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NDA 2021 GAT · General Knowledge · Ecology and Environment · easy

The most abundant gas in the Earth's atmosphere is

Single correct option

The most abundant gas in the Earth's atmosphere is
  1. A. oxygen
  2. B. nitrogen
  3. C. argon
  4. D. carbon dioxide
Show answer and solution

Answer: (B) nitrogen

Nitrogen makes up about 78 percent of dry air, oxygen about 21 percent, argon nearly 0.9 percent and carbon dioxide only around 0.04 percent. Oxygen is the most commonly mistaken answer because it is essential to life.
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Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake