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NEET levelSingle correct optionDifficulty 1 of 3ph121

Which noble gas does not form clathrates with quinol because its atoms are too small to be trapped in the cages?

  1. AKr
  2. BHe
  3. CAr
  4. DXe

Answer: B

Ar, Kr and Xe are trapped in the cavities of the quinol cage by dipole-induced dipole interactions. The helium atom is too small to be retained, so it does not form such clathrates. The answer is He.
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