Science & Technology – UPSC Prelims PYQs
668 questions · 1995–2026 · answers as per the UPSC key · page 14 of 14
Who among the following anticipated Newton by declaring that all things gravitate to the earth?
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Optical fibre works on the principle of
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Suppose a rocketship is receding from the earth at a speed of 2⁄10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
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Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers, etc.?
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Cryogenic engines find applications in
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An air bubble in water will act like a
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The difference between a nuclear reactor and an atomic bomb is that
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Which one of the following sets is correctly matched?
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A person with ‘AB’ blood group is sometimes called a universal recipient because of the
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Which one of the following is a membrane that protects the developing embryo from desiccation?
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Which one of the following antimicrobial drugs is suitable for treatment of both tuberculosis and leprosy?
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Most of the desert plants bloom during night time because
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The only snake that builds a nest is
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Which of the following elements are present in all proteins? I. Carbon II. Hydrogen III. Oxygen IV. Nitrogen
Select the correct answer from the codes given below:
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Which one of the following hormones contains iodine?
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“By weaving threads of physics, chemistry and biology into a rich tapestry, this remarkable scientist provided a unifying molecular view of the world... He touted the wonderful properties of Vitamin C first as a cure of common cold and later as a preventive agent against cancer.” One of science’s major figures of all time referred to above is
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“It begins as a single cell and grows into a merciless disease that claims millions of lives year after year. But scientists are steadily unlocking its mysteries, and the fight against it may now have reached a dramatic turning point. New discoveries promise better therapies and hope in the war against ...” The disease referred to in the above quotation is
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‘Yellow cake’, an item of smuggling across borders is