Which one of the following statements regarding helium is not correct?

Which one of the following statements regarding helium is not correct?
  1. It is used to fill gas balloons instead of hydrogen because it is lighter and not flammable
  2. It is used in gas cooled nuclear reactors
  3. It is used to produce and sustain powerful super conducting magnets
  4. It is not used as a cryogenic agent

Solution

Liquid helium is used as a cryogenic agent. Therefore, statement (d) is incorrect. Rest of the given statements are correct.

Asked in: AP EAMCET 2019 (20 Apr Shift 2)

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