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JEE · NEET Previous Year Question

Amongst O, S, Se and Te the one with highest boiling point is :

Topic: JEE PYQ

Answer: A. Full step-by-step solution below.

  1. AO because of H-bonding.
  2. BTe because of higher molecular weight.
  3. CS because of H-bonding.
  4. DSe because of lower molecular weight

Correct answer: A

Solution

(a)Intermolecular forces between S, Se and Te molecules are purely van der Waal’s force of attraction while in water there is stronger H-bonding between the water molecules. H-bond is stronger than van der Waal's force of attraction and thus more energy is required for converting O(λ) to (O)(g).

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