1.
Given that,
X2O3 (s)    +    CO (g)    →    2 XO (s)    +    CO2 (g)   ;        ΔG º   = – 2.9 kJ
X (s)    +    CO2 (g)    →    XO (s)    +    CO (g)           ;         ΔG º   = +11.3 kJ
then ΔG º for the reaction,
X2O3 (s)    +    3 CO (g)    →    2 X (s)    +    3 CO2 (g)
will be:
A.
– 25.5 kJ
B.
– 14.2 kJ
C.
–   8.4 kJ
D.
+   8.4 kJ    
E.
– 19.7 kJ


2.
How many minutes are required to form 3.02 g of Ag by electrolysis
of a solution of Ag + ions with a current of 0.500 amperes?
A.
9.9
B.
50
C.
40
D.
90
E.
540


3.
At 25 ºC the cell
      Pt  H2(1 atm) , H +(1 M)   Ag + (saturated AgCl)  Ag
has a potential   ε   =   + 0.509 V. Given that,
      Ag +     +      e –     →    Ag       εº   =   + 0.799 V
calculate the solubility product, Ksp, for AgCl at 25 ºC.
A.
1.3 x 10 –5
B.
7.9 x 10 –4
C.
2.8 x 10 –16
D.
5.3 x 10 –8
E.
1.6 x 10 –10


4.
In which one of the following reactions is X a positron?
A.
B.
C.
D.
E.


5.
Calculate the energy released in MeV units by the reaction
      
(nuclide masses in amu: = 2.01410, = 4.00260, = 6.01513)
A.
0.024
B.
22.4
C.
27.3
D.
93
E.
400


6.
Which of the following may exhibit both geometric and optical isomerism?
A.
[ Co (en)3 ] 3+
B.
[Co (NH3)4 Cl2 ] +
C.
[Co (en)2 Cl2 ] +
D.
[ Pt (NH3)2 Cl2 ]
E.
[ Pt (NH3)3 Cl ] +


7.
A sample of has a count rate of 300 disintegrations per minute. Calculate
the number of atoms in the sample.
(half-life = 5.2 years. Use 1 year =365 days)
A.
7.08 x 10 10
B.
8.20 x 10 8
C.
1.56 x 10 3
D.
1.18 x 10 9
E.
2.25 x 10 3


8.
A reaction run at 60 ºC has a ΔH = 10.0 kJ and a ΔS = 170 J K –1.
What is the maximum work in kJ that can be gained by the
surroundings from this reaction at 60 ºC?
A.
   46.6        
B.
   20.2        
C.
– 20.2
D.
– 10.2
E.
  10.2
       


9.
Given the following standard half-cell reduction potentials,
   Cr 3+     +     3 e –     →     Cr   ;    εº   =   – 0.440 V
   Fe 2+     +     2 e –     →     Fe   ;    εº   =   – 0.403 V
calculate the equilibrium constant at 25 ºC for the reaction that
takes place in the cell,
      Cr  Cr 3+ (aq)      Fe 2+ (aq)  Fe
A.
1.76   x 10 –4
B.
5.68   x 10 3
C.
4.11   x 10 –34
D.
8.44   x 10 –6
E.
2.43   x 10 33


10.
Which of the following names for the compound

         [ Mn (PH3)2 (CO)3 Br ]
   
is correct? (The ligand PH3 is called phosphine)   
 
A.
diphosphinetricarbonylmanganese(I) bromide
B.
bromotricarbonyldiphosphinemanganese(I)                                                                                                                          
C.
bromotricarbonyldiphosphinemanganate(I)
D.
manganese(I) diphosphinetricarbonylbromide
E.
bromotricarbonyldiphosphinemanganese(III)
 


11.
For a reaction at equilibrium ΔH is 212 kJ and ΔS is 187 J K –1.
The temperature in ºC at which this equilibrium occurs is:
A.
1134
B.
882
C.
609
D.
861
E.
396    


12.
Calculate the voltage associated with the cell
      Co  Co 2+ (0.00500 M)      Al 3+ (0.250 M)  Al
at 25 ºC given the following standard half-cell reduction potentials.
Al 3+      +     3 e –     →     Al              εº   =   – 1.660 V      
Co 2+     +     2 e –     →    Co             εº   =   – 0.277 V
A.
1.18 V
B.
– 1.72 V
C.
– 1.33 V
D.
– 1.44 V
E.
– 1.48 V


13.
[Co(CN)6] 4– is a low spin complex anion. The number of unpaired
electrons in it is:
A.
1
B.
2
C.
3
D.
4
E.
5


14.
Which of the following statements is not correct?
A.
A protein molecule is a very long chain of amino acids.
B.
Each hemoglobin molecule contains four Fe 2+ ions.
C.
Each hemoglobin molecule consists of four myoglobin like units.
D.
The coordination number of Fe 2+ in the heme complex is four.
E.
The coordination number of Fe 2+ in hemoglobin is four.


15.
Which of the following is necessary to ensure that a reaction is spontaneous?
A.
ΔH < 0
B.
ΔS > 0
C.
ΔG < 0
D.
ΔS < 0
E.
ΔH > 0


16.
For a reaction at 200 ºC, ΔG = – 56.9 kJ and ΔH = – 1.7 kJ. What is ΔSuniv
in J K –1
A.
285
B.
37.2
C.
87.9
D.
–117
E.
120


17.
Which of the following statements is not correct?
A.
Chlorophyll is a porphyrin complex of Mg 2+.
B.
Mn 2+ in a complex ion has the electronic configuration [Ar] 4s 2 3d 3.
C.
The electronic configuration of Cr is [Ar] 4s 1 3d 5.
D.
Zn is mainly used to galvanize steel.
E.
The atomic radii of three transition metal atoms in the same column in the
periodic table follow the order 5d slightly > or ≈ 4d > 3d.


18.
A piece of wood from a sunken ship is found to have a activity of
13 disintegrations min –1 g –1 while a freshly cut piece of wood is
found to have 15 disintegrations min –1 g –1. Approximately, how
long ago was this ship built given that the half-life of is 5760 years?
A.
2900 years
B.
2700 years
C.
1200 years
D.
500    years
E.
less than 100 years


19.
Given the following standard half-cell reduction potentials,    
   Zn 2+     +     2 e –     →    Zn   ;      εº   =   – 0.760 V
   2H +      +     2 e –     →    H2   ;      εº   =      0.000 V
which of the following is true at 25 ºC for the Galvanic cell:          
   Zn  Zn 2+  H +, H2  Pt
A.
Electrons flow from the Zn electrode to the Pt electrode.
B.
Electrons flow from the Pt electrode to the Zn electrode.
C.
Zn (II) is reduced to Zn metal.
D.
H2 is oxidized to H +
E.
The Pt is oxidized.


20.
The half life of is 20 years. If a sample of this nuclide has an initial activity
of 8000 disintegrations min –1 today, what will its activity in disintegrations min –1
be after 80 years?
A.
800
B.
500
C.
1000
D.
2000
E.
4000


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