Which of the following is a correct Lewis structure for ozone, O₃?

1.   ?    1
2.   ?    2
3.   ?    3
4.   ?    4
5.   ?    5

What is the bond angle in N₂O?

1.   ?    90^o
2.   ?    107^o
3.   ?    109.5^o
4.   ?    120^o
5.   ?    180^o

Use VSEPR theory to predict the molecular geometry of CS₂.

1.   ?    linear
2.   ?    bent
3.   ?    trigonal-planar
4.   ?    tetrahedral
5.   ?    octahedral

Which one of the following molecules has a dipole moment?

1.   ?    CI₄
2.   ?    PF₅
3.   ?    NCl₃
4.   ?    SO₃
5.   ?    O₂

In molecules, as bond order increases,

1.   ?    both bond length and bond energy increase.
2.   ?    both bond length and bond energy decrease.
3.   ?    bond length increases and bond energy is unchanged.
4.   ?    bond length is unchanged and bond energy increases.
5.   ?    bond length decreases and bond energy increases.

The standard molar enthalpy of formation of ClF₃ is -405 kJ.
1/2 Cl_2(g) + 3/2 F_2(g) → ClF_3(g)
The bond energies of Cl₂ and F₂ are 242 kJ and 155 kJ/mol, respectively. Calculate the energy of an Cl-F bond.

1.   ?    8 kJ/mol
2.   ?    87 kJ/mol
3.   ?    207 kJ/mol
4.   ?    253 kJ/mol
5.   ?    802 kJ/mol

1.   ?    +103 kJ
2.   ?    -103 kJ
3.   ?    -815 kJ
4.   ?    -1465 kJ

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of ICl₃.

1.   ?    electron-pair geometry = trigonal planar; molecular geometry = trigonal planar.
2.   ?    electron-pair geometry = tetrahedral; molecular geometry = trigonal planar.
3.   ?    electron-pair geometry = trigonal bipyramidal; molecular geometry = trigonal planar.
4.   ?    electron-pair geometry = trigonal bipyramidal; molecular geometry = T-shaped

What is the formal charge on each atom in CO?

1.   ?    C = -1, O = +1
2.   ?    C = 0, O = 0
3.   ?    C = +1, O = -1
4.   ?    C = +2, O = -2

What is the bond order for a nitrogen-oxygen bond in a nitrate ion, NO₃^-?

1.   ?    1
2.   ?    4/3
3.   ?    3/2
4.   ?    2