1. 11. In which orbital below would an electron (on average) be furthest away from the nucleus? A.
1s B. 4f C. 3s D. 3d E. 2p 12. In the Lewis structure for CIFs, the number of lone pairs of
electrons around the central atom is a. b. 1 28e d. 3 e. 4 13. Which of the following statements is
INCORRECT? A. lonic bonding results from the complete transfer of electrons from one atom to
another B. A molecule with very polar bonds cannot be non-polar.X C. Linear molecules can
have a net dipole moment D. Dipole moments are the result of unequal electron distribution in a
molecule E. The electrons in a polar bond are found nearer to the more electronegative element.
14. Arrange oxygen, sulfur, calcium, rubidium and potass sium in order of decreasing
electronegativity. o>S> Ca> Rb > K O> S>Rb>K> Ca e. None of the above orders is correct. 15.
How many of the following molecules or ions are linear? NH3 HCN CO2 NO2 d. 4
Solution
11. B 4f orbital will be farthest away from the central nucleus
12. answer C 2 loan pair of electron around the central atom,
as Cl has 7 electrons out of which 3 are occupied by 3 fluorines
Hence left out are 4 electrons
Thus 2 lone pairs around the central atom
13. answer C as the statement  Linear molecules cannot have a net dipole moment. is wrong
14. Answer B is correct order of decreasing the electronegativity
15. Answer C 2 molecules are linear
HCN is a linear molecule, Co2 is linear