Science & Technology PYQs

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1. Prelims 2004Q150Physics

   A person stands at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is

   aA straight linebAn elliptical pathcA circular pathdA parabolic path
2. Prelims 2003Q7Biology & Human Body

   With reference to the work of human kidney, consider the following statements:

   1.After the waste is removed in the kidney, the cleaner blood is sent back through renal artery.

   2.From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.

   Which of these statements is/are correct?

   aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
3. Prelims 2003Q8Physics

   A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will

   aDecrease in sizebFlatten into a disc-like shapecIncrease in sizedMaintain the same size and shape
4. Prelims 2003Q12Space Technology

   Consider the following statements:

   1.India launched its first full-fledged meteorological satellite (METSAT) in September 2002.

   2.For the first time, the space vehicle PSLV-C4 carried a payload of more than 1000 kg into a geosynchronous orbit.

   Which of these statements is/are correct?

   aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
5. Prelims 2003Q22Physics

   Consider the following statements:

   1.Steam at 100 °C and boiling water at 100 °C contain the same amount of heat.

   2.Latent heat of fusion of ice is equal to the latent heat of vaporization of water.

   3.In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.

   Which of these statements is/are correct?

   a1 and 2b2 and 3cOnly 2dOnly 3
6. Prelims 2003Q26Physics

   Consider the following statements: A four-wheel vehicle moving on a sharp circular path at high speed will

   1.Overturn about its outer wheels.

   2.Overturn about its inner wheels.

   3.Skid outwards.

   4.Skid inwards.

   Which of these statements are correct?

   a1 and 3b2 and 4c2 and 3d1 and 4
7. Prelims 2003Q29ChemistryAnswer disputed

   Which one of the following statements is correct?

   aLiquid sodium is employed as a coolant in nuclear reactorsbCalcium carbonate is an ingredient of toothpastecBordeaux mixture consists of sodium sulphate and limedZinc amalgams are used as a dental filling
8. Prelims 2003Q31Physics

   Diffusion of light in the atmosphere takes place due to

   aCarbon dioxidebDust particlescHeliumdWater vapours
9. Prelims 2003Q37Physics

   An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then

   aRemains horizontalbIs inclined to the horizontal with smaller depth at the rear endcIs inclined to the horizontal with larger depth at the rear enddAssumes parabolic curve
10. Prelims 2003Q45Chemistry

    Consider the following statements The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is

    1.To keep the washing powder dry

    2.To maintain the alkalinity of the powder

    Which of these statements is/are correct?

    aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
11. Prelims 2003Q53Defence & Nuclear Technology

    With reference to Indian defence, which one of the following statements is not correct?

    aWith the induction of Prithvi II, the IAF is the only air force in the world with surface-to-surface ballistic missiles under its commandbSukhoi-30 MKI jet fighters can launch air-to-air and air-to-surface precision missilescTrishul is a supersonic surface-to-air missile with a range of 30 kmdThe indigenously built INS Prabal can launch surface-to-surface missiles
12. Prelims 2003Q61Health & Diseases

    Which one of the following statements is not correct?

    aMilk contains none of the B-vitaminsbVitamin A (retinal) deficiency leads to dry and scaly skincOne of the symptoms of scurvy is pain in the jointsdVitamin B1 (thiamine) deficiency can lead to heart failure
13. Prelims 2003Q63Physics

    Which one of the following statements is not correct?

    aThe velocity of sound in air increases with the increase of temperaturebThe velocity of sound in air is independent of pressurecThe velocity of sound in air decreases as the humidity increasesdThe velocity of sound in air is not affected by the change in amplitude and frequency
14. Prelims 2003Q79Physics

    If the radius of the earth were shrunk by one per cent, its mass remaining the same, the value of ‘g’ on the earth’s surface would

    aincrease by 0.5%bincrease by 2%cdecrease by 0.5%ddecrease by 2%
15. Prelims 2003Q91Biology & Human Body

    Octopus is

    aan arthropodban echinodermca hemichordateda mollusc
16. Prelims 2003Q92Health & Diseases

    Consider the following conditions of sick human body

    1.Swollen lymph nodes

    2.Sweating at night

    3.Loss of memory

    4.Loss of weight

    Which of these are the symptoms of AIDS?

    a1 and 2b2, 3 and 4c1, 2 and 3d1, 2, 3 and 4
17. Prelims 2003Q98Chemistry

    Regarding the atom of a chemical element, the magnetic quantum number refers to

    aorientationbshapecsizedspin
18. Prelims 2003Q99Biology & Human Body

    Consider the following statements:

    1.The common blue green algae Spirogyra and Ulothrix are found in both fresh water ponds and oceans.

    2.The chameleon can look ahead with one eye, and at the same time look behind with another.

    Which of these statements is/are correct?

    aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
19. Prelims 2003Q105Chemistry

    Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.

    Reason (R): In a group, the atomic radius generally increases from top to bottom.

    aBoth A and R are individually true and R is the correct explanation of AbBoth A and R are individually true but R is NOT the correct explanation of AcA is true but R is falsedA is false but R is true
20. Prelims 2003Q108Chemistry

    Assertion (A): Unsaturated fats are more reactive compared with the saturated fats.

    Reason (R): Unsaturated fats have only single bonds in their structure.

    aBoth A and R are individually true and R is the correct explanation of AbBoth A and R are individually true but R is NOT the correct explanation of AcA is true but R is falsedA is false but R is true