1.

Arrange the following components in decreasing order according to their percentage present in air.

A. Nitrogen, Oxygen, Argon, Carbon dioxide.
B. Oxygen, Argon, Carbon dioxide, Nitrogen.
C. Nitrogen, Carbon dioxide, Oxygen, Argon.
D. Nitrogen, Oxygen, Carbon dioxide, Argon.
E. None of these
Answer» B. Oxygen, Argon, Carbon dioxide, Nitrogen.


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