1. Our Universe

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

(a) Chlorine

(b) Sulphuric acid

(c) Nitric acid

(d) Bromine

Ans:- (b)

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

(a) Mars

(b) Neptune

(c) Jupiter

(d) Saturn

Ans:- (d)

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

(a) Mars, Jupiter, Neptune, Uranus

(b) Jupiter, Uranus, Neptune, Saturn

(c) Saturn, Mars, Jupiter, Neptune

(d) Neptune, Saturn, Mars, Uranus

Ans:- (b)

4. What is the radius of the earth?

(a) 7456 km

(b) 6371 km

(c) 5619 km

(d) 4728 km

Ans:- (b)

5. If the orbit of a planet is an ellipse then what is the point at which the Sun is located called?

(a) Centre

(b) Circumcentre

(c) Incentre

(d) Focus

Ans:- (d)

6. Our solar system is a part of which galaxy?

(a) Andromeda

(b) Triangulum

(c) Milky Way

(d) Bode's

Ans:- (c)

7. Name the planet that has a moon called "Ganymede".

(a) Jupiter

(b) Venus

(c) Mars

(d) Saturn

Ans:- (a)

8. Which of the following has highly elongated elliptical orbit?

(a) Asteroid

(b) Comet

(c) Meteorite

(d) Meteor

Ans:- (b)

9. How many kilometres and represented by 1º of latitude?

(a) 321 km

(b) 211 km

(c) 111 km

(d) 91 km

Ans:- (c)

10. Out of total Oxygen present in the earth's atmosphere, the estimated production of oxygen by Amazon forest through photosynthesis is-

(a) 40 percent

(b) 50 percent

(c) 70 percent

(d) 20 percent

Ans:- (d)

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

(a) 45-47%

(b) 52-55%

(c) 74-77%

(d) 95-97%

Ans:- (d)

12. The scientist who first discovered that the earth revolves round the sun was-

(a) Newton

(b) Dalton

(c) Copernicus

(d) Einstein

Ans:- (c)

13. In the universe, what are pulsars?

(a) A group of stars

(b) Rotating neutron stars

(c) Explosion of a star

(d) Radio waves emitted by a star

Ans:- (b)

14. In the universe, what are pulsars?

(a) A group of stars

(b) Rotating neutron stars

(c) Explosion of a star

(d) Radio waves emitted by a star

Ans:- (b)

15. The shortest day length that occurs in the Northern hemisphere is on-

(a) 21st March

(b) 23rd September

(c) 22nd November

(d) 22nd December

Ans:- (d)

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

(a) Neptune

(b) Jupiter

(c) Mars

(d) Mercury

Ans:- (d)

17. Mars Atmosphere and Volatile Evolution Mission is-

(a) A spacecraft launched by India

(b) A collaborative project of ISRO and NASA

(c) A spacecraft launched by USA

(d) A collaborative project of NASA and European

Ans:- (c)

18. Which one of the following planets takes least time to complete one rotation on its axis?

(a) Mercury

(b) Earth

(c) Jupiter

(d) Neptune

Ans:- (c)

19. Which one of the following is known as the life-supporting zone of the Earth?

(a) Ecosystem

(b) Biosphere

(c) Atmosphere

(d) Biome

Ans:- (b)

20. On 21st June, the Sun-

(a) Does not set below the horizon at the Arctic Circle

(b) Does not set below the horizon at Antarctic Circle

(c) Shines vertically overhead at noon on the Equator

(d) Shines vertically overhead at the Tropic of Capricorn

Ans:- (a)

21. What is the time difference between the actual sunset and apparent sunset?

(a) About half a minute

(b) About one minute

(c) About two minutes

(d) About twenty minutes

Ans:- (c)

22. Who among the following was the first to explain that the rotation of the earth on its own axis accounts for the daily rising and setting of the sun?

(a) Aryabhatta

(b) Bhaskara

(c) Brahmagupta

(d) Varahamihira

Ans:- (a)

23. Geodesy is the science that deals with-

(a) Dating of terrestrial rock

(b) Measurement of dimension of the earth

(c) Measurement of elevation and depression of the earth

(d) Recording of the changes undergone by the crust

Ans:- (b)

24. The theory of continental drift was developed by-

(a) J.J. Wilson

(b) A. Wegener

(c) Du Toit

(d) H. Hess

Ans:- (b)

25. The twinkling of a star is due to-

(a) The variation in the intensity of light emitted by it

(b) The variation in the composition of the star with time

(c) The transit of other celestial objects across the line of sight

(d) The atmospheric refraction of starlight

Ans:- (d)

26. Which acid makes the atmosphere of Venus have thick white and yellowish clouds?

(a) Sulphuric acid

(b) Nitric acid

(c) Acetic acid

(d) Hydrochloric acid

Ans:- (a)

27. The atmosphere of Saturn cotains which one of the following gas in large quantity?

(a) Sulphur dioxide

(b) Carbon monoxide

(c) Methane

(d) Nitrogen

Ans:- (c)

28. Which of the following statements about Ganymede is NOT correct?

(a) It is bigger than Mercury

(b) It is the largest natural satellite in our solar system

(c) It is the only moon known to have its own internally generated magnetic field

(d) It revolves around Saturn

Ans:- (d)

29. An effective Coriolis force results from-

(a) Solar system

(b) Earth rotation

(c) Interior of the earth

(d) Colorado and Gulf Streams

Ans:- (b)

30. Which of the following planets has the least density?

(a) Earth

(b) Mars

(c) Venus

(d) Saturn

Ans:- (d)

31. What is the periodicity of Halley's comet?

(a) 30-31 years

(b) 45-46 years

(c) 85-86 years

(d) 75-76 years

Ans:- (d)

32. Which one of the following hypothesis/theory explains the origin of the universe?

(a) Planetesimal hypothesis 

(b) Binary theory

(c) Big Bang theory

(d) Nebular hypothesis

Ans:- (c)

33. On which day does the Northern Hemisphere? Summer Solistice occur in-

(a) 22nd December

(b) 21st March

(c) 23rd September

(d) 21st June

Ans:- (d)

34. What is a Constellation?

(a) A particular pattern of equidistant stars from the earth in the sky

(b) A particular pattern of stars that may not be equidistant from the earth in the sky.

(c) A particular pattern of planets of our solar system in 5 the sky.

(d) A particular pattern of stars, planets and satellites in the sky due to their position in the space

Ans:- (d)

35. The name of Saturn's largest moon is-

(a) Mimas

(b) Enceladus

(c) Titan

(d) Tethys

Ans:- (c)

36. Which one of the following planets has the shortest day?

(a) Earth

(b) Mars

(c) Mercury

(d) Venus

Ans:- (a)

37. In a solar or lunar eclipse, the region of earth's shadow is divided into-

(a) Four parts

(b) Five parts

(c) Two parts

(d) Three parts

Ans:- (c)

38. The rate of decrease of temperature in the troposphere is-

(a) 5.4°C

(b) 6.4°C

(c) 7°C

(d) 7.4°C

Ans:- (b)

39. The total number of planets revolving around the sun are-

(a) Seven

(b) Eight

(c) Five

(d) Six

Ans:- (b)

40. Day and Night are equal at the-

(a) Prime Meridian

(b) Antarctic

(c) Equator

(d) Poles

Ans:- (c)

41. The Earth is nearest to the Sun on-

(a) 4 July

(b) 21 March

(c) 23 September

(d) 3 January

Ans:- (d)

42. Which one of the following planets do not have a satellite?

(a) Earth

(b) Mars

(c) Jupiter

(d) Mercury

Ans:- (d)

43. How many degrees does the Earth rotate about its own axis in one hour?

(a) 24

(b) 15

(c) 20

(d) 10

Ans:- (b)

44. Objects that shine in the night sky are known as-

(a) Constellations

(b) Celestial bodies

(c) Meteoroids

(d) Asteroids

Ans:- (b)

45.  ….... is the hottest planet in the solar system.

(a) Mercury

(b) Earth

(c) Mars

(d) Venus

Ans:- (d)

46. The approximate diameter of the sun is times the diameter of Earth.

(a) 92

(b) 109

(c) 123

(d) 146

Ans:- (b)

47. Which planet has a moon called Ganymede?

(a) Mercury

(b)Venus

(c) Mars

(d) Jupiter

Ans:- (d)

48. Which is the smallest planet in the Solar system?

(a) Pluto

(b) Jupiter

(c) Mercury

(d) Earth

Ans:- (c)

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

(a) Galileo

(b) Martin Luther

(c) Johannes Kepler

(d) Copernicus

Ans:- (c)

50. Which network topology requires a 'Hub' for its working?

(a) Ring

(b) Both Bus and Star

(c) Star

(d) Bus

Ans:- (c)

51. The physics phenomenon when, in polar regions like Alaska and Northern Canada, a splendid display of colours is seen in the sky is called a/an-

(a) Aurora borealis

(b) Star shower

(c) Active galactic nucleus

(d) Star's intrinsic luminosity

Ans:- (a)

52. The solar eclipse occurs when-

(a) An asteroid comes between the sun and the moon

(b) The moon moves too far away from the sun

(c) The sun comes between the moon and the earth

(d) The moon comes between the earth and the sun

Ans:- (d)

53. Eratosthenes, a Greek philosopher measured the Earth's circumference based on the angle of Sun rays at two different points. Which cities were they?

(a) Alexandria and Syene

(b) Syene and Troy

(c) Alexandria and Troy

(d) Alexandria and Thebes

Ans:- (a)

54. What is the periodicity of Halley's comet?

(a) 30-31 years

(b) 45-46 years

(c) 85-86 years

(d) 75-76 years

Ans:- (d)

55. 'God Particle' is-

(a) Neutrino

(b) Higgs Boson

(c) Meson

(d) Positron

Ans:- (b)

56. In the sequence of planets in the solar system, which planet comes in between Mars and Saturn?

(a) Mercury

(b) Venus

(c) Jupiter

(d) Uranus

Ans:- (c)

57. When does the entire earth experience equal days and nights?

(a) Day of summer solstice

(b) At orbital plane

(c) Day of equinox

(d) Day of winter solstice

Ans:- (c)

58. What is the colour of the light emitted by the Sun?

(a) Red

(b) Yellow

(c) White

(d) Orange

Ans:- (c)

59. Lucifer is another name for the planet.

(a) Mars

(b) Venus

(c) Jupiter

(d) Saturn

Ans:- (b)

60. Planetary scientists call the thin gaseous envelope around the Moon as the …….

(a) Lunar endosphere

(b) Lunar stratosphere

(c) Lunar exosphere

(d) Lunar thermosphere

Ans:- (c)

61. Which one of the following is the largest recognized constellation?

(a) Hydra

(b) Dorado

(c) Antila

(d) Crux

Ans:- (a)

62. What is the other name for 'Orion' Constellation?

(a) Piper

(b) Fighter

(c) Predator

(d) Hunter

Ans:- (d)

63. Black-hole is-

(a) A flight recorder in aeroplane

(b) A spot on the sun

(c) A place in Antarctica

(d) A collapsed star

Ans:- (d)

64. The constellation 'Sapta Rishi' is known to Westerners as the-

(a) Seven Monks

(b) Alpha Centauri

(c) Big Dipper

(d) Small Bear

Ans:- (c)

65. Ozone layer, which absorbs the ultra-violet radiation, is found in which one of the following layer of the atmosphere?

(a) Ionosphere

(b) Troposphere

(c) Mesosphere

(d) Stratosphere

Ans:- (d)

66. Baily's beads can be observed during-

(a) Occulation of Jupiter

(b) Partial solar eclipse

(c) Lunar eclipse

(d) Total solar eclipse

Ans:- (d)

67. The physics phenomenon when, in polar regions like Alaska and Northern Canada, a splendid display of colours is seen in the sky is called a/an-

(a) Aurora borelis

(b) Star shower

(c) A active galactic nucleus

(d) Star's intrinsic luminosity

Ans:- (a)

68. Which of the following is the outer layer of the Earth that is made of plates which fit together like a jigsaw puzzle?

(a) Lithosphere

(b) Asthenosphere

(c) Mesosphere

(d) Biosphere

Ans:- (a)

69. The tides in the sea are primary due to-

(a) The atmospheric effect of the Earth

(b) The gravitational effect of Venus on the Earth

(c) The gravitational of the sun on the Earth

(d) The gravitational effect of the Moon on the Earth

Ans:- (d)

70. Even after sunset, the air near the Earth's surface continue to receive heat due to-

(a) Insolation

(b) Terrestrial Radiation

(c) Conduction

(d) Convection

Ans:- (b)

71. Which one of the following is the brightest star in the Orion Constellation?

(a) Betelgeuse

(b) Alnilam

(c) Eta Orionis

(d) Rigel

Ans:- (d)

72. In which one of the following layers of the atmosphere all weather phenomenon occur?

(a) Mesosphere

(b) Troposphere

(c) Thermosphere

(d) Stratosphere

Ans:- (b)

73. Due to attraction of the sun and the moon, what is the fequency of up and falls down of ocean water in a day?

(a) Three

(b) One

(c) Four

(d) Two

Ans:- (d)

74. The word "blood moon" is used for-

(a) Lunar Eclipse

(b) Full moon

(c) Solar Eclipse

(d) Half moon

Ans:- (a)

75. Which one of the following planets has the highest density?

(a) Mercury

(b) Venus

(c) Jupiter

(d) Earth

Ans:- (d)

76. The composition of gases in exosphere is-

(a) Helium and Hydrogen

(b) Neon and Oxygen

(c) Neon and Hydrogen

(d) Helium and Neon

Ans:- (a)

77. Which Greek philosopher coined the term "Geography" in the 3rd century BCE?

(a) Euclid

(b) Plato

(c) Eratosthenes

(d) Clio

Ans:- (c)