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Chemistry · Oct / Nov 2021 · Paper 11 · Question 29

5070Noble gases

Which statement about the properties of the elements in Group VIII of the Periodic Table, helium to xenon, is correct?

  1. AArgon reacts with iron to form a compound.
  2. BHelium is less dense than air.
  3. CThe elements change from gas to solid down the group.
  4. DThe elements exist as covalent molecules.

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Correct answer: B. Helium is less dense than air.

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