Which of the following should be the longest bond ?

Which of the following has the longest C - O bond ?

Which of the following has the longest C-O bond length? (C-O bond length of CO is 1.128 A )

Which of the following is the longest wave?

Which of the following is the longest wave?

Which of the following bones are the longest in the body ?.

Which of the following molecules has the longest nitrogen-nitrogen bond?

Bond order is associated with strength of bond and bond length. Higher the bond order smaller will be bond length and stronger will be bond. Answer the following questions based on above passage: Which of the following species has longest O-O bond ?