COVENANT
UNIVERSITY
OMEGA SEMESTER TUTORIAL KIT
(VOL. 2)
PROGRAMME: CHEMISTRY
100 LEVEL
DISCLAIMER
The contents of this document are intended for practice and learning purposes at the undergraduate
level. The materials are from different sources including the internet and the contributors do not
in any way claim authorship or ownership of them. The materials are also not to be used for any
commercial purpose.
1
LIST OF COURSES
CHM121: General Organic Chemistry
CHM122: General Inorganic Chemistry
*Not included
2
COVENANT UNIVERSITY
CANAANLAND, KM 10, IDIROKO ROAD
P.M.B 1023, OTA, OGUN STATE, NIGERIA
TITLE OF EXAMINATION: BSc DEGREE EXAMINATION
COLLEGE: SCIENCE & TECHNOLOGY
DEPARTMENT: CHEMISTRY
SESSION: 2015/2016
OMEGA
COURSE CODE: CHM121
UNIT: 2
COURSE TITLE: GENERAL ORGANIC CHEMISTRY
INSTRUCTION: ANSWER ALL QUESTIONS
HOURS
1.
2.
3.
4.
5.
6.
7.
8.
9.
SEMESTER:
CREDIT
TIME: 1¾
Propane and octadecane are member of the same homologues series that differ by a constant of
(―CH2―)n. If n is an integer, what is the value of 2n – 10?
(a) 10
(b) 20
(c) 30
(d) 40
(e) 50
n-Octane can be isomerized to obtain a high grade PMS in internal combustion engine. If this octane
burns swiftly in p moles of oxygen gas to produce q moles and r moles of carbon(IV)oxide and water
respectively, what is the value of 5q + r – 4p + 1?
(a) 0
(b) 1
(c) 2
(d) 3
(e) 4
An organic compound which gives effervescence of a gas which turns lime water milky is..............
(a) butane
(b) butanal
(c) butanone
(d) butanoic acid
(e) butanol
Reagent required for synthesis of α,β-unsaturated acid from α,β- unsaturated aldehyde is
(a) toluene reagent
(b) tollens reagent
(c) lucas reagent
(d) biuret
(e) tosmic
reagent
The filtrate from Lassaigne’s sodium fusion was treated with freshly prepared FeSO4 followed by
H2SO4, prussian blue colour formation indicates the presence of…………………
(a) sulphur
(b) nitrogen
(c) phosphorus
(d) chlorine
(e) iodine
Esterification reaction involves treatment of alkanoic acid with alcohol in the presence of mineral
acid to give an ester and water. If the end product ester obtained is butyl propanoate, what will be the
alcohol starting material used?
(a) propanol
(b) pentanal
(c) butanol
(d) ethanol
(e) hexanol
The combustion reaction of a solid hydrocarbon (pentadecane) is as shown below:
C15H32(s) + xO2

yCO2 + zH2O, what is the value of x, y and z?
(a) 23, 15, 16 (b) 20, 17, 32 (c) 17, 18, 19 (d) 15, 16, 23 (e) 15, 16, 17
What is the bond angle of the hybrid orbital obtained from the blending of 2s orbital of carbon
with one of its 2p orbitals?
(a) 109.5o
(b) 105o
(c) 120o
(d) 180o
(e) 90o
If hybridization pattern of BrFx and BeCly gave sp3d2 and sp respectively, what is the value of x – 2y?
(a) 0
(b) 1
(c) 2 (d) 3
(e) 4
3
10.
Overlapping of atomic orbital results in either sigma () or pi () bond. Which of the following result
in bond?
(a) sp2-sp2
(b) sp3-p
(c) sp3-sp3
(d) s-s
(e) sp3-s
3
2
11.
Using sp , sp and sp carbon concept, which of the following
is not a feasible compound
(a) 2,2-dichlorobut-1-ene
(b) 3-chlorobut-1-yne
(c) 2-cyanobutane
(d) 2,2dibromobutane
12.
2-Methyl buta-1,3-diene, being the component of natural rubber; how many and π is/are present
in it?
(a) 6 + 6π
(b) 12 + 2π
(c) 16 + 2π
(d) 15 + 2π
(e) 15 + 2π
13.
Using the graphical formula for hex-1-en-3-yne shown below, solve this equation: 2a + 2b – (d + 2f)
(a) 8o
(b) 18o
(c) 28o
(d) 38o
14.
The following pair of compound exhibits functional group
isomerism except?
(a) CH3COCH3 & CH3CH2CHO (b) CH3CH2NH2 & CH3CH(NH2)CH3
(c) CH3OCH3 & CH3CH2OH
(d) HCOOCH3 & CH3COOH (e) all of the above
15.
The product of oxidation of propan-1-ol in the presence of
excess KMnO4 / H+ is
(a) propane
(b) propanoic acid
(c) propanone
(d) propanal
(e) propanoate
16.
The following are various purification technique for organic
compounds except
(a) dehydration
(b) sublimation
(c) crystallization
(d) distillation
(e)
chromatography
17.
The reagent used to test for the formation of water after
combustion of hydrocarbon is
(a) CuSO4
(b) CoSO4
(c) CaSO4
(d) FeSO4
(e) MgSO4
18.
An organic compound A was discovered to have the molecular formula C5H12O from the elemental
analysis. A had negative reaction with 2,4-dinitrophenylhydrazine and Fehling solution. Treatment of
A with freshly prepared FeCl3 gave no intense colouration but A gave steamy white fume in PCl5 and
separated into two layers after 5minutes in Lucas reagent. Compound A is likely to be …………..
(a) pentan-2-ol
(b) pentanal
(c) pentanone
(d) epoxypropane
(e) pentanoate
19.
Lone pair causes distortion in molecular geometry. Which of the following compounds is expected
to exhibit distorted geometry?
(a) CH4
(b) SF6
(c) PCl5
(d) H2O
(e) CCl4
20.
Which of the following isomerism will not occur within the
same homologous series?
(a) positional
(b) chain
(c) functional group
(d) optical
(e) geometrical
21.
The empirical formula for an organic compound is CH2O, if the molecular formula of such
compound is (CH2O)n and the molar mass is 120, what is the value of n2  6?
(a) 7
(b) 8
(c) 9 (d) 10 (e) 11
22.
An organic compound was shown on a quantitative analysis to contain 40.0% carbon, 6.7% hydrogen,
and 53.3% oxygen. Determine the empirical formula of the compound.
(a) C5H5O2
(b) CHO
(c) C2H2O
(d) CH2O
(e) CH2O2
23.
An instrument used to measure the degree of rotation of plane polarized light is?
(a) polarizer
(b) polaroid
(c) polarimeter
(d) refractometer
(e) diffractometer
4
24
Carbocations can be classified as primary, secondary and tertiary. Which of the following species
is/are a secondary carbocation?
CH 3CH 2CH 2
+
(CH3)2CH
+
(CH3)3C
CH3
I
25
26
27
28
29
30
31
32
II
III
IV
CH3
V
(a) I & II
(b) II & III
(c) III & IV
(d) IV & V
(e) II & IV
The addition of a hydrogen halide to an unsymmetrical alkene is expected to give a major product
according to Markovnikov’s rule. What is the major product of the addition of HBr to the alkene
(CH3)2C═CHCH3?
(a) (CH3)2CHCH2CH3 (b) (CH3)2CBrCH2CH3 (c) (CH3)2CHCHBrCH3 (d)
(CH3)2CHCH2CH2Br
(e) CH3CH2BrCH═CHCH3
Alkenes can be hydrated (i.e. addition of water) to give alcohols in one three methods – under high
temperature and pressure over phosphoric or sulfuric acid as catalyst; treatment with mercuric
acetate followed by reduction with sodium borohydride (Oxymercuration-demercuration) or
treatment with borane, BH3, followed by oxidation with basic hydrogen peroxide (hydroboration).
Give the major product of the reaction of (CH3)2C═CHCH3 when subjected to treatment with
reagents as indicated.
(CH3)2C═CHCH3 with steam in the presence of phosphoric acid as catalyst at 300oC and 6 MPa
pressure
(a) (CH3)2C(OH)CH2CH3 (b) (CH3)2CHCH(OH)CH3 (c) HOCH2CH(CH3)CH2CH3
(d) (CH3)2CHCHCH2OH (e) (CH3)2CH2CHCH2OH
(CH3)2C═CHCH3 in the presence of mercuric acetate (Hg(OAc)2) followed by treatment with
sodium borohydride (NaBH4)
(a) (CH3)2C(OH)CH2CH3 (b) (CH3)2CHCH(OH)CH3 (c) HOCH2CH(CH3)CH2CH3
(d) (CH3)2CHCHCH2OH (e) (CH3)2CH2CHCH2OH
(CH3)2C═CHCH3 in the presence of borane in THF followed by treatment with basic hydrogen
peroxide, H2O2
(a) (CH3)2C(OH)CH2CH3 (b) (CH3)2CHCH(OH)CH3 (c) HOCH2CH(CH3)CH2CH3
(d) (CH3)2CHCHCH2OH (e) (CH3)2CH2CHCH2OH
Alkenes can be hydroxylated when treated with osmium tetroxide/hydrogen peroxide or cold,
dilute solution of KMnO4 under basic conditions.
Give the product of hydroxylation of (CH3)2C═CHCH3 in the presence of osmium tetroxide and
hydrogen peroxide.
(a) HOCH2CH2C(OH)CHCH3 (b) (CH3)2C(OH)CHCH2OH (c)
(CH3)2C(OH)CH(OH)CH3
(d) (CH3)2CCH(OH)2CH3
(e) (CH3)2C(OH)2CHCH3
Alkenes when treated with KMnO4 solution under acidic or basic conditions give different
products.
Give the product of reaction of (CH3)2C═CHCH3 when treated with cold, dilute KMnO4 solution
(a) HOCH2CH2C(OH)CHCH3 (b) (CH3)2C(OH)CHCH2OH (c) (CH3)2C(OH)CH(OH)CH3
(d) (CH3)2CCH(OH)2CH3
(e) (CH3)2C(OH)2CHCH3
Give the products of reaction of (CH3)2C═CHCH3 when treated with hot, concentrated KMnO4
solution
(a) (CH3)2CO & CH3CHO (b) (CH3)2CO & CH3COOH (c) (CH3)2COOH & CH3CHO
(d) (CH3)2COOH & CH3COOH
(e) (CH3)2C(OH)2 & CH3COOH
Give the products of reaction of (CH3)2CHCH═CH2 when treated with hot, concentrated KMnO4
solution
5
+
33
34
35
36
37
38
39
40
41
42
43
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(c) (CH3)2CHCOOH & CO2
(d) (CH3)2CHCHO & CO2
(e) (CH3)2CHCOCH3 & CH2O
Give the products of reaction of (CH3)2CHC(CH3)═CH2 when treated with hot, concentrated
KMnO4 solution
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(c) (CH3)2CHCOOH & CO2
(d) (CH3)2CHCHO & CO2
(e) (CH3)2CHCOCH3 & CH2O
Alkenes can undergo oxidative cleavage when reacted with ozone followed by reduction of the
intermediate ozonide with dimethyl sulfide or zinc
Give the product of the reaction of (CH3)2C═CHCH3 with ozone followed by reduction with dimethyl
sulfide
(a) (CH3)2CO & CH3CHO
(b) (CH3)2CO & CH3COOH
(c) (CH3)2COOH & CH3CHO
(d) (CH3)2COOH & CH3COOH
(e) (CH3)2C(OH)2 & CH3COOH
Give the products of reaction of (CH3)2CHCH═CH2 with ozone followed by reduction with dimethyl
sulfide
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(c) (CH3)2CHCOOH & CO2
(d) (CH3)2CHCHO & CO2
(e) (CH3)2CHCOCH3 & CH2O
Give the products of reaction of (CH3)2CHC(CH3)═CH2 with ozone followed by reduction with
dimethyl sulfide
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(c) (CH3)2CHCOOH & CO2
(d) (CH3)2CHCHO & CO2
(e) (CH3)2CHCOCH3 & CH2O
Molecules of an alkene undergo addition reaction with each other to form a polymer. What is the
repeat unit of the polymer, polyvinyl chloride (PVC)?
(a) ―CH2CH2― (b) ―CH2CHCl―
(c) ―CH2CCl2―
(d) ―CHClCHCl― (e)
―CCl2CCl2―
Propene can be polymerized to polypropene. What is the structure of the repeat unit of
polypropene?
(a)―CH2CH2CH3―(b) ―CH2═CH(CH3)― (c) ―CH2CH(CH3)― (d) ―CH3CHCH3―(e)
―CH═C(CH3)2―
Alkenes can be prepared by the dehydration of alcohols in the presence of concentrated sulfuric and
heating the mixture. What is the product of heating a mixture of 2-methylpropan-2-ol and
concentrated sulfuric acid?
(a) HOCH2C(CH3)2 (b) (HO)2CC(CH3)2 (c) (CH3)2CHCH3 (d) (CH3)2C(CH3)2
(e)
(CH3)2CCH2
What is the major product when 2-methylbutan-2-ol is heated at 80oC in the presence of concentrated
sulfuric acid?
(a) (CH3)2CCHCH3 (b) CH2C(CH3)CH2CH3 (c) (CH3)2CC(CH3)2 (d) CH2CHCH2CH3 (e)
CH3CH2CH2CH3
-Carotene has a molecular formula of C40H56 containing two (2) rings and no triple bonds. How
many double bonds does it have?
(a) 10
(b) 11
(c) 12
(d) 13
(e) 14
Determine the degree of unsaturation for the compounds with the molecular formula C3H6
(a) 1
(b) 2
(c) 3
(d) 4
(e) 5
From your response to question 42, the possible structures for compound with the molecular formula
C3H6 is:
(a)
(b)
H2C
44
C
H2C
CHCH 3
(c)
HC
CCH3
(d) H2C
CHCH 3 HC
CCH3
(e)
CH2
Determine the degree of unsaturation for the hydrocarbon with the molecular formulas C20H34
6
(a) 1
46
(b) 2
(c) 3
(d) 4
(e) 5
What is the molecular formula of 10-carbon hydrocarbon with one  bond and 2 rings?
(a) C10H14
(b) C10H18
(c) C10H20
(d) C10H22
(e) C10H16
What is the correct structure for 3,3-dimethylcyclopentene?
47
(a)
(b)
(c)
What is the name of the compound shown here?
45
H3C
(a) 1,3-dimethylcyclohexane
dimethylcyclohexene
(d) 1,5-dimethylcyclohexene
(d)
(e)
CH3
(b) 1,3-dimethylcyclohexene
(c) 2,4-
(e) 1,6-dimethylcychexene
Use the structures I, II and III to answer questions 48 to 50 respectively. Suggest the IUPAC name
for the following hydrocarbons: I in question 48; II in question 49 and III in question 50.
I
48
49
50
51
52
(a) 3-Methyl-5,7-dimethylenonane
(b) 3-Ethyl-5,7-dimethylnonane
(c)
7-Ethyl-3,5dimethylnonane
(d) 5,7-dimethy-3-ethylnonane
(e) 3,5-diMethyl-7-ethylnonane
(a) 5,6-Diethyl-4-methyldecane
(b) 5,6-Diethyl-7methyldecane
(c)
7-Methyl-5,6diethyldecane
(d) 4-Methyl-5,6-diethyldecane
(e) none of the above
(a) 2-Pentyn-4-ene (b) 2-Pentyn-1-ene (c) 3-Pentyn-1-ene
(d) 4-Pentyn-2-ene
(e) none
of the above
A free radical mechanism involves the following steps except:
(a) initiation
(b) termination (c) propagation (d) (a) & (c)
(e) bromination
Write the major product of the following reaction:
+
53
54
55
III
II
Pt
H2
?
(a) CH3CH2CH2CH3
(b) CH3CH2CH(CH3)3
(c) CH3CH2CH(CH3)2
(d) CH3CH2CH2CH(CH3)2
(e) none of the above
Methane is produced by the hydrolysis of:
(a) CaC2
(b) AlC3
(c) Dry ice
(d) n-C2H5MgBr
(e) none of the above
A hydrocarbon with molecular formula gives only one monochloro derivative. The hydrocarbon is:
(a) n-Octane
(b) 2,2,4-triMethylpentane
(c) 2-Methylpentane (d) 2,2,3,3tetraMethylbutane
(e) none of the above
Consider the following reaction and identify the structure of the product A.
7
AlCl3
2
56
300 oC
A
+
(a) 2-Methylpentane (b) 2-Ethylbutane (c) 2,2-diMethylbutane (d) 3-Methylpentane (e) none of the
above
Identify the structure of the products X in the reaction below:
+
(a)
Br
(b)
Br
Br 2
(c) Br
X
Br
(d)
(e)
BrCH2CH2Br
BrCH2CH3
Br
57
58
Which reagent can easily distinguish between 1-butyne and 2-butyne?
(a)Br2/CCl4
(b) CuCl2/NH4OH (c) Dil. H2SO4/HgSO4 (d) H2, Lindlar catalyst (e) none of
the above
What is the name of compound Y:
H2N
59
60
Br
Y
(a) 2-bromo cyclohexylamine
(b) 2-amino cyclohexylbromine
(c) 3-bromocyclohexylamine
(d) 4-bromo cyclohexylamine
(e) 5-bromo cyclohexylamine
Alkanes burn in an adequate supply of oxygen to form
(a) carbon(II) oxide and steam (b) carbon(IV) oxide and steam (c) carbon and carbon(IV)
oxide
(d) carbon and carbon(II) oxide (e) all of the above
The major product (A) of the chemical reaction represented below is known as:
CrO3/Al2O3
CH3CH2CH2CH2CH3
61
62
63
64
65
66
60 oC
A
+
2 H2
(a) 3-butene
(b) 1,4-pentadiene
(c) 3-pentadiene
(d) 3-pentadiene
(e) 1.3-butadiene
How many straight-chain dichloro-alkanes correspond to the formula C4H8Cl2?
(a) 3
(b) 4
(c) 5
(d) 6
(e) 7
Which of the following alkanes does not contain a secondary carbon atom?
(a) CH3CH2CH3 (b) (CH3)3CCH2CH3 (c) (CH3)2CHCH2CH(CH3)2 (d) (CH3)3CCH(CH3)2 (e)
(b) & (c)
Which one of the following groups of products is formed when methane and chlorine are mixed in
the dark?
(a) carbon powder and hydrogen chloride
(b) chloromethane, dichloromethane, trichloromethane and tetrachloromethane
(c) chloromethane and hydrogen chloride
(d) chloromethane and tetrachloromethane
(e) no products are formed
Double dehydrohalogenation of 1,1- dichloro-3,3-dimethyl-butane gives
(a) 1-chloro-3-methyl-1-pentene
(b) 2, 3-dimethyl-1-butene
(c) 2, 3-dimethyl-1-butyne
(d) 3, 3-dimethyl-1-butyne
(e) 1, 2, 3-trimethyl-1-butene
Which one of the metals below is usually employed in liquid ammonia to convert alkynes to trans
alkenes?
(a) Pt
(b) Pb
(c) Ca
(d) Na
(e) Ni
Which of these statements is/are false?
(a) Ethyne reacts with ammoniacal solution of AgNO3 to form acetylide
8
67
68
69
70
(b) Ethyne reacts with ammoniacal solution of copper (I) chloride to form acetylide
(c) Unterminal alkynes do not react with Cu+ ions in aqueous ammoniacal solution
(d) alkynes which have the triple bond at the end of the chain do not form dicarbides
(e) (a)
and (b)
Acetylene undergoes addition reaction with bromine to give a product of?
(a) 1,2,1,2-tetrabromoethane
(b) 1,2-dibromoethane
(c) 1,1,2,2-tetrabromoethane
(d)1,2-dibromoethene
(e) 1,1,2-tribromoethane
What is the product of addition of 2 moles of chlorine gas to this alkyne, CH3―C≡C―H?
(a) 1,2-dichloropropene
(b) 1,1-dichloropropene
(c) 1,1,2,2-tetrachloropropene
(d) 1,1,2,2-tetrachloropropane (e) 1,2-dichloropropane
What is the name of the following alkyne? CH3―C≡C―CH2―CH3
(a) 1-pentyne (b) 2-pentyne (c) 3-methyl-1-butyne (d) 4-methyl-1-pentyne
(e) 3,3-dimthyl1-butyne
How many different compounds do the following structural formulas represent?
H3C
CH
CH2 CH
CH3
CH2 CH3
H2C
CH
CH3 CH3
CH3
I
CH
CH
CH3
CH3
CH3
H3C
CH3
II
CH3
H3C
CH2 CH
CH
CH2 CH
CH3
III
CH2 CH2
H3C
CH
CH3
H3C
CH2 C
CH2 CH3
CH3
CH2
CH3
H
IV
(V)
(a) 1
(b) 2
(c) 3
(d) 4
(e) 5
9
COVENANT UNIVERSITY
CANAANLAND, KM 10, IDIROKO ROAD
P.M.B 1023, OTA, OGUN STATE, NIGERIA
TITLE OF EXAMINATION:
COLLEGE:
DEPARTMENT:
SESSION:
BSc DEGREE EXAMINATION
SCIENCE & TECHNOLOGY
CHEMISTRY
2015/2016
SEMESTER:
OMEGA
CHM 121
CREDIT UNIT:
GENERAL ORGANIC CHEMISTRY
ANSWER ALL QUESTIONS
TIME:
COURSE CODE:
COURSE TITLE:
INSTRUCTION:
HOURS
2
2
1. Propane and octadecane are member of the same homologues series that differ by a
constant of (―CH2―)n. If n is an integer, what is the value of 2n – 10?
(a) 10
(b) 20
(c) 30
(d) 40
(e) 50
2. n-Octane can be isomerized to obtain a high grade PMS in internal combustion engine. If
this octane burns swiftly in p moles of oxygen gas to produce q moles and r moles of
carbon(IV)oxide and water respectively, what is the value of 5q + r – 4p + 1?
(a) 0
(b) 1
(c) 2
(d) 3
(e) 4
3. An organic compound which gives effervescence of a gas which turns lime water milky
is..............
(a) butane
(b) butanal
(c) butanone (d) butanoic acid (e) butanol
4. Reagent required for synthesis of α,β-unsaturated acid from α,β- unsaturated aldehyde
is
(a) toluene reagent
tosmic reagent
(b) tollens reagent
(c) lucas reagent
(d) biuret
(e)
5. The filtrate from Lassaigne’s sodium fusion was treated with freshly prepared FeSO 4
followed by H2SO4, prussian blue colour formation indicates the presence of…………………
10
(a) sulphur
(b) nitrogen
(c) phosphorus
(d) chlorine
(e) iodine
6. Esterification reaction involves treatment of alkanoic acid with alcohol in the presence of
mineral acid to give an ester and water. If the end product ester obtained is butyl
propanoate, what will be the alcohol starting material used?
(a) propanol (b) pentanal
(c) butanol
(d) ethanol
(e) hexanol
7. The combustion reaction of a solid hydrocarbon (pentadecane) is as shown below:
C15H32(s)
+
xO2

yCO2
+
zH2O, what is the value of x, y and z?
(a) 23, 15, 16 (b) 20, 17, 32 (c) 17, 18, 19 (d) 15, 16, 23 (e) 15, 16, 17
8. What is the bond angle of the hybrid orbital obtained from the blending of 2s orbital of
carbon with one of its 2p orbitals?
(a) 109.5o
(b) 105o
(c) 120o
(d) 180o
(e) 90o
9. If hybridization pattern of BrFx and BeCly gave sp3d2 and sp respectively, what is the value
of x – 2y?
(a) 0
(b) 1
(c) 2 (d) 3
(e) 4
10. Overlapping of atomic orbital results in either sigma () or pi () bond. Which of the
following result in  bond?
(a) sp2-sp2
(b) sp3-p
(c) sp3-sp3
(e) sp3-s
(d) s-s
11. Using sp3, sp2 and sp carbon concept, which of the following is not a feasible compound
(a) 2,2-dichlorobut-1-ene
dibromobutane
(b) 3-chlorobut-1-yne
(c) 2-cyanobutane
(d) 2,2-
12. 2-Methyl buta-1,3-diene, being the component of natural rubber; how many  and π
is/are present in it?
(a) 6 + 6π
(b) 12 + 2π
(c) 16 + 2π
(d) 15 + 2π
(e) 15 + 2π
13. Using the graphical formula for hex-1-en-3-yne shown below, solve this equation: 2a + 2b
– (d + 2f)
(a) 8o
(b) 18o
(c) 28o
(d) 38o
11
14. The following pair of compound exhibits functional group isomerism except?
(a) CH3COCH3 & CH3CH2CHO (b) CH3CH2NH2 & CH3CH(NH2)CH3 (c) CH3OCH3 &
CH3CH2OH
(d) HCOOCH3 & CH3COOH
(e) all of the above
15. The product of oxidation of propan-1-ol in the presence of excess KMnO4/H+ is
(a) propane
(b) propanoic acid
(c) propanone
(d) propanal
(e) propanoate
16. The following are various purification technique for organic compounds except
(a) dehydration
(b) sublimation (c) crystallization
(d) distillation
(e)
chromatography
17. The reagent used to test for the formation of water after combustion of hydrocarbon is
(a) CuSO4
(b) CoSO4
(c) CaSO4
(d) FeSO4
(e) MgSO4
18. An organic compound A was discovered to have the molecular formula C5H12O from the
elemental analysis. A had negative reaction with 2,4-dinitrophenylhydrazine and Fehling
solution. Treatment of A with freshly prepared FeCl3 gave no intense colouration but A
gave steamy white fume in PCl5 and separated into two layers after 5minutes in Lucas
reagent. Compound A is likely to be …………..
(a) pentan-2-ol
(b) pentanal
(c) pentanone
(d) epoxypropane
(e)
pentanoate
19. Lone pair causes distortion in molecular geometry. Which of the following compounds is
expected to exhibit distorted geometry?
(a) CH4
(b) SF6
(c) PCl5
(d) H2O
(e) CCl4
20. Which of the following isomerism will not occur within the same homologous series?
12
(a) positional
geometrical
(b) chain
(c) functional group
(d) optical
(e)
21. The empirical formula for an organic compound is CH2O, if the molecular formula of such
compound is (CH2O)n and the molar mass is 120, what is the value of n2  6?
(a) 7
(b) 8
(c) 9 (d) 10 (e) 11
22. An organic compound was shown on a quantitative analysis to contain 40.0% carbon,
6.7% hydrogen, and 53.3% oxygen. Determine the empirical formula of the compound.
(a) C5H5O2
(b) CHO
(c) C2H2O
(d) CH2O
(e) CH2O2
23. An instrument used to measure the degree of rotation of plane polarized light is?
(a) polarizer (b) polaroid (c) polarimeter (d) refractometer
(e) diffractometer
24. Carbocations can be classified as primary, secondary and tertiary. Which of the following
species is/are a secondary carbocation?
CH 3CH 2CH 2
+
(CH3)2CH
+
(CH3)3C
CH3
I
(a) I & II
II
III
(b) II & III
(c) III & IV
IV
+
CH3
(d) IV & V
V
(e) II & IV
25. The addition of a hydrogen halide to an unsymmetrical alkene is expected to give a major
product according to Markovnikov’s rule. What is the major product of the addition of
HBr to the alkene (CH3)2C═CHCH3?
(a) (CH3)2CHCH2CH3
(CH3)2CHCH2CH2Br
(b) (CH3)2CBrCH2CH3
(c) (CH3)2CHCHBrCH3
(e) CH3CH2BrCH═CHCH3
(d)
26. Alkenes can be hydrated (i.e. addition of water) to give alcohols in one three methods –
under high temperature and pressure over phosphoric or sulfuric acid as catalyst;
treatment with mercuric acetate followed by reduction with sodium borohydride
(Oxymercuration-demercuration) or treatment with borane, BH3, followed by oxidation
with basic hydrogen peroxide (hydroboration). Give the major product of the reaction of
(CH3)2C═CHCH3 when subjected to treatment with reagents as indicated. (CH3)2C═CHCH3
with steam in the presence of phosphoric acid as catalyst at 300 oC and 6 MPa pressure
13
(a) (CH3)2C(OH)CH2CH3
(CH3)2CHCHCH2OH
(b) (CH3)2CHCH(OH)CH3
(e) (CH3)2CH2CHCH2OH
(c) HOCH2CH(CH3)CH2CH3
(d)
27. (CH3)2C═CHCH3 in the presence of mercuric acetate (Hg(OAc)2) followed by treatment
with sodium borohydride (NaBH4)
(a) (CH3)2C(OH)CH2CH3 (b) (CH3)2CHCH(OH)CH3
(c) HOCH2CH(CH3)CH2CH3
(d)
(CH3)2CHCHCH2OH
(e) (CH3)2CH2CHCH2OH
28. (CH3)2C═CHCH3 in the presence of borane in THF followed by treatment with basic
hydrogen peroxide, H2O2
(a) (CH3)2C(OH)CH2CH3 (b) (CH3)2CHCH(OH)CH3
(c) HOCH2CH(CH3)CH2CH3
(d)
(CH3)2CHCHCH2OH
(e) (CH3)2CH2CHCH2OH
29. Alkenes can be hydroxylated when treated with osmium tetroxide/hydrogen peroxide or
cold, dilute solution of KMnO4 under basic conditions. Give the product of hydroxylation
of (CH3)2C═CHCH3 in the presence of osmium tetroxide and hydrogen peroxide.
(a) HOCH2CH2C(OH)CHCH3 (b) (CH3)2C(OH)CHCH2OH
(c)
(CH3)2C(OH)CH(OH)CH3
(d) (CH3)2CCH(OH)2CH3
(e) (CH3)2C(OH)2CHCH3
30. Alkenes when treated with KMnO4 solution under acidic or basic conditions give different
products. Give the product of reaction of (CH3)2C═CHCH3 when treated with cold, dilute
KMnO4 solution
(a) HOCH2CH2C(OH)CHCH3 (b) (CH3)2C(OH)CHCH2OH
(c)
(CH3)2C(OH)CH(OH)CH3
(d) (CH3)2CCH(OH)2CH3
(e) (CH3)2C(OH)2CHCH3
31. Give the products of reaction of (CH3)2C═CHCH3 when treated with hot, concentrated
KMnO4 solution
(a) (CH3)2CO & CH3CHO (b) (CH3)2CO & CH3COOH (c) (CH3)2COOH & CH3CHO
(CH3)2COOH & CH3COOH (e) (CH3)2C(OH)2 & CH3COOH
(d)
32. Give the products of reaction of (CH3)2CHCH═CH2 when treated with hot, concentrated
KMnO4 solution
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(d) (CH3)2CHCHO & CO2
(c) (CH3)2CHCOOH & CO2
(e) (CH3)2CHCOCH3 & CH2O
33. Give the products of reaction of (CH3)2CHC(CH3)═CH2 when treated with hot,
concentrated KMnO4 solution
14
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(d) (CH3)2CHCHO & CO2
(c) (CH3)2CHCOOH & CO2
(e) (CH3)2CHCOCH3 & CH2O
34. Alkenes can undergo oxidative cleavage when reacted with ozone followed by reduction
of the intermediate ozonide with dimethyl sulfide or zinc. Give the product of the reaction
of (CH3)2C═CHCH3 with ozone followed by reduction with dimethyl sulfide
(a) (CH3)2CO & CH3CHO (b) (CH3)2CO & CH3COOH (c) (CH3)2COOH & CH3CHO
(CH3)2COOH & CH3COOH (e) (CH3)2C(OH)2 & CH3COOH
(d)
35. Give the products of reaction of (CH3)2CHCH═CH2 with ozone followed by reduction with
dimethyl sulfide
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(d) (CH3)2CHCHO & CO2
(c) (CH3)2CHCOOH & CO2
(e) (CH3)2CHCOCH3 & CH2O
36. Give the products of reaction of (CH3)2CHC(CH3)═CH2 with ozone followed by reduction
with dimethyl sulfide
(a) (CH3)2CHCHO & CH2O
(b) (CH3)2CHCOCH3 & CO2
(d) (CH3)2CHCHO & CO2
(c) (CH3)2CHCOOH & CO2
(e) (CH3)2CHCOCH3 & CH2O
37. Molecules of an alkene undergo addition with each other to form a polymer. What is the
repeat unit of the polymer, polyvinyl chloride (PVC)?
(a) ―CH2CH2―
(b) ―CH2CHCl―
(c) ―CH2CCl2―
(d) ―CHClCHCl―
(e)
―CCl2CCl2―
38. Propene can be polymerized to polypropene. What is the structure of the repeat unit of
polypropene?
(a) ―CH2CH2CH3―
(b) ―CH2═CH(CH3)―
―CH3CHCH3―
(e) ―CH═C(CH3)2―
(c) ―CH2CH(CH3)―
(d)
39. Alkenes can be prepared by the dehydration of alcohols in the presence of concentrated
sulfuric and heating the mixture. What is the product of heating a mixture of 2methylpropan-2-ol and concentrated sulfuric acid?
(a) HOCH2C(CH3)2
(CH3)2CCH2
(b) (HO)2CC(CH3)2
(c) (CH3)2CHCH3
(d) (CH3)2C(CH3)2
(e)
15
40. What is the major product when 2-methylbutan-2-ol is heated at 80oC in the presence of
concentrated sulfuric acid?
(a) (CH3)2CCHCH3
CH3CH2CH2CH3
(b) CH2C(CH3)CH2CH3
(c) (CH3)2CC(CH3)2
(d) CH2CHCH2CH3
(e)
41. -Carotene has a molecular formula of C40H56 containing two (2) rings and no triple bonds.
How many double bonds does it have?
(a) 10
(b) 11
(e) 14
(c) 12
(d) 13
42. Determine the degree of unsaturation for the compounds with the molecular formula
C3H6
(a) 1
(b) 2
(e) 5
(c) 3
(d) 4
43. From your response to question 19, the possible structures for compound with the
molecular formula C3H6 is:
(a)
H2C
(b)
H2C
C
CHCH 3
(c)
HC
CCH3
(d) H2C
CHCH 3 HC
CCH3
(e)
CH2
44. Determine the degree of unsaturation for the hydrocarbon with the molecular formulas
C20H34
(a) 1
(b) 2
(e) 5
(c) 3
(d) 4
45. What is the molecular formula of 10-carbon hydrocarbon with one  bond and 2 rings?
(a) C10H14
(b) C10H18
(c) C10H20
(e) C10H16
46. What is the correct structure for 3,3-dimethylcyclopentene?
(a)
(b)
(c)
(d) C10H22
(d)
(e)
47. What is the name of the compound shown here?
H3C
CH3
16
(a) 1,3-dimethylcyclohexane
dimethylcyclohexene
(b) 1,3-dimethylcyclohexene
(d) 1,5-dimethylcyclohexene
(e) 1,6-dimethylcychexene
(c) 2,4-
Use the structures I, II and III to answer questions 48 to 50 respectively. Suggest IUPAC name for the
following hydrocarbons:
I
III
II
48. (a) 3-Methyl-5,7-dimethylenonane (b) 3-Ethyl-5,7-dimethylnonane
dimethylnonane
(d) 5,7-dimethy-3-ethylnonane
(e) 3,5-diMethyl-7-ethylnonane
(c)
7-Ethyl-3,5-
49. (a) 5,6-Diethyl-4-methyldecane
(b) 5,6-Diethyl-7methyldecane
(c)
7-Methyl-5,6diethyldecane
(d) 4-Methyl-5,6-diethyldecane
(e) none of the above
50. (a) 2-Pentyn-4-ene (b) 2-Pentyn-1-ene (c) 3-Pentyn-1-ene (d) 4-Pentyn-2-ene (e) none
of the above
51. A free radical mechanism involves the following steps except:
(a) initiation
(b) termination (c) propagation (d) (a) & (c)
(e) bromination
52. Write the major product of the following reaction:
+
(a) CH3CH2CH2CH3 (b) CH3CH2CH(CH3)3
none of the above
Pt
H2
(c) CH3CH2CH(CH3)2
53. Methane is produced by the hydrolysis of:
(a) CaC2
(b) AlC3
(c) Dry ice
(d) n-C2H5MgBr
?
(d) CH3CH2CH2CH(CH3)2
(e)
(e) none of the above
54. A hydrocarbon with molecular formula gives only one monochloro derivative. The hydrocarbon
is:
(a) n-Octane (b) 2,2,4-triMethylpentane (c) 2-Methylpentane (d) 2,2,3,3tetraMethylbutane
(e) none of the above
55. Consider the following reaction and identify the structure of the product A.
2
(a) 2-Methylpentane
none of the above
AlCl3
300 oC
A
(b) 2-Ethylbutane
+
(c) 2,2-diMethylbutane (d) 3-Methylpentane
(e)
17
56. Identify the structure of the products X in the reaction below:
+
(a)
Br
Br 2
(b)
X
Br
(c) Br
Br
(d)
(e)
BrCH2CH2Br
BrCH2CH3
Br
57. Which reagent can easily distinguish between 1-butyne and 2-butyne?
(a)Br2/CCl4
(b) CuCl2/NH4OH (c) Dil H2SO4/HgSO4 (d) H2, Lindlar catalyst (e) none of
the above
58. What is the name of compound Y:
H2N
Br
Y
(a) 2-bromo cyclohexylamine
bromocyclohexylamine
(b) 2-amino cyclohexylbromine
(d) 4-bromo cyclohexylamine
(e) 5-bromo cyclohexylamine
(c) 3-
59. Alkanes burn in an adequate supply of oxygen to form
(a) carbon(II) oxide and steam (b) carbon(IV) oxide and steam (c) carbon and carbon(IV)
oxide
(d) carbon and carbon(II) oxide (e) all of the above
60. The major product (A) of the chemical reaction represented below is known as
CrO3/Al2O3
CH3CH2CH2CH2CH3
o
60 C
61.
62.
63.
64.
A
+
2 H2
(a) 3-butene
(b) 1,4-pentadiene (c) 3-pentadiene (d) 3-pentadiene (e) 1.3-butadiene
How many straight-chain dichloro-alkanes correspond to the formula C4H8Cl2?
(a) 3
(b) 4
(c) 5
(d) 6
(e) 7
Which of the following alkanes does not contain a secondary carbon atom?
(a) CH3CH2CH3 (b) (CH3)3CCH2CH3 (c) (CH3)2CHCH2CH(CH3)2
(d) (CH3)3CCH(CH3)2 (e) (b)
and (c)
Which one of the following groups of products is formed when methane and chlorine are mixed
in the dark?
(a) carbon powder and hydrogen chloride
(b) chloromethane, dichloromethane,
trichloromethane and tetrachloromethane
(c) chloromethane and hydrogen chloride
(c) chloromethane and tetrachloromethane
(e) no products are
formed
Double dehydrohalogenation of 1,1- dichloro-3,3-dimethyl-butane gives
(a) 1-chloro-3-methyl-1-pentene
(b) 2, 3-dimethyl-1-butene (c) 2, 3-dimethyl-1-butyne
(d) 3, 3-dimethyl-1-butyne
(e) 1, 2, 3-trimethyl-1-butene
18
65. Which one of the metals below is usually employed in liquid ammonia to convert alkynes to trans
alkenes?
(a) Pt
(b) Pb
(c) Ca
(d) Na
(e) Ni
66. Which of these statements is/are false?
(a) Ethyne reacts with ammoniacal solution of AgNO3 to form acetylide (b) Ethyne reacts with
ammoniacal solution of copper (I) chloride to form acetylide
(c) Unterminal alkynes do not
+
react with Cu ions in aqueous ammoniacal solution
(d) alkynes which have the triple bond
at the end of the chain do not form dicarbides (e) (a) and (b)
67. Acetylene undergoes addition reaction with bromine to give a product of?
(a) 1,2,1,2-tetrabromoethane
(b) 1,2-dibromoethane
(c) 1,1,2,2-tetrabromoethane
(d)1,2-dibromoethene
(e) 1,1,2-tribromoethane
68. What is the product of addition of 2 moles of chlorine gas to this alkyne, CH3―C≡C―H?
(a) 1,2-dichloropropene
tetrachloropropene
tetrachloropropane
(b) 1,1-dichloropropene
(d) 1,1,2,2(e) 1,2-dichloropropane
(c) 1,1,2,2-
69. What is the name of the following alkyne? CH3―C≡C―CH2―CH3
(a) 1-pentyne (b) 2-pentyne (c) 3-methyl-1-butyne (d) 4-methyl-1-pentyne (e) 3,3dimthyl-1-butyne
70. How many different compounds do the following structural formulas represent?
H3C
CH
CH2 CH
CH3
CH2 CH3
H2C
CH
CH3 CH3
CH3
I
CH
CH
CH3
CH3
CH3
H3C
CH3
II
CH3
H3C
CH2 CH
CH
CH2 CH
CH3
III
CH2 CH2
H3C
CH
CH3
H3C
CH2 C
CH2 CH3
CH3
CH2
CH3
H
IV
(V)
(a) 1
(b) 2
(c) 3
(d) 4
(e) 5
19
COVENANT UNIVERSITY
CANAANLAND, KM 10, IDIROKO ROAD
P.M.B 1023, OTA, OGUN STATE, NIGERIA.
TITLE OF EXAMINATION: B.Sc/B.Eng Degree Examination
COLLEGE:
Science and Technology
DEPARTMENT:
Chemistry
SESSION:
2015/2016
SEMESTER: Omega
COURSE CODE:
CHM122
CREDIT UNIT: 2
COURSE TITLE:
General Inorganic Chemistry
TIME: 1½ hours
INSTRUCTION:
Attempt all questions.
1. All of the following physical properties are TRUE of the elements Li, Na, K and Rb except
A. Body centered cubic structure
B. Silvery in appearance and show typical metallic character
C. Poor conductor of heat and electricity
D. low densities and low melting points
2. Shielding or screening effect in atom can be described as
A. The ability of inner electrons to reduce the attraction of the nucleus for the outer
electrons.
B. The coordinated shift of bonding electrons
C. The ability of the atom of an element to catenate
D. The ability of outer electrons to reduce nucleophilic attraction
3. In the body centered cubic structure of NaCl lattice, Na+ and Cl- are arranged in a pattern in
which
A. One (1) Na+ is bonded to at least three (5) Cl- in a crystal lattice
B. One (1) Na+ is bonded to at least six (6) Cl- in a crystal lattice
C. One (1) Cl- is bonded to at least four (4) Na+ in a crystal lattice
D. One (1) Cl- is bonded to at least six (3) Na+ in a crystal lattice
4. Metallic bonding is defined as
A. The electrostatic attraction between delocalized valence electrons and metal cations
B. The bond formed by a cationic pair
C. The London forces binding cations and electrons together
D. The bond formed by Vander Waal forces
5. Which of the following statements is true of the size related property of group IA metals?
A. The smaller the size of a metal atom, the stronger the metallic bond strength and the
lower the melting point.
B. Boiling point for the group decreases downward due to the weakening of metallic bonds
between atoms as size decreases.
20
C. The smaller the size of a metal atom, the stronger the metallic bond strength and the
higher the melting point
D. Boiling point for the group also increases downward due to the weakening of metallic
bonds between atoms as size increases.
6. Which of the following pairs of ion is not isoelectronic?
A. Mg2+ and Al3+
B. K+ and Ca2+
C. Na+ and ClD. Rb+ and Sr2+
7. Which of the following statements is TRUE of these reactions?
𝑁𝑎(𝑔) → 𝑁𝑎 + (𝑔) + 𝑒 − 1𝑠𝑡 𝐼. 𝐸 = +492 𝐾𝐽𝑚𝑜𝑙 −1
𝐶𝑠(𝑔) → 𝐶𝑠 + (𝑔) + 𝑒 − 1𝑠𝑡 𝐼. 𝐸 = +376 𝐾𝐽𝑚𝑜𝑙 −1
A. Sodium (Na) is more electropositive and a better reducing agent than Cs
B. Shielding effect decreases ease of removal of valence electrons in Cs more than Na
C. More energy is required to remove an electron that is not tightly held by the nucleus in Cs
than Na
D. Caesium (Cs) is more electropositive and a better reducing agent than Na
8. Identify compounds (i), (ii), (iii) in the following reaction
(𝑖)
4𝐿𝑖𝐻 + 𝐴𝑙𝐶𝑙3 →
(𝑖𝑖) + (𝑖𝑖𝑖)
A. (𝑖) 𝐶𝐻3 𝑂𝐶2 𝐻5 , (𝑖𝑖) 𝐿𝑖(𝐴𝑙𝐻4 ), (𝑖𝑖𝑖)𝐿𝑖𝐶𝑙
B. (𝑖) 𝐶𝐻3 𝐶6 𝐻5 , (𝑖𝑖) 𝐿𝑖(𝐴𝑙𝐻4 ), (𝑖𝑖𝑖)𝐿𝑖𝐶𝑙
C. (𝑖) 𝐶6 𝐻6 , (𝑖𝑖) 𝐿𝑖(𝐴𝑙𝐻3 ), (𝑖𝑖𝑖)𝐿𝑖𝐶𝑙
D. (𝑖) 𝑁𝐻2 𝐶6 𝐻5 , (𝑖𝑖) 𝐿𝑖(𝐴𝑙𝐻3 ), (𝑖𝑖𝑖)𝐿𝑖𝐶𝑙
9. What are the unknown products in the following reaction?
𝑅𝑏𝐻 + 𝐻2 𝑂 → (𝑖) + (𝑖𝑖)
A. (𝑖) 𝑅𝑏2 𝑂 (𝑖𝑖) 𝐻2
B. (𝑖) 𝑅𝑏𝑂𝐻 (𝑖𝑖) 𝐻2 C. (𝑖) 𝑅𝑏𝑂 (𝑖𝑖) 𝐻2
10. In the following reaction, (i) and (ii) represent
D. (𝑖) 𝑅𝑏2 𝑂2 (𝑖𝑖) 𝐻2
𝑤𝑎𝑟𝑚
𝑁𝑎2 𝑂2 (𝑠) + 𝐻2 𝑂(𝑙) →
B. (𝑖) 𝑁𝑎𝑂𝐻 (𝑖𝑖) 𝐻2
(𝑖) + (𝑖𝑖)
C. (𝑖) 𝑁𝑎𝑂𝐻 (𝑖𝑖) 𝑂2
A. (𝑖) 𝑁𝑎2 𝑂 (𝑖𝑖) 𝐻2 𝑂2
D.
(𝑖) 𝑁𝑎2 𝑂 (𝑖𝑖) 𝐻2
11. What is the economic significance of the major product of the following reaction?
𝑁𝑎𝐼(𝑠) + 𝐻3 𝑃𝑂4 (𝑙) → ? + ??
A. 𝐻𝐼𝑂3, one of its product is an oxidizing agent
B. 𝑁𝑎2 𝐼𝑃𝑂4, one of its product is used as a cleansing agent
C. 𝑁𝑎3 𝑃𝑂4, one of its product is used for making dough rise
D. 𝑁𝑎𝐻2 𝑃𝑂4, one of its product has potential application as fertilizer
12. Which of the following metal nitrates has a different decomposition product?
A. 𝐶𝑠𝑁𝑂3
B. 𝑀𝑔(𝑁𝑂3 )2
C. 𝑆𝑟(𝑁𝑂3 )2
D. 𝐿𝑖𝑁𝑂3
13. According to Fajan’s rule, boron (B) has a diagonal relationship with which of the following
atom of element?
A. Mg
B. Be
C. Al
D. Si
14. The crystal structures of group IIA elements are given in Table 1 below
21
Table 1: Excerpt showing crystal structure of elements
Element Crystal Structure
Be
Hexagonal close packed (hcp)
Mg
Hexagonal close packed (hcp)
Ca
Face centered cubic (fcc)
Sr
Face centered cubic (fcc)
Ba
Body centered cubic (bcc)
Ra
Body centered cubic (bcc)
What is the expected trend of melting point in Be, Mg, Ca, Sr, Ba and Ra?
A. Be<<Mg; Ca<Sr; Ba< Ra
B. Be˃˃Mg; Ca˃Sr; Ba< Ra
C. Be˃˃Mg; Ca˃Sr; Ba˃Ra
D. Be<<Mg; Ca˃Sr; Ba˃Ra
+
15. The existence of Tl and its comparative stability over Tl3+ is as a result of
A. Oxidation
B. Redox effect
C. resonance effect D. inert pair effect
16. Identify the product of the following reaction and its potential application.
𝑇𝑙(𝑠) + 𝑆𝑒(𝑠) → ?
A. 𝑇𝑙2 𝑆𝑒, refractory materials B. 𝑇𝑙𝑆𝑒3 , templating materials
C. 𝑇𝑙𝑆𝑒3 , an oxidizing agent
D. 𝑇𝑙3 𝑆𝑒2, ceramic materials
17. The following reaction shows the base hydrolysis of a group IIIA element
2𝑀 + 2𝑂𝐻 − + 6𝐻2 𝑂 → 2𝑀(𝑂𝐻)4 − + 3𝐻2 , what is M?
A. In or Al
B. Ga or In
C. Al or Ga
D. In or Tl
18. The correct Lewis structure of borax is…..
O
A NaO
B
O B
B OO
O
B
C
NaO
B
B NaO
HB
ONa
B
OH
O B
B OO
O
B
ONa
D
NaO
B
O
O B
HB O O
B
ONa
O
O B
O
B
O
HB
Na
ONa
19. The general formula of the hydrides formed by boron is….
A. 𝐵𝑛 𝐻𝑛+3 … . 𝐵𝑛 𝐻𝑛+6
B. 𝐵𝑛 𝐻𝑛+4 … . 𝐵𝑛 𝐻𝑛+6
C. 𝐵𝑛 𝐻𝑛+2 … . 𝐵𝑛 𝐻𝑛+5
D. 𝐵𝑛 𝐻𝑛+1 … . 𝐵𝑛 𝐻𝑛+3
Use the following information to answer question 20-22: Given that for s and p orbitals (i)
electrons in principal shell higher than the e- in question contribute 0 to screening constant, σ;
(ii) each electron in the same principal shell contributes 0.35 to σ; (iii) electrons in (n-1) shell
each contribute 0.85 to σ; (iv) Electrons in deeper shell each contribute 1.00 to σ
22
20. Calculate the effective nuclear charge, Z* for 2p electron 8O
A. 2.56
B. 3.28
C. 4.55
D. 1.95
21. Calculate the effective nuclear charge, Z* for 4p electron 31Ga
A. 3.5
B. 4.8
C. 6.4
D. 5.0
22. Calculate the effective nuclear charge, Z* for 5s electron 52Te
A. 7.5
B. 6.95
C. 8.32
D. 7.4
23. In the reaction involving extraction of boron (B) from boron halide by electric arc furnace
reduction method, x, y and z represent
𝐵𝐶𝑙3(𝑠) + 𝑥 → W 0 𝑦 + 𝑧
1500 𝐶
A. 𝑥 = 𝐻2 ; 𝑦 = 𝐵; 𝑧 = 𝐻𝐶𝑙
B. 𝑥 = 𝑁𝑎; 𝑦 = 𝐵; 𝑧 = 𝑁𝑎𝐶𝑙
C. 𝑥 = 𝐿𝑖; 𝑦 = 𝐵; 𝑧 = 𝐿𝑖𝐶𝑙
D. 𝑥 = 𝐾; 𝑦 = 𝐵; 𝑧 = 𝐾𝐶𝑙
24. The full order of shielding ability in electronic orbitals is ……..
A. s<p<d<f
B. s<p˃d˃f
C. s>p>d>f
25. Which of the following ions has the largest ionic radius?
A. Li+
B. Al3+
C. Mg2+
D. s>p>d<f
D. Na+
26. Si and Ge can be commonly produced by ……
A. Reduction of SiO2 with CaC2, while GeO2 is reduced with H2
B. Reduction of SiH4 with carbon, while GeH4 is reduced with CaC2
C. Oxidation of SiH4 with O3, while GeH4 is reduced with CaC2
D. Oxidation of SiC with O3, while GeH4 is reduced with CaC2
27. The two (2) main crystalline allotropic forms of tin, Sn are …….
A. red and blue tin, Sn
B. white and red tin, Sn
C. white and gray tin, Sn
D. blue and white tin, Sn
28. The following reactions are involved in the process of extracting lead, Pb in the blast furnace,
identify a, b, c and d.
2𝑃𝑏𝑆(𝑠) + 𝑎 → 𝑏 + 𝑐 … . . 𝑠𝑡𝑒𝑝 1
𝑏 + 𝐶(𝑠) → 𝑃𝑏(𝑠) + 𝑑 … … 𝑠𝑡𝑒𝑝 2
A. 𝑎 = 𝑂2(𝑔) ; 𝑏 = 𝑃𝑏𝑂(𝑠) ; 𝑐 = 𝑆𝑂2(𝑔) ; 𝑑 = 𝐶𝑂2(𝑔)
B. 𝑎 = 𝑂2(𝑔) ; 𝑏 = 𝑃𝑏𝑂2 (𝑠) ; 𝑐 = 𝑆𝑂3(𝑔) ; 𝑑 = 𝐶𝑂2(𝑔)
C. 𝑎 = 𝑇𝑖𝑂2(𝑔) ; 𝑏 = 𝑃𝑏𝑂2 (𝑠) ; 𝑐 = 𝑆𝑂2(𝑔) ; 𝑑 = 𝐶𝑂2(𝑔)
D. 𝑎 = 𝑆𝑖𝑂2(𝑔) ; 𝑏 = 𝑃𝑏𝑂(𝑠) ; 𝑐 = 𝑆𝑂2(𝑔) ; 𝑑 = 𝐶𝑂(𝑔)
29. The oxidation number of C in 𝐴𝑙4 𝐶3 𝑎𝑛𝑑 𝐵𝑒2 𝐶 is ……..
A. +1
B. -2
C. -1
D. -4
30. Which of the following is not an example of strong acid?
A. 𝐻𝑁𝑂3
B. 𝐻𝐶𝑙𝑂4
C. 𝐻𝐵𝑟
D. HF
31. Which of the following species is an amphiprotic substance?
A. 𝐻2 𝑂
B. 𝑃𝑂43−
C. 𝐶𝐻3 𝑁𝐻2
D. 𝐶𝐻3 𝑁𝐻3+
32. Calculate the number of electrons that are transferred in the following equation
23
A. 4𝑒 −
6𝐹𝑒 2+ (𝑎𝑞) + 2𝐻𝑁𝑂3(𝑎𝑞) + 6𝐻 + (𝑎𝑞) → 6𝐹𝑒 3+ (𝑎𝑞) + 2𝑁𝑂(𝑔) + 4𝐻2 𝑂(𝑙)
B. 6𝑒 −
C. 2𝑒 −
D. 1𝑒 −
𝐻𝑁𝑂3(𝐶)
𝐻2 𝑂
33. The balanced equation for reaction of 𝑃 →hot 𝑃4 𝑂10 → 𝐻3 𝑃𝑂4 is …….
A. 3𝑃(𝑠) + 5𝐻𝑁𝑂3(𝑎𝑞) + 2𝐻2 𝑂(𝑙) → 3𝐻3 𝑃𝑂4(𝑎𝑞) + 5𝑁𝑂(𝑔)
B. 3𝑃(𝑠) + 6𝐻𝑁𝑂3(𝑎𝑞) + 2𝐻2 𝑂(𝑙) → 3𝐻3 𝑃𝑂4(𝑎𝑞) + 6𝑁𝑂2(𝑔)
C. 3𝑃(𝑠) + 5𝐻𝑁𝑂3(𝑎𝑞) + 2𝐻2 𝑂(𝑙) → 3𝐻3 𝑃𝑂4(𝑎𝑞) + 5𝑁𝑂2(𝑔)
D. 3𝑃(𝑠) + 5𝐻𝑁𝑂3(𝑎𝑞) + 4𝐻2 𝑂(𝑙) → 4𝐻3 𝑃𝑂4(𝑎𝑞) + 5𝑁𝑂(𝑔)
34. The Ostwald process for production of HNO3 involves the following reactions; identify a, b
and c species.
𝑎 + 5𝑂2(𝑔) → 𝑏 + 6𝐻2 𝑂(𝑙) … … (𝑖)
𝑏 + 𝑂2(𝑔) → 2𝑁𝑂2 (𝑔) … … (𝑖𝑖)
3𝑁𝑂2(𝑔) + 𝐻2 𝑂(𝑙) → 𝑐 + 𝑏 … . (𝑖𝑖𝑖)
A. 𝑎 = 𝑁𝐻2 𝑁𝐻2(𝑎𝑞) ; 𝑏 = 𝑁2 𝑂4 (𝑔) ; 𝑐 = 𝐻𝑁𝑂3(𝑎𝑞)
B. 𝑎 = 𝑁𝐻2 𝑁𝐻2(𝑎𝑞) ; 𝑏 = 𝑁2 𝑂(𝑔) ; 𝑐 = 𝐻𝑁𝑂3(𝑎𝑞)
C. 𝑎 = 𝑁𝐻4 𝑂𝐻(𝑎𝑞) ; 𝑏 = 𝑁2 𝑂(𝑔) ; 𝑐 = 𝐻𝑁𝑂3(𝑎𝑞)
D. 𝑎 = 𝑁𝐻3(𝑔) ; 𝑏 = 𝑁𝑂(𝑔) ; 𝑐 = 𝐻𝑁𝑂3(𝑎𝑞)
35. The chemical formula of stannite ion is ……
A. 𝑆𝑛(𝑂𝐻)4 2−
B. 𝑆𝑟(𝑂𝐻)2 −
C. 𝑆𝑛(𝑂𝐻)6 2−
D. 𝑆𝑟(𝑂𝐻)4 2−
36. Which of the following bonds would be best categorized as covalent?
I. H-S II. Al-S
III. N-F
A. I only
B. II only
C. III only
D. I and III
37. Which of the following BEST describes the bonding found within solid Al2O3?
A. Strong covalent bonds between atoms with similar electronegativities
B. Covalently bound atoms arranged in small individual molecules.
C. Electrostatic attractions between + and - charged ions
D. Positively charged ions covalently bound with many mobile electrons
38. Which of the following BEST explains the relatively low melting point of covalent molecular
substances?
A. Covalent molecular materials rely on weak electrostatic forces holding the ions together.
B. The similar electronegativity of the atoms cause repulsions between the molecules
C. The intermolecular forces between the molecules are weak compared to ionic or covalent
bonds.
D. The metals involved create uneven bonding with the non-metals
39. Which of the following would be characterized as a molecular compound?
I. CO
II. Zn(OH)2
III. Fe
A. I, II and III
B. II only
C. III only
D. I and II
40. Which of the following would contain both covalent and ionic bonding?
A. CaO
B. NH3
C. CO2
D. Ca(NO3)2
41. Rank the following bonds from most to least covalent in nature: (C-H, C-O, C-C, Al-O)
A. C-H , C-O, Al-O, C-C
B. C-O, C-H, C-C, Al-O
C. C-C, C-H,
Al-O, C-O
24
D. Al-O, C-O, C-H, C-C
42. Which of the following would be nitrogen(I)oxide?
A. NO
B. NO2
C. N2O
D. N2O3
43. Which of the following is named INCORRECTLY?
I. CO - carbon(II)oxide
II. OF2 - diflourine oxide
III. H3P - trihydrogen phosphide
A. I only
B. II only
C. III only
D. I and II
44. There are __________ paired and __________ unpaired electrons in the Lewis symbol for a
Nitrogen atom.
A. 4, 2
B. 2, 4
C. 1, 3
D. 4, 3
45. In the Lewis symbol for a sulfur atom, there are __________ paired and __________
unpaired electrons.
A. 2, 2
B. 4, 2
C. 2, 4
D. 0, 6
46. Which of the following would have all of it’s valance electrons paired in it’s lewis structure
representation?
A. Al
B. P
C. S
D. Ar
47. As the number of covalent bonds between two atoms increases, the distance between the
atoms __________ and the strength of the bond between them __________.
A. increases, increases
B. decreases, decreases
C. increases, decreases
D. decreases, increases
48. In which of the molecules below is the carbon-carbon distance the shortest?
A. H2C = CH2
B. H -- C ≡ C -- H
C. H3C – CH3
D. H2C = C =
CH2
49. Among the bonds C – N, C = N, C ≡ N, the C – N bond is __________.
A. strongest/shortest
B. strongest/longest
C. weakest/shortest D.
weakest/longest
50. The ion ICl4- has __________ valence electrons.
A. 34
B. 35
C. 36
D. 8
51. The Lewis structure of PF3 shows that the central phosphorus atom has __________
nonbonding and __________ bonding electron pairs.
A. 2, 2
B. 1, 3
C. 3, 1
D. 1, 2
52. A valid Lewis structure of __________ cannot be drawn without violating the octet rule.
A. PO43B. PF3
C. CCl4
D. SeF4
53. The central atom in __________ does not violate the octet rule.
A. SF4
B. KrF2
C. CF4
D. XeF4
54. Which of the following correctly represents the Lewis structure for PH3?
A.
B.
C.
D.
55. Which of the following would be the correct Lewis structure for methyl amine (CH3NH2)?
25
A.
B.
C.
D.
56. How many equivalent resonance forms can be drawn for CO32- (carbon is the central atom)?
A. 1
B. 2
C. 3
D. 4
57. How many equivalent resonance structures can be drawn for the molecule of SO3 without
having to violate the octet rule on the sulfur atom?
A. 3
B. 2
C. 1
D. 4
58. In the nitrite ion NO2 , __________.
A. both bonds are single bonds
B. both bonds are double bonds
C. one bond is a double bond and the other is a single bond
D. both bonds
are the same
59. Which of the following is true about resonance forms of a molecule or ion, __________.
A. one always corresponds to the observed structure
B. all the resonance structures are observed in various proportions
C. the observed structure is an average of the resonance forms
D. the same atoms need not be bonded to each other in all resonance forms
60. According to VSEPR theory, if there are five electron domains in the valence shell of an
atom, they will be arranged in a(n) __________ geometry.
A. octahedral
B. trigonal bipyramidal
C. tetrahedral
D. trigonal planar
61. The electron-domain geometry of the central atom in BrF3 is _______, while the molecular
geometry would be described as____________.
A. linear, linear
B. trigonal planar, trigonal planar
C. tetrahedral, triangular
pyramidal
D. trigonal bipyramidal, T shaped
62. PCl5 has __________ electron domains and a __________ molecular arrangement.
A. 6, trigonal bipyramidal
B. 6, tetrahedral
C. 5, square pyramidal
D. 5, trigonal
bipyramidal
63. The molecular geometry of the SiH2Cl2 molecule is __________.
A. trigonal planar
B. tetrahedral
C. trigonal pyramidal
D. octahedral
64. Electronegativity __________ from left to right within a period and __________ from top to
bottom within a group.
A. decreases, increases
B. increases, increases
C. increases, decreases D. stays the
same, increases
65. Which of the following has the bonds correctly arranged in order of increasing polarity?
A. Be — F, Mg — F, N — F, O — F
B. Mg — F, Be — F, N — F, O — F
C. O— F, Be — F, Mg — F, N — F
D. N — F, Be — F, Mg — F, O — F
66. The molecular geometry of the BCl3 molecule is __________, and this molecule is
__________.
26
A. trigonal pyramidal, polar B. trigonal pyramidal, nonpolar C. trigonal planar, polar
D. trigonal planar, nonpolar
67. Which of the following BEST describes the bonding found within solid Al2O3?
A. Strong covalent bonds between atoms with similar electronegativities
B. Covalently bound atoms arranged in small individual molecules.
C. Electrostatic attractions between + and - charged ions
D. Positively charged ions covalently bound with many mobile electrons
68. Which of the following is a correct Lewis structure for oxygen?
A.
B.
C.
D.
69. What is the formal charge on each atom in dichloromethane, CH2Cl2?
A. C = 0, H = 0, Cl = 0
B. C = 0, H = -1, Cl = +1 C. C = 0, H = +1, Cl = -1
D. C = -2, H = +1, Cl = +1
70. Using formal charges and the octet rule, determine which Lewis structure of OCN- is most
stable.
A.
B.
C.
D.
COVENANT UNIVERSITY
27
CANAANLAND, KM 10, IDIROKO ROAD
P.M.B 1023, OTA, OGUN STATE, NIGERIA
TITLE OF EXAMINATION: B.Sc. Degree Examination
COLLEGE: Science & Technology
DEPARTMENT: Chemistry
SESSION: 2015/2016
SEMESTER: Omega
COURSE CODE: CHM 122
COURSE TITLE: GENERAL INORGANIC
CHEMISTRY
ANSWERS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
C
C
B
A
B
D
D
C
A
D
A
C
B
B
D
B
C
A
B
A
D
B
C
A
A
A
B
C
C
D
B
D
A
A
C
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
B
C
D
C
A
D
A
B
C
B
C
D
A
C
D
C
C
A
D
C
D
C
B
C
B
C
D
D
B
A
D
C
D
A
D
28
29