Question:medium

Match the LIST-I with LIST-II:

LIST-I (Gases)LIST-II (% in Atmosphere)
A. Nitrogen (N2)
B. Oxygen (O2)
C. Argon (Ar)
D. Carbon dioxide (CO2)		I. 20.946%
II. 0.934%
III. 78.084%
IV. 0.036%

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Remember the 78-21 rule for Nitrogen and Oxygen. This allows you to identify options A-III and B-I immediately.
Updated On: May 21, 2026
  • A-III, B-I, C-II, D-IV
  • A-I, B-II, C-III, D-IV
  • A-II, B-IV, C-I, D-III
  • A-III, B-II, C-IV, D-I
Show Solution

The Correct Option is A

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