JEE MAIN - Chemistry (2004 - No. 45)
Which one the following statement regarding helium is incorrect?
It is used to fill gas balloons instead of hydrogen because it is lighter and non–inflammable
It is used in gas – cooled nuclear reactors
It is used to produce and sustain powerful superconducting reagents
It is used as cryogenic agent for carrying out experiments at low temperatures
Forklaring
Helium is heavier than hydrogen although it is non-inflammable