McqMate
| Q. |
The most abundant inert gas in the atmosphere is – |
| A. | Helium |
| B. | Neon |
| C. | Argon |
| D. | Krypton |
| Answer» C. Argon | |
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Explanation: Argon is the third most common gas in the Earth's atmosphere, at 0.93% (9,300 ppm), making it approximately 23.8 times as abundant as new most common atmospheric gas, carbon dioxide (390 ppm), and more than 500 times as abundant as the next most common noble gas, neon (18 ppm). Nearly all of this argon is radiogenic argon-40 derived from the decay. of potassium-40 in the Earth's crust. |
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