Question

Which of the following bonds is the strongest? H-H N-N C-C C=O

Answer 1

Double bond is steonger than single bond, so C=O is the strongest

Answer 2

Answer: The correct answer is $C=O$

Explanation:

Determination of strength of bond is determined on the basis of Bond order.

Bond order is defined as the number of chemical bonds present between a pair of atoms. More is the bond order, stronger is the bond and vice-versa.

For the given options:

1. H-H: Bond order of this molecule is 1.

2. N-N: Bond order of this molecule is 1.

3. C-C: Bond order of this molecule is 1.

4. C=O: Bond order of this molecule is 2.

As, the bond order of C=O molecule is the highest. Hence, bond between them is the strongest.

Therefore, the correct answer is $C=O$