question_answer

Which of the following does not have a co-ordinate bond?

A)  \[S{{O}_{2}}\]                                  

B)  \[HN{{O}_{3}}\]

C)  \[{{H}_{2}}S{{O}_{3}}\]                                

D)  \[HN{{O}_{2}}\]

Correct Answer: C

Solution :

                 \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{3}}}\]has the structure       \[\text{HN}{{\text{O}}_{\text{2}}}\]is a tautomeric mixture of its nitrile and     nitro forms.                                   Hence, it contains co-ordinate bond.