Chemical Bonding Set 9

Results

#1. An ionic compound A+ B– is most likely to be formed when

The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy and electron affinity of B are high

Both the ionization energy of A and electron affinity of B are low

#2. The number of bonds in nitrogen molecules

one s and one p

one s and two p

three sigma only

two s and one p

#3. Which of the following statements is not correct regarding bonding molecular orbitals?

bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

bonding molecular orbitals have low electron density between the two nuclei

every electron in the bonding molecular orbitals contributes to the attraction between atoms

bonding molecular orbitals are formed when the electron waves undergo constructive interference

#4. Which of the following molecules has zero dipole moment?

NH3

CHCl3

H2O

BF3

#5. Which of the hydrogen halides has the highest percentage of ionic character

HBr

HCl

#6. Which of the following molecules has unpaired electrons in anti–bonding molecular orbitals

#7. Which of the following involve ionic bonding only?

Li3N

NaCl

NCl3

#8. Which of the following involve covalent bonding only?

KCl

CH4

MgCl2

#9. Which of the following molecules has a net dipole moment?

CO2

CS2

SO2

CCl4

#10. H2S has a net dipole moment while BeF2 has zero dipole moment, because

H2S molecule is linear while BeF2 is angular

H2S molecule is angular, while BeF2 molecule is linear

Fluorine has more electronegativity than S

Be is more electronegative than S

Finish