Question

Which of the following molecules has the maximum dipole
moment ? [2014]
(a) CO₂ (b) CH₄
(c) NH₃ (d) NF₃

Answer 1

(d) NF₃ has maximum dipole moment .

Explanation:

d is the correct option because both CO₂ and CH₄ have 0 dipoloe moment .

A molecule like CO₂ may be composed of two dipoles, but it has no dipole moment. This is because the charge is equally distributed among the entire molecule. When molecules have an even charge distribution and no dipole moment, then they are non polar molecules.

NF₃ has more dipole moment than NH₃ because of F atoms' high electron negativity .

Answer 2

(c) NH₃ out of the following molecules has the maximum dipole moment.

• As the dipole moment of CO and CH is Zero.
• And the dipole moment of NH₃ is more than that of NF₃.
• In NH₃ the H is less electronegativity than N,therefore the dipole moment of H (3) present in NH₃ towards the N which make it having maximum dipole moment.