Q. Chandra’s Atmospheric Composition Explorer-2 (CHACE-2), a payload onboard Chandrayaan-2, has recently detected which of the following gas in Moon’s atmosphere?

[A] Oxygen

[B] Argon-40

[C] Hydrogen

[D] Methane

Answer: B
Notes:

Argon-40 in Moon’s Atmosphere:

  • Chandra’s Atmospheric Composition Explorer-2 (CHACE-2), a payload onboard Chandrayaan-2, has detected Noble Gas Argon-40 in Moon’s atmosphere.
  • Argon-40 (Ar-40) is known to exist in the lunar exosphere. But the knowledge on its distribution at higher latitudes is lacking.
  • Now, the CHACE-2 payload has detected the presence of Argon in the equatorial and mid-latitude regions of the Moon.

Source: ForumIAS

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