Which of the following has non-zero dipole moment ?

Question

Which of the following has non-zero dipole moment ? (A) PCl3Br2 (B) PBr3Cl2 (C) PCl5 (D) CO2

Tardigrade Admin · Accepted Answer

This is an asymmetric structure.
Structure of (b) is symmetrical. Here the resultant dipole moments of bonds of 2 'Br' atoms with 'P' get cancelled with the dipole moment of another P - Br bond and the dipole moments of both P - Cl bonds also gets cancelled.

Q. Which of the following has non-zero dipole moment ?

$PC l_{3} B r_{2}$

$PB r_{3} C l_{2}$

$PC l_{5}$

$C O_{2}$

This is an asymmetric structure.
Structure of (b) is symmetrical. Here the resultant dipole moments of bonds of 2 'Br' atoms with 'P' get cancelled with the dipole moment of another P - Br bond and the dipole moments of both P - Cl bonds also gets cancelled.

Q. Which of the following has non-zero dipole moment ?

PCl3​Br2​

PBr3​Cl2​

PCl5​

CO2​

This is an asymmetric structure. Structure of (b) is symmetrical. Here the resultant dipole moments of bonds of 2 'Br' atoms with 'P' get cancelled with the dipole moment of another P - Br bond and the dipole moments of both P - Cl bonds also gets cancelled.

$PC l_{3} B r_{2}$

$PB r_{3} C l_{2}$

$PC l_{5}$

$C O_{2}$

This is an asymmetric structure.
Structure of (b) is symmetrical. Here the resultant dipole moments of bonds of 2 'Br' atoms with 'P' get cancelled with the dipole moment of another P - Br bond and the dipole moments of both P - Cl bonds also gets cancelled.