Selected MCQ

Current Question
Which gas is greenhouse gas?
  • A. O₂
  • B. CO₂
  • C. N₂
  • D. He
Correct Answer: B
Explanation:
CO₂ traps heat.
Related Question 1
Which gas is most abundant greenhouse gas?
  • A. CO₂
  • B. CH₄
  • C. H₂O vapor
  • D. O₃
Correct Answer: C
Explanation:
Water vapor dominates greenhouse effect.
Related Question 2
Which gas contributes most to greenhouse effect after water vapor?
  • A. Methane
  • B. CO₂
  • C. Ozone
  • D. Nitrogen
Correct Answer: B
Explanation:
CO₂ is major anthropogenic greenhouse gas.
Related Question 3
Which greenhouse gas has the greatest current overall contribution to the natural greenhouse effect?
  • A. Argon
  • B. Water vapor
  • C. Neon
  • D. Helium
Correct Answer: B
Explanation:
Water vapor is the most abundant and influential natural greenhouse gas.