NEET · Chemistry · STD 12 - p -Block elements - ll
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules ?
- A \(Br_2 > I_2 > F_2 > Cl_2\)
- B \(F_2 > Cl_2 > Br_2 > I_2\)
- C \(I_2 > Br_2 > Cl_2 > F_2\)
- D \(Cl_2 > Br_2 > F_2 > I_2\)
Answer & Solution
Correct Answer
(D) \(Cl_2 > Br_2 > F_2 > I_2\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{F}_{2}>\mathrm{I}_{2}\) Bond dissociation energy of \(F_{2}\) less than \(C l_{2}\) and \(B r_{2}\) because small size of atom result in strong lone pair repulsion.
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