CDS Questions on Planets and Outer Space

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CDS 2012-II

1.
Statement I :
I. The planet Neptune appears blue in colour.
Statement II :
II. The presence of methane gas in the atmosphere of Neptune is responsible for its colour.

  1. Both the statements are individually true and statements II is the correct explanation of statement I
  2. Both the statements are individually true and statements II is not the correct explanation of statement I
  3. Statement I is true but statement II is false
  4. Statement I is false but statement II is true

2. Which one among the following is called terrestrial planet?

  1. Mercury
  2. Jupiter
  3. Saturn
  4. Uranus

CDS 2016-I

3. Which one of the following is the correct sequence of the given planets in increasing order of their size (diameter)?

  1. Mars - Venus - Earth - Mercury - Uranus
  2. Mercury - Mars - Venus - Earth - Uranus
  3. Mercury - Mars - Venus - Uranus - Earth
  4. Venus - Mercury - Mars - Earth -Uranus

CDS 2017-I

4. The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by

  1. Galileo
  2. Martin Luther
  3. Johannes Kepler
  4. Copernicus

CDS 2019-I

5. Which of the following planets of our solar system has least mass?

  1. Neptune
  2. Jupiter
  3. Mars
  4. Mercury

6. What is a constellation?

  1. A particular pattern of equidistant stars from the earth in the sky
  2. A particular pattern of stars that may not be equidistant from the earth in the sky
  3. A particular pattern of planets of our solar system in the sky
  4. A particular pattern of stars, planets and satellites in the sky due to their position in the space

CDS 2020-II

7. The four planets closest to the Sun are called

  1. terrestrial planets
  2. giant planets
  3. dwarf planets
  4. gas planets

CDS 2022-I

8. An object weighs 9 N on the surface of the Earth. What would be its weight, when measured on the surface of a planet where the acceleration due to gravity is 9 times that on the surface of the Earth?

  1. The weight would remain the same
  2. The weight would be equal to 1 N
  3. The weight would become 9 times
  4. The weight will be reduced to 1/9 N

9. Which one of the following statements is correct regarding LOFAR (Low Frequency Array)?

  1. It is the world's most powerful radio antenna.
  2. It is a space technology launched by NASA to discover exoplanets.
  3. It is an arrangement of satellites in space for the purpose of creating Satellite Navigation System
  4. It is a wireless communication technology for 5G services.

CDS 2022-II

10. The atmosphere of Planet Venus is made up of thick and yellowish clouds of

  1. Chlorine
  2. Sulphuric acid
  3. Nitric acid
  4. Bromine

11. Which one among the following planets has the largest number of known satellites?

  1. Mars
  2. Neptune
  3. Jupiter
  4. Saturn

CDS 2023-I

12. Which of the following groups of planets is termed as 'gas planets' as they are composed primarily of lighter ices, liquids and gases?

  1. Mars, Jupiter, Neptune, Uranus
  2. Jupiter, Uranus, Nepture, Saturn
  3. Saturn, Mars, Jupiter, Neptune
  4. Neptune, Saturn, Mars, Uranus

CDS 2023-II

13. Consider the following statements about some planets in the solar system:

  1. Mercury has no atmosphere.
  2. Venus has two moons.
  3. There is no land on Jupiter.
  4. Rings of Saturn are composed of lumps of ice and dust.

Which of the statements given above are correct?

  1. 1 and 2 only
  2. 3 and 4 only
  3. 1, 2 and 3
  4. 1, 3 and 4

14. How much percentage of carbon dioxide is present in the atmosphere of Venus and Mars?

  1. 45 - 47%
  2. 52 - 55%
  3. 74 - 77%
  4. 95 - 97%
features of planets

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