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(CHEM131)[2009](f)final~ch_yrx^_10041.pdf
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Student Name: Student ID:
CHEM 131 Inorganic Chemistry I (Final Exam sample paper)
Part I: Multiple Choices (2 points each, 50 points in total)

1. For a cube, the number of C6, C4, and C3 rotational axes is
(a) 1, 3, and 4, respectively (b) 0, 2, and 4, respectively (c) 0, 3, and 4, respectively
2. The CO diatomic molecule contains infinite number of
(a) v (b) i (c) h (d) C2

3.
Identify the wrong lablel(s) in the following list used for representations of point groups. C1000, C10h, D100h, D2v, Ci, I, Oi, Td

4.
The Fe2(CO)9 molecule shown does not posses what element of symmetry?

(a) i (b) (c) S3 (d) C2


5.
A molecule having a point group of D4h contains all the symmetry elements of a molecule having a point group of

(a) D4d (b) D2d (c) D3h (d) none of the above


6.
How many mirror planes of symmetry are there in an icosahedron?

(a)6 (b)9 (c)12 (d)15 (e)18


7.
Give the symmetry label for the molecular orbital associated with a trigonal planar structure (you are given a character table for D3h).

(a)
A1' (b) A1"

(c)
A2' (d) A2"



8.
Identify the stronger acid?




3+ 3+
H2Se vs. H2S [Al(H2O)6]vs. [Fe(H2O)6]

9. Which one in the following is the least stable?
3+ 3-
(a) [Al(H2O)6](b) [AlF6](c) Mo(H2O)6 (d) Mo(CO)6

10. Predict which way the following reactions will go (left or right)
3+ 3+ 3+ 3+
(a)
[AlF6]+ Ga(CN)6]. [GaF6]+ Al(CN)6]

(a)
W(CO)5(PMe3) + NMe3 . W(CO)5(NMe3) + PMe3



11. Select the strongest base toward proton.
(a) NH3 (b) NHMe2 (c) PH3 (d) PMe3

12. Which of the following reactions belong to the acid-base reactions?
(a)
H+OH . H2O.

(b)
PF3+F2 . PF5.

(c)
SiF4 + 2NaF . Na2[SiF6].

(d)
Mo+6CO . Mo(CO)6.



13. The concept of hard/soft acids and bases is useful in
(a)
determining the strengths of Lewis bases.

(b)
determining the strengths of Lewis acids.

(c)
understanding the stabilities of salts.

(d)
understanding the binding properties of Lewis acids/bases.



14. Select the weakest Bronsted acid.
(a) H3PO4 (b) H2CO3 (c) H3BO3 (d) H2SeO4

15. In the coordination compound (NEt4)2[Fe(en)(CN)4], where en = ethylenediamine and Et = ethyl, the coordination number (C.N.) and oxidation number (O.N.) of Fe, respectively are: (The atomic number of Fe is 26)
(a)
C.N.=6; O.N.=4 (b) C.N.=6; O.N.=2 (c) C.N.=5; O.N.=2

(d)
C.N.=5; O.N.=4 (e) C.N.=4; O.N.=3



16. In [Cr(en)2Cl2]Br2, where en = ethylenediamine, how many 3d electrons does the chromium ion have? The atomic number of Cr is 24.
(a) 3 (b)4 (c)5 (d)6 (e)2
O

17. Which of the following complexes are chiral? C
(a) cis-[Fe(en)2Br2]+ (b) Pt(en)ClBr (a square planar structure) O
CH2
CH2
(c) Cr(NH3)4ClBr (d) fac-Cr(NH3)3(Br)(Cl)(F) C O
N

CH2 Co
18. Assign or configuration for the complex shown on the right. CH2AcO NH
O
CH2
19. Which of the following ligan