Which one of the following statements regarding molecular orbital theory is corr
ID: 906904 • Letter: W
Question
Which one of the following statements regarding molecular orbital theory is correct?
A. Two bonding orbitals and two antibonding orbitals are formed from one atomic orbital on each of two atoms.
B. p atomic orbitals cannot form molecular orbitals.
C. A 2s orbital has a higher energy than a 2s* orbital.
D. Only À molecular orbitals can be formed from p atomic orbitals.
E. s atomic orbitals can only form sigma molecular orbitals.
Oxygen has two common molecular anions: peroxide (O22–) and superoxide (O2–). Use the MO energy level diagram below to identify which one of the following statements is not correct.
A.
The bond order of the peroxide is 1.
B.
The superoxide has a shorter bond than the peroxide.
C.
Like O2, the peroxide is paramagnetic.
D.
The superoxide has a stronger bond than the peroxide.
E.
Oxygen, O2, has a stronger bond than either of these oxides.
Which compound has the weakest ion-ion attraction?
A. KBr
B. LiF
C. KF
D. LiBr
E. KI
What intermolecular forces are present in liquid NF3?The electronegativity of N = 3.0; of F = 4.0.
A. Dispersion forces only.
B. Dipole-dipole forces only.
C. Dipole-dipole and dispersion forces only.
D. Hydrogen bonds, dipole-dipole, and dispersion forces.
E. Dipole-dipole and hydrogen-bond forces only.
Polarizability refers to __________
A. the ease with which the electron cloud of an atom or molecule can be distorted.
B. the magnitude of the dipole moment of a molecule.
C. the ease with which a hydrogen bond can form.
D. the perturbation in electron density because of hydrogen bonding.
E. the ability to transmit polarized light.
Dispersion forces are due to __________
A. permanent dipoles.
B. temporary dipoles.
C. hydrogen bonding.
D. ionic interactions.
E. protons.
Which of the following polar compounds is likely to have the highest boiling point?
A. CH3OCH3
B. CH3CH2OH
C. (CH3)2CO
D. H2CO
E. CO
A. Two bonding orbitals and two antibonding orbitals are formed from one atomic orbital on each of two atoms.
B. p atomic orbitals cannot form molecular orbitals.
C. A 2s orbital has a higher energy than a 2s* orbital.
D. Only À molecular orbitals can be formed from p atomic orbitals.
E. s atomic orbitals can only form sigma molecular orbitals.
Explanation / Answer
1)A,C,E
2)B,C
3)B
4)B
5)A
6)B
7)B
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