What is the most abundant gas in the Earth's atmosphere? MCQ with Answer and Explanation

What is the most abundant gas in the Earth's atmosphere?
A. Carbon Dioxide
B. Hydrogen
C. Oxygen
D. Nitrogen
Answer: Option D
Solution (By JKSSB Mock Tests)
Nitrogen makes up about 78% of Earth's atmosphere.

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Practice More Science and Technology Questions

Question #1
Which mission discovered water on the Moon?
A. Lunar Reconnaissance Orbiter
B. Chandrayaan-1
C. Artemis
D. Chandrayaan-2

Correct Answer: Option B


Explanation:
Chandrayaan-1's Moon Mineralogy Mapper confirmed water.

Question #2
Which Indian state has the highest number of nuclear power plants?
A. Tamil Nadu
B. Maharashtra
C. Gujarat
D. Karnataka

Correct Answer: Option A


Explanation:
Tamil Nadu has the highest number of nuclear reactors.

Question #3
What is the use of 'Augmented Reality'?
A. Complete virtual world
B. Weather mapping
C. Overlay digital content on real world
D. Only gaming

Correct Answer: Option C


Explanation:
AR enhances real-world experience.