TS EAMCET · Chemistry · Chemical Bonding and Molecular Structure
Which is the correct order of dipole moments of \(\mathrm{BF}_3, \mathrm{NF}_3\) and \(\mathrm{NH}_3\) ?
- A \(\mathrm{NH}_3>\mathrm{BF}_3>\mathrm{NF}_3\)
- B \(\mathrm{BF}_3>\mathrm{NF}_3>\mathrm{NH}_3\)
- C \(\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{BF}_3\)
- D \(\mathrm{NF}_3>\mathrm{NH}_3>\mathrm{BF}_3\)
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 \(\mathrm{N}-\mathrm{H}\)…
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