Science & Technology PYQs

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1. Prelims 2003Q129Biology & Human Body

   With reference to normal human beings, consider the following statements:

   1.In response to the presence of HCl, secretin is produced from the duodenum

   2.Enterogastrone is produced in the small intestine in response to the presence of fatty acids

   Which of these statements is/are correct?

   aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
2. Prelims 2003Q130Inventions & Scientists

   Survey of India is under the Ministry of

   aDefencebEnvironment and ForestscHome AffairsdScience and Technology
3. Prelims 2003Q144Chemistry

   With reference to ionic compounds, consider the following statements:

   1.Ionic compounds are insoluble in alcohol.

   2.Ionic compounds in the solid state are good conductors of electricity.

   Which of these statements is/are correct?

   aOnly 1bOnly 2cBoth 1 and 2dNeither 1 nor 2
4. Prelims 2003Q145Chemistry

   Which one of the following statements is not correct?

   aThe presence of NaCl increases the rate of setting of Plaster of ParisbGypsum is added to the cement to slow down its rate of settingcAll alkaline earth metals form hydrated saltsdBarium and Strontium are found free in nature
5. Prelims 2002Q4Physics

   A solid cube just gets completely immersed in water when a 0.2 kg mass is placed on it. If the mass is removed, the cube is 2 cm above the water level. What is the length of each side of the cube?

   a12 cmb10 cmc8 cmd6 cm
6. Prelims 2002Q7Biotechnology

   With reference to the latest developments in stem-cell research, consider the following statements:

   1.The only source of human stem cells are the embryos at blastocyst stage.

   2.The stem cells can be derived without causing destruction to blastocysts.

   3.The stem cells can regenerate themselves in vitro virtually forever.

   4.Indian research centres also created a few cell lines which can be developed into many types of tissues.

   Which of these statements are correct?

   a1, 2, 3 and 4b1, 2 and 3c1, 2 and 4d3 and 4
7. Prelims 2002Q8Space Technology

   In the year 2001, NASA launched a spacecraft to Mars named

   aMars Climate OrbiterbMars Global SurveyorcMars OdysseydMars Polar Lander
8. Prelims 2002Q11Biology & Human Body

   Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

   aIsolationbMutationcNatural SelectiondSexual Reproduction
9. Prelims 2002Q25Biology & Human Body

   Ticks and mites are actually

   aArachnidsbCrustaceanscInsectsdMyriapods
10. Prelims 2002Q26Biology & Human Body

    With reference to the blood in a normal person, which one of the following statements is correct?

    aCompared to arteries, veins are less numerous and hold less of the body’s blood at any given timebBlood cells constitute about 70 % of the total volume of the bloodcWhite Blood Cells (WBC) are made by lymph nodes onlydThe blood has more platelets than WBC
11. Prelims 2002Q28Chemistry

    Which one of the following statements is not correct?

    aThe boiling point of an aqueous solution is higher than that of pure waterbAddition of solutes to a solution causes an increase in its water potentialcThe vapour pressure of the water in a solution is lower than that of pure waterdWhen a solution is separated from water by a semi permeable membrane, water movement can be prevented by applying pressure to the solution
12. Prelims 2002Q32Biology & Human Body

    Consider the following plants:

    1.Bougainvillea

    2.Carnations

    3.Cocoa

    4.Grapes

    Which of these plants are propagated by stem cuttings?

    a1 and 2b2, 3 and 4c1, 3 and 4d1, 2, 3 and 4
13. Prelims 2002Q41Physics

    Consider the following natural phenomena:

    1.Terrestrial heating

    2.Reflection of light

    3.Refraction of light

    4.Diffraction of light Due to which of these phenomena is mirage formed?

    a1 and 2b2, 3 and 4c1 and 3d4 only
14. Prelims 2002Q43Biology & Human BodyAnswer disputed

    In the context of the organic evolution, the loss of limbs of snakes is explained by the phenomenon of

    ause and disuse of organsbadaptation to living in burrowscnatural selectiondinheritance of acquired characters
15. Prelims 2002Q55Biology & Human Body

    When one gene controls two or more different characters simultaneously, the phenomenon is called

    aApomixisbPleiotropycPolyploidydPolyteny
16. Prelims 2002Q65Biology & Human Body

    With reference to the human body, consider the following statements:

    1.The production of somatotropin goes up when a person exercises.

    2.Men's testes produce progesterone.

    3.Women's adrenal glands secrete testosterone.

    4.Stress causes the adrenals to release very less amount of cortisol than usual.

    Which of these statements are correct?

    a1, 2 and 3b1, 3 and 4c2, 3 and 4d1, 2 and 4
17. Prelims 2002Q69Physics

    Consider the following statements:

    1.Light of longer wavelength is scattered much more than light of shorter wavelength.

    2.The speed of visible light in water is 0.95 times its speed in vacuum.

    3.Radio waves are produced by rapidly oscillating electrical currents.

    4.To detect over-speeding vehicles, police use the Doppler effect of reflected short radio waves.

    Which of these statements are correct?

    a1 and 2b1 and 3c2 and 4d3 and 4
18. Prelims 2002Q90Space Technology

    The world's highest ground-based telescopic observatory is located in

    aColombiabIndiacNepaldSwitzerland
19. Prelims 2002Q100Biology & Human Body

    In a bisexual flower, if androecium and gynaecium mature at different times, the phenomenon is known as

    aDichogamybHerkogamycHeterogamydMonogamy
20. Prelims 2002Q110Chemistry

    Match List I (Oxidation number) with List II (The element) and select the correct answer using the codes given below the lists:

    List I (Oxidation number)

    A.2

    B.3

    C.4

    D.6

    List II (The element)

    1.Oxidation number of Mn in MnO₂

    2.Oxidation number of S in H₂S₂O₇

    3.Oxidation number of Ca in CaO₂

    4.Oxidation number of Al in NaAlH₄

    aA-3, B-4, C-1, D-2bA-4, B-3, C-1, D-2cA-3, B-4, C-2, D-1dA-4, B-3, C-2, D-1