The following questions refer to the structures shown in Fig
     The following questions refer to the structures shown in Figure 4.5.  Which of the structures is an unlikely covalently bonded molecule?  A  B  C  D  E 
  
  Solution
Answer: C
All other structures are having the covalent bonds.
The sharing of electrons pairs between two atoms is known as covalent bond. Sharing of electron pairs are nor observed in the option C

