Which of the following is a greenhouse gas emitted from paddy fields? MCQ with Answer and Explanation

Question
Which of the following is a greenhouse gas emitted from paddy fields?
A. Oxygen
B. Argon
C. Nitrogen
D. Methane
Answer: Option D
Solution (By JKExamLibrary)
Flooded rice paddies promote anaerobic decomposition of organic matter, producing methane (CH₄). It is a potent greenhouse gas. Livestock also emit methane.
This question belongs to: Science chemistry

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Practice More chemistry Questions

Question #1
The reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe is an example of:
A. Decomposition
B. Displacement
C. Combination
D. Double displacement
Discuss

Correct Answer: Option B

Explanation:
Aluminium displaces iron from iron(III) oxide because Al is more reactive. This is a single displacement (or thermite) reaction. Also redox: Al oxidized, Fe reduced. Combination: one product; decomposition: one reactant.
This question belongs to: Science chemistry
Question #2
Rubber is made more strong and elastic by the process of:
A. Vulcanization
B. Fermentation
C. Hydrogenation
D. Saponification
Discuss

Correct Answer: Option A

Explanation:
Vulcanization involves heating natural rubber with sulfur, forming cross-links between polymer chains. This improves elasticity, tensile strength, and resistance to temperature changes. Hydrogenation adds H₂, saponification makes soap, fermentation produces alcohol.
This question belongs to: Science chemistry
Question #3
Which of the following gases is a major contributor to the greenhouse effect?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Ammonia
Discuss

Correct Answer: Option B

Explanation:
CO₂ is the primary anthropogenic greenhouse gas from fossil fuel combustion. N₂, O₂ not IR active. Ammonia is not a major GHG. Methane, N₂O also contribute.
This question belongs to: Science chemistry
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