Question

Which of the following has no dipole moment [DCE 2002]
A) C{{O}_{2}} B) S{{O}_{3}} C) {{O}_{3}} D) {{H}_{2}}O

Answer 1

CO2 has no dipole moment as net dipole moment is 0.
Structure of CO2:
O=C=O
Reason:
Oxygen is more electronegative than Carbon therefore, dipole moment is in the outward direction from oxygen atoms and not the dipole moment gets cancelled and net dipole moment is 0.
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