NEET2021Chemistry-Bond Enthalpy in Haloalkanes
NEET 2021 Chemistry C–X Bond Strength MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The correct sequence of bond enthalpy of C–X bond is :
A
CH₃–F < CH₃–Cl < CH₃–Br < CH₃–I
B
CH₃–F > CH₃–Cl > CH₃–Br > CH₃–I
C
CH₃–F < CH₃–Cl > CH₃–Br > CH₃–I
D
CH₃–Cl > CH₃–F > CH₃–Br > CH₃–I
Correct Answer
Option B
Detailed Explanation
The bond enthalpy decreases as the size of the halogen atom increases. Therefore, the bond enthalpy order is CH₃–F > CH₃–Cl > CH₃–Br > CH₃–I.
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