Which one of the following statements regarding helium is incorrect?

Options

A. It is used to produce and sustain powerful super conducting magnets
B. It is used in gas-cooled nuclear reactors
C. It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable
D. It is used as a cryogenic agent for carrying out experiments at low temperature

Answer

C

Explanation

Helium is twice as heavy as hydrogen, its lifting power is 92% of that of hydrogen, Helium has the lowest melting point of any element which makes liquid helium an ideal coolant formany extremely low temperature application such as crystals, a sophisticated measuring instrument based on super conducting magnet and cryogenic research where, temperature close to absolute zero are needed.