question_answer

Dipole moment is shown by:

A)  2-methyl propane

B)  trans-butene-2

C)  cis-butene-2

D)  carbon tetrachloride

Correct Answer: C

Solution :

                 2-methyl propane \[-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] The net dipole moment cannot be calculated trans-butene-2 The dipole moment of trans butene-2 is zero because dipole moment is vector sum of all dipoles and that is zero. cis-butene-2 The net dipole moment is not zero. Carbon tetrachloride. It has regular geometry and therefore, its net dipole moment is zero.