Which of the following would have a permanent dipole moment ?

(a) BF₃

(b) SiF₄

(c) SF₄

(d) XeF₄

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

(a) MCl > MI > MBr > MF

(b) MF > MCl >  MBr > MI 

(c)MF > MCl > MI > MBr

(d) MI > MBr > MCl > MF

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

(1) I >  II > III

(2) I = II = III

(3) III > II > I

(4) I > III > II

which is the incorrect about bond angles ?

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.

Which of the following molecules has the maximum dipole moment?

(a) CO₂

(b) CH₄

(c) NH₃

(d) NF₃

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

(a) H₂O and alcohol                        (b) Cl₂ and CCl₄

(c) HCl and He atoms                      (d) SiF₄ and He atoms

Which of the following is a polar molecule?

(a) BF₃

(b) SF₄

(c) SiF₄

(d) XeF₄

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

(a) $S_2{F}_2$

(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 species has polar and non-polar bonds but molecule as a whole is non-polar?

(a) ${\mathrm{S}}_2{\mathrm{O}}_3^{2-}$                                              (b) $(\mathrm{SCN}{)}_2$

(c) ${\mathrm{Be}}_2{\mathrm{Cl}}_4$                                              (d) ${\mathrm{Si}}_2{\mathrm{H}}_6$