Which one of the following statements regarding helium is incorrect?

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

It is used as a cryogenic agent for carrying out experiments at low temperatures

It is used to produce and sustain powerful superconducting magnets

It is used in gas-cooled nuclear reactors

answer is A.

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Detailed Solution

Helium is twice as heavy as hydrogen and has a 92% lower lifting capacity. Helium has the lowest melting and boiling points of all the elements, making liquid helium an excellent coolant for many applications requiring extremely low temperatures, such as cryogenic research and superconducting magnets.

In order to cool down super conduction magnets, helium is employed. This is necessary for them to function. It also serves as protection for welding firms. The same process is used to create silicon, germanium, zirconium, titanium, and zircon.

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