Which of the following would have a permanent dipole moment ?

1. BF₃

2. SiF₄

3. SF₄

4. XeF₄

In the case of alkali metals, the covalent character decreases in the order

1. MCl > MI > MBr > MF

2. MF > MCl >  MBr > MI 

3. MF > MCl > MI > MBr

4. MI > MBr > MCl > MF

The correct order of the dipole moment of the following molecules is : 

Mark the incorrect order of the bond angle:

1. NH₃ > NF₃

2. NF₃ <  PF₃

3. NH₃ > PH₃

4. NH₃ > H₂O

In which case observed dipole moment is greater than theoretical dipole moment?

1.
2.
3.
4.

A molecule having the maximum dipole moment among the following is -

1. CO₂

2. CH₄

3. NH₃

4. NF₃

Dipole-induced dipole interactions are present in which of the following pairs?

1. H₂O and alcohol                       

2. Cl₂ and CCl₄

3. HCl and He atoms                     

4. SiF₄ and He atoms

The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH₃ (1.5 D) is larger than that of NF₃ (0.2 D). This is because:

(1) in NH₃ as well as in NF₃ the atomic dipole and bond dipole are in the same direction
(2) in NH₃ the atomic dipole and bond dipole are in the same direction whereas in NF₃ these are in opposite directions
(3) in NH₃ as well as NF₃ the atomic dipole and bond dipole are in opposite directions
(4) in NH₃ the atomic dipole and bond dipole are in the opposite directions whereas in NF₃ these are in the same directions

Molecule having non-polar as well as polar bonds but the molecule as a whole is polar:

(a) $S_2{F}_2<mspace\; width="1em"></mspace>$

(b) ${\mathrm{N}}_2{\mathrm{O}}_4$

(c) ${\mathrm{Si}}_2{\mathrm{H}}_6$                                           

(d) ${\mathrm{I}}_2{\mathrm{Cl}}_6$

Which of the following compound is planar and non-polar?

(1) $Xe<mspace\; width="1em"></mspace>O_4$

(2) $S{f}_4$

(3) $Xe<mspace\; width="1em"></mspace>f_4$

(4) $C{f}_4$