Ordinary dry air consists of the following: (1) Nitrogen (2) Oxygen (3) Argon (4) Carbon dioxide What is the decreasing sequence of these in percentages ?
Options
(a)1, 2, 3 and 4
(b)1, 2, 4 and 3
(c)2, 1, 3 and 4
(d)2, 1, 4 and 3
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Class 7Air— NCERT Geography, Chapter 4. The earth is wrapped in a blanket of air, the atmosphere, which gives us the air we breathe, shields us from the sun's harmful rays and keeps temperatures liveable. Dry…
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