Question

why has helium replaced the use of hydrogen in airstrip or weather balloons?

Answer 1

Answer:

Helium has replaced the use of hydrogen in airstrip or weather balloons as atmosphere contains oxygen and hydrogen reacts violently with oxygen, nevertheless helium is the second lightest gas and also a inert gas so it won't react with any other substance.

Explanation:

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Answer 2

Answer:

Helium is more preferable than hydrogen because helium is non-combustible & that's why it is more safe to use.

Explanation:

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