NEET 2016 Chemistry question

ChemistryThermodynamicsNEET 2016

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

Answer: (2)

Solution

The bond dissociation enthalpies (kJ mol) are (242) > (193) > (158) > (151). Down the group the bond becomes longer and weaker, which explains $Cl_2 >

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Question ID VK-091900