faculty applied sciences
TRANSCRIPT
FIHITIIBIH Ul'lIVERSlTY
OF SCIENCE nnD TECHNOLOGY
FACULTY OF HEALTH AND APPLIED SCIENCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION: BACHELOR OF SCIENCE
QUALIFICATION CODE: O7BOSC LEVEL: 7
COURSE CODE: |CH602$ COURSE NAME: INORGANIC CHEMISTRY
SESSION: JANUARY 2018 PAPER: THEORY
DURATION: 3 HOURS MARKS: 100
SUPPLEMENTARY/SECOND OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER(S) DR. EUODIA HESS
MODERATOR:P RO F HABAU KA KWAAM BWA
INSTRUCTIONS
Answer ALL the questions.
Write clearly and neatly.
Number the answers clearly
All written work must be done in blue or black ink and sketches can
be done in pencil
PP‘F’!‘5. No books, notes and other additional aids are allowed
THIS QUESTION PAPER CONSISTS 0F 7 PAGES (Including this front page, list of useful constants
and Periodic Table)
SECTION A
QUESTION 1:
1.1 What are the shapes of s, p, and d orbitals respectively?
1.2 How many orbitals are in each of the following?
ls; 4p; 4d
1.3 What is the maximum number of orbitals with:
n=4|=1
n=2 |=2
n=3 |=2
n = 5 | = 1 m/ = -1
1.4 Which orbitals cannot exist?
2p 3p 4d 3f 65 2d
1.5 Write a set of quantum numbers for a 4f orbital.
1.6 Describe the electrons defined by the following quantum numbers:
n l ml
3 0 0
2 1 1
4 2 -1
3 3 2
3 1 2
Page 2 of 7
[40]
[20]
(3)
(3)
QUESTION 2: [20]
There are 10 questions and each correct answer carries 2 marks
2.1. What is the electronic geometry for 5 regions of high electron density on a central atom?
A. octahedral
B. square planar
C. tetrahedral
D. trigonal bipyramidal
E. trigonal planar
2.2 What angle(s) are associated with a central atom that has tetrahedral electronic geometry?
A. 1095"
B. 120°
C. 120° and 180°
D. 90° and 120°
E. 90° and 180°
2.3 Which shape and bond angle are predicted by VESPR theory for H20?
A. linear, 180°
B. bent, 120°
C. planar, less than 120°
D. bent, less than 109.5°
E. bent, 1095"
2.4 A molecule consisting of a central atom surrounded by two bonding pairs and lone pair of
Electrons will be ?
A. bent
B. tetrahedral
C. linear
D. trigonal planar
E. trigonal pyramidal
Page 3 of 7
2.5 What would be the shape of BFg?
A. tetrahedral
B. trigonal pyramidal
C. square planar
D. trigonal planar
E. see—saw
2.6 What is the shape of PFs?
A. trigonal pyramidal
B. trigonal planar
C. trigonal bipyramidal
D. octahedral
E. trigonal bipyramidal
2.7 What is the shape of N03‘?
A. octahedral
B. trigonal pyramidal
C. trigonal planar
D. linear
E. tetrahedral
2.8 What is the shape of NH4+ ?
A. linear
B. bent
C. trigonal planar
D. octahedral
E. tetrahedral
2.9 The SFs' ion has a square pyramid structure. The hybridization of the orbitals in sulfur is:
A. dsp3
B. sp
C. dzsp3
D. sp3
E. sp2
Page 4 of 7
2.10 In which of the following pairs are the two items NOT properly related?
A. sp3 109°
B. trigonal planar 120°
C. octahedral dzsp3
D. sp 180°
E. square planar dzsp3
SECTION B: [60]
QUESTION 3 [40]
3.1 List the type of intermolecular forces that exist between molecules (or basic units) in each
of the following species: (10)
a) Benzene
b) CH3CI
C) PF3
d) NaCl
e) C52
3.2 Indicate whether or not each of the following species are capable of hydrogen-bonding
among themselves. (10)
a) Csz
b) Hl
c) KF
d) BeHz
e) CH3COOH
3.3 Draw the phase diagram of water and label the regions accordingly? (4)
3.4 When silver crystallizes, it forms face-centered cubic cells. The unit cell edge length is
409 pm. Calculate the density of silver. (10)
3.5 List the different types of crystals and give an example of each. (6)
Page 5 of 7
QUESTION 4 [20]
4.1 Write the systematic names of the following coordination compounds: (8)
a) Ni(CO)4
b) NaAuF4
C) K3[Fe(CN)5]
cl) [Cr(en)3]C|3
4.2 What are the geometries of of the following two complexes: (2)
a) [AICl4]‘
b) [Ag(NH3)2]+
4.3 Write the formula of each of the following coordination compounds: (10)
a) Tetraammineplatinum(l|) chloride
b) Sodium hexacyanoferrate(lll)
c) Tris(ethy|enediamine)platinum(|V) sulfate
d) Diamminesilver(|) nitrate
e) Potassium diaquadioxalatocobaltate(Ill)
END OF EXAMINATION
USEFUL CONSTANTS:
Gas constant, R: 8.3145] 'mol'l' K‘1= 0.083145 dm3'bar'mol'1'K'1= 0.08206 L atm mol‘l' K'1
1Pa-m3=1kPa.L =1N'm =1J
1 atm = 101 325 Pa = 760 mmHg = 760 torr
Avogadro’s Number, NA = 6.022 x 1023 mol'1
Planck’s constant, h = 6.626 x 10'34 J5
Speed of light, c = 2.998 x 108 m5'1
Page 6 of 7
PERIODICTABLEOFTHEELEMENTS
1
18
1
2
H
He
1.00794
2
13
14
‘5
16
'7
4.00260
Page 7 of 7
3
4
5
6
7
8
9
10
Li
Be
B
C
N
0
F
Ne
6.941
9.01218
10.81
12.011
14006715999418.998420.179
11
12
13
14
15
16
17
18
Na
Mg
Al
Si
P
S
Cl
Ar
22.989824.305
3
4
5
6
7
8
9
10
ll
12
26.981528.085530.9738
32.06
35.453
39.948
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co.
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
39.0983
40.08
44.9559
47.88
50.941551.996
54.938055.847
58.9332
58.69
63.546
6538
69.72
72.59
74.9216
78.96
79.904
83.8
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
RbSrYZrNbMoTcRuRthAngInSnSbTeIXe 85.4678
87.62
88.9059
91.22
92.9064
95.94
(98)
10107102906106.42107.868112.41114.82
118.69
121.75
127.6
126.9
131.29
55
56
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
Cs
Ba
Lu
Hf
Ta
W
Re
08
Ir
Pt
Au
Hg
T1
Pb
Bi
Po
At
Rn
132.905
137.33
174.967178.49180.948
183.85
186207
1902
192.22
195.08
196.967200.59
204.383
2072
208.908
(209)
(210)
(222)
87
88
103
104
105
106
107
108
109
110
111
112
114
116
118
Fr
Ra
Lr
Rf
Db
Sg
Bh
HS
Mt
Uun
Uuu
Uub
Uuq
Uuh
Uuo
(223)
226.025
(260)
(261)
(262)
(263)
(264)
(265)
(268)
(269)
(272)
(269)
Lanthnnidec:
S7
58
59
60
61
62
63
64
65
66
67
68
69
70
La
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
138.906
1401214090814424
(145)
15036
151.96
15725
158.925
16250161930167.26
166.934
173.04
Actinides:
89
90
91
92
93
94
95
96
97
98
99
100
101
102
Ac
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
227.028232.038231.036238.029237.048
(244)
(243)
(247)
(247)
(251)
(252)
(257)
(258)
(259)