Which of the following is the correct order o | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The dipole moment $(\mu)$ depends on the polarity of bonds and the geometry of the molecule.$1$. $BF_{3}$ is a planar molecule with a symmetric st

Vedclass · Accepted Answer

$BF_{3} < NF_{3} < NH_{3} < H_{2}O$

Vedclass · Answer

(A) The dipole moment $(\mu)$ depends on the polarity of bonds and the geometry of the molecule.$1$. $BF_{3}$ is a planar molecule with a symmetric structure,so its net dipole moment is $\mu = 0$.$2$. $NF_{3}$ has a pyramidal structure with a lone pair. The bond dipoles of $N-F$ bonds are in the opposite direction to the lone pair dipole,resulting in a small net dipole moment $(\mu \approx 0.24 \ D)$.$3$. $NH_{3}$ has a pyramidal structure where the bond dipoles of $N-H$ bonds and the lone pair dipole are in the same direction,resulting in a higher net dipole moment $(\mu \approx 1.47 \ D)$.$4$. $H_{2}O$ has a bent structure with two $O-H$ bonds and two lone pairs,resulting in a high net dipole moment $(\mu \approx 1.85 \ D)$.Therefore,the correct order is $BF_{3} < NF_{3} < NH_{3} < H_{2}O$.

Which of the following is the correct order of dipole moment?

Similar Questions

The molecular size of $ICl$ and $Br_2$ is approximately the same,but the $b.p.$ of $ICl$ is about $40 \ ^oC$ higher than that of $Br_2$. This is because:

State the magnitude of dipole-dipole forces and the value of interaction energy with examples.

Which of the following is a non-polar solvent?

Match the following molecules in List-$I$ with their respective dipole moments in List-$II$:
| List-$I$ (Molecules) | List-$II$ (Dipole moment $\mu$,$D$) |
| :--- | :--- |
| $A. \ H_2O$ | $I. \ 0$ |
| $B. \ BF_3$ | $II. \ 0.23$ |
| $C. \ NH_3$ | $III. \ 1.47$ |
| $D. \ NF_3$ | $IV. \ 1.85$ |

The observed dipole moment of $HCl$ is $1.303 \ D$. This indicates that $HCl$ has $17 \%$ ionic and $83 \%$ covalent character. The bond length of $HCl$ is $1.26 \ \mathring{A}$ and the charges on $H$ and $Cl$ ions are $+e$ and $-e$. Calculate the theoretical dipole moment in $D$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module