Solar System MCQs with answers Page - 42

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Q. Mercury’s surface gravity compared to Earth is approximately:

  • (A) 0.38 g
  • (B) 0.25 g
  • (C) 0.50 g
  • (D) 0.76 g

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Q. The phenomenon of 'hot poles' on Mercury occurs due to:

  • (A) Axial tilt
  • (B) Orbital eccentricity
  • (C) Solar flares
  • (D) Magnetic storms

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Q. How long is Mercury's sidereal rotation period?

  • (A) 24 hours
  • (B) 58.6 Earth days
  • (C) 88 Earth days
  • (D) 176 Earth days

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Q. Which planet has the second smallest axial tilt after Mercury?

  • (A) Venus
  • (B) Earth
  • (C) Jupiter
  • (D) Uranus

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Q. The density of Mercury is closest to that of:

  • (A) Earth
  • (B) Mars
  • (C) Venus
  • (D) Moon

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Q. Mercury's lack of significant atmosphere results in:

  • (A) Uniform surface temperatures
  • (B) Extremely cold temperatures only
  • (C) Extreme temperature variations
  • (D) Permanent cloud cover

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Q. Mercury's sky appears black because:

  • (A) It has no atmosphere
  • (B) It has a thick atmosphere
  • (C) It is always night
  • (D) It is covered by clouds

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Q. Mercury's orbital period is:

  • (A) 225 Earth days
  • (B) 88 Earth days
  • (C) 365 Earth days
  • (D) 176 Earth days

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Q. Which of the following spacecraft provided the first close-up images of Mercury?

  • (A) Messenger
  • (B) Mariner 10
  • (C) Voyager 1
  • (D) BepiColombo

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Q. Which of these gases is not part of Mercury's exosphere?

  • (A) Oxygen
  • (B) Sodium
  • (C) Hydrogen
  • (D) Methane
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