Which gas constitutes the most significant proportion of the Earth’s atmosphere after Nitrogen and Oxygen?

Topic: Competitive Exams
Subtopic: FPSC/PPSC Past Papers

AArgon

BCarbon Dioxide

CNeon

DHelium

Explanation

• Nitrogen makes up ~78% and Oxygen ~21%.
• Argon is the third most abundant gas, accounting for approximately 0.93%.
• It is an inert noble gas.

Exam Relevance

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