MCQs on Dipole Moment
1. Molecules with odd electron bond are
(a) paramagnetic
(b) unstable
(c) forms dimers at low temperature
(d) all are correct
Answer:::: (d)
2. In a crystal, atoms are located at the positions of
(a) maximum potential energy
(b) minimum potential energy
(c) zero potential energy
(d) indefinite potential energy
Answer:::: (b)
3. If the water molecule is linear
(a) it would have a very high boiling point
(b) it would be highly reactive
(c) its dipole moment would be zero
(d) it would be highly ionic
Answer:::: (c)
4. The percentage of ionic character of the bond between two atoms is calculated from the difference between their
(a) ionic radii
(b) electronegativities
(c) electron affinities
(d) ionisation energies
Answer:::: (b)
5. Which of the following is not correct for dipole moment?
(a) lone pair of electrons present on the central atom can give rise to the dipole moment
(b) the dipole moment is a vector quantity
(c) CO2 molecule has no dipole moment since C-O bonds are nonpolar
(d) the difference in electronegativities of combining atoms can lead to the dipole moment
Answer:::: (c)
6. For two ionic solids CaO and KI, identify the wrong statement among the following
(a) the lattice energy of CaO is much larger than KI
(b) KI is soluble in benzene
(c) CaO has a higher melting point
(d) KI has a lower melting point
Answer:::: (b)
7. A diatomic molecule has a dipole moment of 1.2D. If its bond distance is 1.0Ao, what fraction of electric charge “e” exists on each atom?
(a) 12% of e
(b) 18% of e
(c) 25% of e
(d) 30% of e
Answer:::: (c)
8. Find the species with a maximum dipole among the following
(a) NF3
(b) CO2
(c) NH3
(d) CH4
Answer:::: (c)
9. In conductors, opposite charges are separated by
(a) dielectric
(b) insulator
(c) microscopic distances
(d) large distances
Answer:::: (b)
10. Electric susceptibility is inversely proportional to
(a) permittivity
(b) polarization vector
(c) magnetic field intensity
(d) permeability
Answer:::: (a)
