Selected MCQ

Current Question
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 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 compound is most soluble in water?
  • A. Benzene
  • B. NaCl
  • C. CH₄
  • D. CCl₄
Correct Answer: B
Explanation:
Ionic compounds dissolve well.
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.
Related Question 4
Which process transports water upward?
  • A. Diffusion
  • B. Osmosis
  • C. Transpiration
  • D. Active transport
Correct Answer: C
Explanation:
Transpiration pull drives ascent.
Related Question 5
Which process loses water in plants?
  • A. Photosynthesis
  • B. Transpiration
  • C. Respiration
  • D. Absorption
Correct Answer: B
Explanation:
Transpiration releases water vapor.