NEET Solved Paper 2016 Question 21
Question: Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
Options:
A) $ I _2>Br _2>Cl _2>F _2 $
B) $ Cl _2>Br _2>F _2>I _2 $
C) $ Br _2>I _2>F _2>Cl _2 $
D) $ F _2>Cl _2>Br _2>I _2 $
Show Answer
Answer:
Correct Answer: B
Solution:
$ C{\ell_2}>Br _2\underset{\text{due to high }{\ell_p}-{\ell_p}\text{ repulstion}}{\mathop{\underset{\downarrow }{\mathop{>F _2>I _2}}\ }}\ $
