levy 9 hit the planet

    aPlutobMarscJupiterdSaturn
13. Prelims 1995Q100Chemistry

    Which one of the following is a mixed fertilizer?

    aCAMbUreacAmmonium SulphatedNPK
14. Prelims 1995Q101ChemistryAnswer disputed

    Which one of the following polymers is widely used for making bullet-proof material?

    aPolyvinyl chloridebPolyamidescPolyethylenedPolycarbonates
15. Prelims 1995Q102Chemistry

    The chemical used as a ‘fixer’ in photography is

    asodium sulphatebsodium thiosulphatecammonium persulphatedborax
16. Prelims 1995Q103IT & Communication

    The technique used to transmit audio signals in television broadcasts is

    aAmplitude ModulationbFrequency ModulationcPulse Code ModulationdTime Division Multiplexing
17. Prelims 1995Q105Physics

    Which one of the following can be used to confirm whether drinking water contains a gamma-emitting isotope or not?

    aMicroscopebLead platecScintillation counterdSpectrophotometer
18. Prelims 1995Q106Physics

    The normal temperature of human body on the Kelvin scale is

    a280b290c300d310
19. Prelims 1995Q107Physics

    When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

    apitch, loudness and qualitybpitch and loudnesscquality onlydloudness only
20. Prelims 1995Q108Physics

    Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape.

    Reason (R): The refractive index of diamond is less than that of glass.

    In the context of the above two statements, which one of the following is correct?

    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