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easyMCQAIEEE 20042026Chemistry
1 mark

Which one of the following statements regarding helium is incorrect?

  1. A
    It is used to fill gas balloons instead of hydrogen because it is lighter and non – inflammable
  2. B
    It is used in gas – cooled nuclear reactors
  3. C
    It is used to produce and sustain powerful superconducting reagents
  4. D
    It is used as a cryogenic agent for carrying out experiments at low temperatures

Solution & Step-by-step Explanation

Helium is actually heavier than hydrogen (molar mass vs ). However, it is preferred for gas balloons because it is non-inflammable (noble gas), unlike hydrogen which is highly explosive. Statement A is incorrect because it claims helium is "lighter" than hydrogen.

Practice this question

Try it yourself before checking the explanation above.

Which one of the following statements regarding helium is incorrect?
A
It is used to fill gas balloons instead of hydrogen because it is lighter and non – inflammable
B
It is used in gas – cooled nuclear reactors
C
It is used to produce and sustain powerful superconducting reagents
D
It is used as a cryogenic agent for carrying out experiments at low temperatures

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p-block elementsnoble gases

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