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Tardigrade
Question
Chemistry
Noble gases do not occur in
Q. Noble gases do not occur in
2119
213
The p-Block Elements - Part2
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A
Ores
36%
B
Sea water
18%
C
Atmosphere
36%
D
Natural gas
9%
Solution:
Sea water does not contain noble gases. Natural gas found in certain parts of America and Canada contains 2 to 7% helium. At present most of the helium is obtained from this source