question_answer

The increasing dipole moments of the following compounds is

A) I < III < IV < II        

B) II = IV < III < I

C) II = I < IV < III         

D)  III < I < II < IV

Correct Answer: B

Solution :

(II) and (IV) are symmetrical and thus, resultant dipole moment is zero. In (I) bond moment are towards the same direction but in (III) there is net dipole at the \[{{C}_{2}}\] position. Thus, the dipole moment of (I) is maximum. Thus, the correct order is II = IV < m < I