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Home Questions & Answers Science Question Answers The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs

    The increasing amount of carbon dioxide in the air is slowly raising the temperature of the
    atmosphere, because it absorbs

  • the water vapour of the air and retains its heat
  • the ultraviolet part of the solar radiation
  • all the solar radiations
  • the infrared part of the solar radiation

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To meet its rapidly growing energy demand, some opine that India should pursue research and
development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium
hold over uranium?
  • 1. Thorium is far more abundant in nature than uranium.
  • 2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
  • 3. Thorium produces less harmful waste compared to uranium.
Which of the statements given above is/are correct?
With reference to the scientific progress of ancient India, which of the statements given below are
correct?
  • 1. Different kinds of specialized surgical instruments were in common use by 1st century AD.
  • 2. Transplant of internal organs in the human body had begun by the beginning of 3rd century AD.
  • 3. The concept of sine of an angle was known in 5th century AD.
  • 4. The concept of cyclic quadrilaterals was known in 7th century AD.
Select the correct answer using the codes given below:
Electrically charged particles from space travelling at speeds 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?
Which of the following is/are by the scientists as evide evidences for the continued expansion of
universe?
  • 1. Detection of microwave space
  • 2. Observation of redshift phenomenon in space
  • 3. Movement of asteroids in space
  • 4. Occurrence of sup explosions in space
Select the correct answer use codes given below:
A team of scientists at Brookhaven National Laboratory including those from India created the
heavies anti-matter (anti-helium nucleus) What is/are the implications of the creation anti-matter?
  • 1. It will make mineral prospecting and oil exploration easier and cheaper.
  • 2. It will help probe the possibility of the existence of stars a galaxies made of anti-matter.
  • 3. It will help understand evolution of the universe.
Select the correct answer using codes given below:

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