Which one of the following statements regardi | vedclass

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(C) Helium $(He)$ is twice as heavy as hydrogen $(H_2)$. While it is non-inflammable,it is not lighter than hydrogen. Therefore,the statement that it

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It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable.

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(C) Helium $(He)$ is twice as heavy as hydrogen $(H_2)$. While it is non-inflammable,it is not lighter than hydrogen. Therefore,the statement that it is lighter than hydrogen is incorrect.Helium has the lowest melting and boiling point of any element,which makes liquid helium an ideal coolant for many extremely low-temperature applications,such as superconducting magnets and cryogenic research where temperatures close to absolute zero are needed.$He$ is also used in gas-cooled nuclear reactors as a heat transfer agent.

Which one of the following statements regarding helium is incorrect?

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