Science & Technology PYQs

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1. Prelims 2010Q13IT & Communication

   Consider the following :

   1.Bluetooth device

   2.Cordless phone

   3.Microwave oven

   4.Wi-Fi device

   Which of the above can operate between 2.4 and 2.5 GHz range of radio-frequency band ?

   a1 and 2 onlyb3 and 4 onlyc1, 2 and 4 onlyd1, 2, 3 and 4
2. Prelims 2010Q21Health & DiseasesAnswer disputed

   Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it difficult to develop an effective malaria vaccine ?

   aMalaria is caused by several species of PlasmodiumbMan does not develop immunity to malaria during natural infectioncVaccines can be developed only against bacteriadMan is only an intermediate host and not the definitive host
3. Prelims 2010Q34Physics

   India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the following statements:

   1.Neutrinos are chargeless elementary particles that travel close to the speed of light.

   2.Neutrinos are created in nuclear reactions of beta decay.

   3.Neutrinos have a negligible, but non-zero mass.

   4.Trillions of Neutrinos pass through human body every second.

   Which of the statements given above are correct?

   a1 and 3 onlyb1, 2 and 3 onlyc2, 3 and 4d1, 2, 3 and 4
4. Prelims 2010Q36Chemistry

   Hydrogen fuel-cell vehicles produce one of the following as “exhaust”.

   aNH₃bCH₄cH₂OdH₂O₂
5. Prelims 2010Q37Health & Diseases

   Recently, LASIK (Laser Assisted In-Situ Keratomileusis) procedure is being made popular for vision correction.

   Which one of the following statements in this context is not correct?

   aLASIK procedure is used to correct refractive errors of the eyebIt is a procedure that permanently changes the shapes of the corneacIt reduces a person’s dependence on glasses or contact lensesdIt is a procedure that can be done on the person of any age
6. Prelims 2010Q57Biotechnology

   Which bacterial strain, developed from natural isolates by genetic manipulations, can be used for treating oil spills ?

   aAgrobacteriumbClostridiumcNitrosomonasdPseudomonas
7. Prelims 2010Q65Biology & Human Body

   Some species of plants are insectivorous. Why ?

   aTheir growth in shady and dark places does not allow them to undertake sufficient photosynthesis and thus they depend on insects for nutrition.bThey are adapted to grow in nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition.cThey cannot synthesize certain vitamins themselves and depend on the insects digested by them.dThey have remained in that particular stage of evolution as living fossils, a link between autotrophs and heterotrophs.
8. Prelims 2010Q88Physics

   What is the principle by which a cooling system (Radiator) in a motor car works?

   aConduction onlybConvectioncRadiation onlydBoth conduction and radiation
9. Prelims 2010Q89IT & Communication

   Which among the following do/does not belong/belongs to the GSM family of wireless technologies?

   aEDGEbLTEcDSLdBoth EDGE and LTE
10. Prelims 2010Q90Health & Diseases

    With reference to the treatment of cancerous tumours, a tool called cyberknife has been making the news. In this context, which one of the following statements is not correct?

    aIt is a robotic image guided systembIt delivers an extremely precise dose of radiationcIt has the capability of achieving sub-millimetre accuracydIt can map the spread of tumour in the body
11. Prelims 2010Q108Physics

    Indiscriminate disposal of used fluorescent electric lamps causes mercury pollution in the environment. Why is mercury used in the manufacture of these lamps?

    aA mercury coating on the inside of the lamp makes the light bright whitebWhen the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiationscWhen the lamp is switched on, it is the mercury which converts the ultra-violet energy into visible lightdNone of the statement given above is correct about the use of mercury in the manufacture of fluorescent lamps
12. Prelims 2010Q110Space Technology

    In the context of space technology, what is “Bhuvan”, recently in the news?

    aA mini satellite launched by ISRO for promoting the distance education in IndiabThe name given to the next Moon Impact Probe, for Chandrayaan-IIcA geoportal of ISRO with 3-D imaging capabilities of IndiadA space telescope developed by India
13. Prelims 2010Q123Biology & Human Body

    Which one of the following processes in the bodies of living organisms is a digestive process ?

    aBreakdown of proteins into amino acidsbBreakdown of glucose into CO₂ and H₂OcConversion of glucose into glycogendConversion of amino acids into proteins
14. Prelims 2010Q124Biology & Human Body

    From the point of view of evolution of living organisms, which one of the following is the correct sequence of evolution ?

    aOtter – Tortoise – SharkbShark – Tortoise – OttercTortoise – Shark – OtterdShark – Otter – Tortoise
15. Prelims 2010Q125Health & Diseases

    Consider the following statements:

    1.Hepatitis B is several times more infectious than HIV/AIDS

    2.Hepatitis B can cause liver cancer

    Which of the statements given above is/are correct ?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
16. Prelims 2010Q126Health & Diseases

    Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition ?

    aWhen inhaled into the human body, CO is converted into CO₂bThe inhaled CO has much higher affinity for haemoglobin as compared to oxygencThe inhaled CO destroys the chemical structure of haemoglobindThe inhaled CO adversely affects the respiratory centre in the brain
17. Prelims 2010Q127Health & DiseasesAnswer disputed

    Consider the following statements:

    1.Every individual in the population is equally susceptible host for Swine Flu.

    2.Antibiotics have no role in the primary treatment of Swine Flu.

    3.To prevent the future spread of Swine Flu in the epidemic area, the swine (pigs) must all be culled.

    Which of the statements given above is/are correct ?

    a1 and 2 onlyb2 onlyc2 and 3 onlyd1, 2 and 3
18. Prelims 2010Q128Health & Diseases

    With regard to the transmission of the Human Immunodeficiency Virus, which one of the following statements is not correct ?

    aThe chances of transmission from female to male are twice as likely as from male to femalebThe chances of transmission are more if a person suffers from other sexually transmitted infectionscAn infected mother can transmit the infection to her baby during pregnancy, at childbirth and by breast feedingdThe risk of contracting infection from transfusion of infected blood is much higher than an exposure to contaminated needle
19. Prelims 2009Q8Defence & Nuclear Technology

    Consider the following statements:

    1.INS Sindhughosh is an aircraft carrier.

    2.INS Viraat is a submarine.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
20. Prelims 2009Q44Space Technology

    Who of the following scientists proved that the stars with mass less than 1·44 times the mass of the Sun end up as White Dwarfs when they die ?

    aEdwin HubblebS. ChandrashekharcStephen HawkingdSteven Weinberg