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Prelims 2025 – 1999 · page 1 of 2

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  1. Consider the following statements :

    Statement I :

    Scientific studies suggest that a shift is taking place in the Earth’s rotation and axis.

    Statement II :

    Solar flares and associated coronal mass ejections bombarded the Earth’s outermost atmosphere with tremendous amount of energy.

    Statement III :

    As the Earth’s polar ice melts, the water tends to move towards the equator.

    Which one of the following is correct in respect of the above statements?

  2. Consider the following countries :

    I.United Kingdom
    II.Denmark
    III.New Zealand
    IV.Australia
    V.Brazil

    How many of the above countries have more than four time zones?

  3. Consider the following statements :

    I.Anadyr in Siberia and Nome in Alaska are a few kilometers from each other, but when people are waking up and getting set for breakfast in these cities, it would be different days.
    II.When it is Monday in Anadyr, it is Tuesday in Nome.

    Which of the statements given above is/are correct?

  4. On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours ?

    1.Equator
    2.Tropic of Cancer
    3.Tropic of Capricorn
    4.Arctic Circle

    Select the correct answer using the code given below :

  5. In the northern hemisphere, the longest day of the year normally occurs in the :

  6. On 21st June, the Sun

  7. Consider the following statements :

    1.The Earth’s magnetic field has reversed every few hundred thousand years.
    2.When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.
    3.When living organisms originated, they modified the early atmosphere of the Earth.

    Which of the statements given above is/are correct ?

  8. Variations in the length of daytime and night-time from season to season are due to

  9. Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

  10. A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He had no instruments to find the direction but he located the polestar. The most convenient way now to reach his village is to walk in the

  11. Which one of the following planets has largest number of natural satellites or moons?

  12. Consider the following statements:

    1.The albedo of an object determines its visual brightness when viewed with reflected light.
    2.The albedo of Mercury is much greater than the albedo of the Earth.

    Which of the statements given above is/are correct?

  13. In order of their distances from the Sun, which of the following planets lie between Mars and Uranus?

  14. What is the average distance (approximate) between the Sun and the Earth?

  15. Which one of the following cities does NOT have the same clock time as that of the other cities at any given instant?

  16. Assertion (A): To orbit around the Sun, the planet Mars takes lesser time than the time taken by the Earth.

    Reason (R): The diameter of the planet Mars is less than that of the Earth.

  17. What is the approximate mean velocity with which the Earth moves round the Sun in its orbit?

  18. Consider the following statements :

    1.Total land area of Earth is approximately 1475 lakh square kilometers
    2.Ratio of land area to water area on Earth is approximately 1 : 4
    3.Maximum percentage of Earth's water is in the Pacific Ocean.

    Which of the statements given above is/are correct?

  19. Consider the following statements :

    1.The axis of the earth’s magnetic field is inclined at 23 ½° to the geographic axis of the earth.
    2.The earth’s magnetic pole in the northern hemisphere is located on a peninsula in northern Canada.
    3.Earth’s magnetic equator passes through Thumba in South India.

    Which of the statements given above is/are correct?

  20. Assertion (A): The same face of the Moon is always presented to the Earth.

    Reason (R): The Moon rotates about its own axis in 23½ days which is about the same time that it takes to orbit the Earth.

  21. Assertion (A): Existence of human life on Venus is highly improbable.

    Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.

  22. Assertion (A): The weight of a body decreases with the increase of latitude on earth.

    Reason (R): The earth is not a perfect sphere.

  23. Among the following which planet takes maximum time for one revolution around the Sun?

  24. Which one of the following statements is correct with reference to our solar system?

  25. Assume that the moon takes exactly 30 days to complete the cycle and also assume that it rises in the East exactly at 6.48 p.m. on the first day. On the fourth day, at what time will it rise?

  26. Who amongst the following was the first to state that the Earth was spherical?

  27. If the stars are seen to rise perpendicular to the horizon by an observer, he is located on the

  28. Along which one of the following meridians did India experience the first light of the sunrise of the new millennium?

  29. If it is 10.00 a.m. I.S.T., then what would be the local time at Shillong on 92°E longitude?

  30. A ship sailing from the eastern extremity of the Aleutian Islands to Dutch Harbour crosses the 180° meridian at 23.30 hrs on January 1, 1999. What time and date will be recorded by the captain of the ship in his diary after one hour journey from the point of crossing of the meridian?

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