Question

Which of the following bond has minimum bond energy?

• A. $ C-H $
• B. $ N-H $
• C. $ O-H $
• D. $ F-H $

Answer 1

Answer: (B)

The bond between H and more electronegative element is more stable ie, its bond energy is maximum. Hence, the order of energy of bond formed between diatomic molecules should be as:
$ FH>OH>NH>CH $
but the bond energy of N-H and C-H bond is comparable and the bond energy of N-H $ (85\approx 110) $ is less than the bond energy of C-H bond $ (90\approx 110) $ .