Hydrogen is not used in the meteorological balloon as it is:
A
Highly inflammable
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B
Lighter than air
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C
Heavier than air
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D
Non-combustible
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Solution
The correct option is A Highly inflammable Hydrogen is not used in the meteorological balloon as it is highly inflammable in nature. It is lighter than air but hydrogen is avoided as it is highly combustible. Hence hydrogen is replaced by helium in the meteorological balloon.