Name: 
 

Practice Final A



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The ground-state electron configuration of Fe2+ ion is 1s2 2s2 2p6 3s2 3p6 3d6.  Therefore Fe2+ is
A)
paramagnetic with four upaired electrons.
B)
paramagnetic with one upaired electron.
C)
paramagnetic with two upaired electrons.
D)
diamagnetic.
 

 2. 

Use bond energies listed in Table 9.3 of your text to determine DHrxn for the reaction shown below:

CH3CH2OH (g)  +  HCl (g)    ®   CH3CH2 Cl (g)  +  H2O (g)
A)
12 kJ
B)
-12 kJ
C)
1549 kJ
D)
-1549 kJ
 

 3. 

According to valence bond theory, which kind of orbitals overlap to form the P-Cl bond in PCl5?
A)
P (sp3d)-Cl (s)
B)
P (sp3)-Cl (p)
C)
P (sp3d)-Cl (p)
D)
P (sp3)-Cl (s)
 

 4. 

If 20.0 g of urea [CO(NH2)2] is dissolved in 25.0 g of water, what is the freezing point of the solution? (Kf = 1.86 °C/m)
A)
–24.7 °C
B)
–3.72 °C
C)
–2.47 °C
D)
–1.40 °C
 

 5. 

Which of the following best represents the formal charges on the structure shown below:

mc005-1.jpg
A)
+1 for H, –2 for each oxygen, +5 for N
B)
+1 for N, –1 for oxygen (c), 0 for all other atoms
C)
0 for all atoms
D)
+1 for N and H, –1 for oxygen (a) and (c), 0 for oxygen (b)
 

 6. 

Which of the following correctly ranks the following in order of decreasing atomic radius?
A)
Ba > Rb > K > Ca
B)
Rb > Ba > Ca > K
C)
Rb > Ba > K > Ca
D)
Ba > Rb > Ca > K
 

 7. 

What is the molecular shape for ClF3 as predicted by the VSEPR model?
A)
T-shaped
B)
trigonal planar
C)
trigonal pyramidal
D)
see-saw
 

 8. 

Which of the following compounds is polar?
A)
CO2
B)
BeCl2
C)
SF2
D)
KrF2
 

 9. 

Which is the best Lewis structure for CH3SOCH3?

mc009-1.jpg
A)
a)
B)
b)
C)
c)
D)
d)
 

 10. 

Elements with _________ first ionization energies and _________electron affinities form cations.
A)
high, positive or slightly negative
B)
high, very negative
C)
low, positive or slightly negative
D)
low, very negative
 

 11. 

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?
A)
T-shaped
B)
trigonal pyramidal
C)
trigonal planar
D)
tetrahedral
 

 12. 

Which of the following compounds displays the most ionic character it its bonds?
A)
H2O
B)
NO2
C)
HF
D)
CO2
 

 13. 

What is the hybridization about O in CH3OH?
A)
sp3
B)
sp2
C)
sp3d
D)
sp
 

 14. 

Which ground state electron configuration is INCORRECT?
A)
Cr: [Ar] 3d6
B)
Zn: [Ar] 3d10 4s2
C)
Ca: [Ar] 4s2
D)
Kr: [Ar] 3d10 4s2 4p6
 

 15. 

What is the approximate bond angle in AsCl3?
A)
180
B)
109
C)
120
D)
90
 

 16. 

What is the molecular shape of NOCl as predicted by the VSEPR theory?
A)
trigonal planar
B)
linear
C)
tetrahedral
D)
bent
 

 17. 

Which of the following correctly ranks the following in order of decreasing 1st ionization energy?
A)
Na > Sr > O > Cl
B)
Cl > O > Sr > Na
C)
O > Cl > Na > Sr
D)
Sr > Na > Cl > O
 

 18. 

In the following Lewis structure for ClO3F, chlorine has a formal charge of ______ and an oxidation number of _____.

mc018-1.jpg
A)
1, –1
B)
1, 7
C)
7, –1
D)
1, 1
 

 19. 

The bond energy for the diatomic molecule XY is greater than that of VW.  Which of the following statements is accurate?
A)
The XY bond length is shorter than the VW bond.
B)
The atomic radius of X must be greater than that of V.
C)
The VW bond is more polar than the XY bond.
D)
The electronegativity difference between X and Y is greater than tht of V and W.
 

 20. 

Which set of compounds is arranged in order of increasing lattice energy?
A)
CsI < NaCl < MgS
B)
NaCl < CsI < MgS
C)
CsI < MgS < NaCl
D)
MgS < NaCl < CsI
 



 
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