ExamBro
ExamBro
TS EAMCET · Chemistry · Chemical Bonding and Molecular Structure

Which is the correct order of dipole moments of \(\mathrm{BF}_3, \mathrm{NF}_3\) and \(\mathrm{NH}_3\) ?

  1. A \(\mathrm{NH}_3>\mathrm{BF}_3>\mathrm{NF}_3\)
  2. B \(\mathrm{BF}_3>\mathrm{NF}_3>\mathrm{NH}_3\)
  3. C \(\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{BF}_3\)
  4. D \(\mathrm{NF}_3>\mathrm{NH}_3>\mathrm{BF}_3\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{BF}_3\)

Step-by-step Solution

Detailed explanation

\[ \text { } \mathrm{BF}_3 \text { has zero dipole moment. } \] In \(\mathrm{NH}_3, \mathrm{~N}\) is more electronegative than \(\mathrm{H}\). So, nitrogen pulls the electron from \(\mathrm{H}\) towards itself and the direction of moment is same due to \(\mathrm{N}-\mathrm{H}\)…