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Question 600337
JEE Chemistry · Hard

Chemical Bonding: Bond energy MCQ

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Bond energyHardQuestion 600337

Question

The enthalpy of atomisation of Cl₂ (g) is equal to:
  1. A
    Bond dissociation energy of Cl−Cl
    Correct
  2. B
    Half the bond dissociation energy
  3. C
    Twice the bond dissociation energy
  4. D
    Lattice energy

Correct answer

Bond dissociation energy of Cl−Cl

Explanation

Cl₂ → 2Cl(g), ΔH = bond dissociation energy = enthalpy of atomisation of Cl₂ (since breaking one mole of Cl₂ gives 2 mol Cl atoms). Per mole Cl₂: ΔHatom = BDE of Cl₂.

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