What accounts for the low melting and boiling points of covalent molecules?
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(A)
They have weak intermolecular forces
25
Iron produced directly from a blast furnace is
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(C)
pig iron
26
What is the molecular mass of an alkanoic acid, if 0.5 mole of the acid weighs 44g?
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(B)
88
27
Alkenes are represented with the general molecular formula
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(A)
C\(_n\)H\(_{2n}\)
28
The major product when 2-methylpropene reacts with HCl is
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(A)
2-chloro, 2-methylpropane
29
In the laboratory preparation of Chlorine, the gas is passed through a wash bottle of water to
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(B)
absorb HCl gas
30
Carbohydrates can generally be represented by the general formula C\(_x\)(H\(_2\)O)\(_y\), for fructose the value for "X" is
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(D)
6
31
If a gold bar and a silver bar are tied together firmly and left for years, some of the gold particles will be found in the silver bar due to
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(B)
diffusion
32
A metal that can be found in the free state in nature is
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(A)
silver
33
Which of the following has the highest boiling point?
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(D)
CH\(_3\)CH\(_2\)CH\(_2\)OH
34
From the graph, it can be inferred that
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(D)
solubility of Y increases steadily as temperature increases
35
The gas that is commonly used to demonstrate the fountain experiment is
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(A)
hydrogen chloride
36
Which of the following statements is false about hard water?
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(B)
Cannot be supplied in pipes made of leads
37
The empirical mass of C\(_6\)H\(_{12}\)O\(_6\) is
[H =1, C = 12, O = 16]
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(D)
30
38
The nitrogenous compound in dead materials in the soil is converted to
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(A)
ammonia
39
CH\(_3\)C ≡ CCH(CH\(_3\))\(_2\)
The IUPAC nomenclature of the compound above is
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(B)
4-methylpent-2-yne
40
In the laboratory preparation of oxygen using potassium trioxochlorate(V), tetraoxomanganate (VII), usually not recommended in modern laboratory because
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(A)
it forms explosive mixture with carbonaceous materials
41
The type of bond between copper(II) tetraamine and chlorine in [Cu(NH\(_3\))\(_4\)]Cl\(_2\)
In the reaction above, magnesium is a reducing agent because
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(A)
oxidized
43
An example of a physical change is
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(C)
dissolving sodium chloride in water
44
When a sample of air is passed through alkaline pyrogalol, potash and finally through U-tube containing fused calcium chloride, the components of air left unabsorbed are
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(C)
noble gases and nitrogen
45
An atom of element with the configuration 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^5\) is likely to belong to
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(A)
group 7
46
A molecule with a polar covalent bond between atoms exhibits
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(A)
unequal sharing of electron pair
47
Mg + Pb\(^{2+}\) → Mg\(^{2+}\) + Pb
What is the cell notation for the cell reaction above?
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(C)
MgIMg\(^{2+}\)IIPb\(^{2+}\)IPb
48
The correct arrangement of gases in the order of increasing rate of diffusion is
[H = 1, C = 12, N = 14, O = 16, S = 32]
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(B)
SO\(_2\), O\(_2\), NH\(_3\), H\(_2\)
49
In a series of solutions with pH of 2.5, 3.5, 7.0 and 8.0, which is likely to turn red moist litmus paper blue?
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(B)
8.0
50
The process by which iron corrodes is
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(A)
rusting
51
On heating 12.5g of saturated solution to dryness at 60\(^0\)C, 2g of anhydrous salt was recovered, calculate its solubility in grams per 100g of water.
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(D)
20.0
52
The reaction above is
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(B)
substitution
53
The gas produced at the cathode during electrolysis of brine is
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(D)
hydrogen
54
An example of a salt that can dissolve in water to form a solution with a pH of 7.
From the condensed structure above, the reactants are
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(D)
propanoic acid and ethanol
58
The stainless steel alloy is used for making
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(A)
cutlery
59
The gas that ammoniacal solution of CuCl\(_2\) is used to absorb from producer or water gas is
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(B)
CO
60
The liquid state of water at room temperature is as a result of
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(D)
hydrogen bond
61
The process that illustrates reformation of petroleum product is
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(B)
cyclohexane to benzene
62
The source of carbon(II)oxide that acts as air pollutant is
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(C)
combustion of fuel
63
If there is no change in volume in a gaseous reaction, the pressure will
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(C)
have no effect on equilibrium position
64
The IUPAC nomenclature of the compound above is
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(C)
ethyl propanoate
65
If 5g of Iron filling was reacted with excess dilute H\(_2\)SO\(_4\) to evolve hydrogen gas, which came to completion after 10 min, calculate the rate of reaction in g/hr.
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(B)
30
66
The evaluation of petrol from crude oil before it is put on sale is to prevent
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(A)
pinking
67
The metal used as a packaging material is
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(A)
Al
68
The expression above represents
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(C)
General gas law
69
The basicity of C\(_2\)H\(_2\)O\(_4\) is
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(C)
2
70
Enzymatic conversion of glucose to ethanol is
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(C)
fermentation
71
Gold does not require extraction because it is
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(C)
free in nature
72
The process employed in the industrial preparation of tetraoxosulphate(VI) acid is
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(A)
Contact
73
The catalytic hydrogenation of benzene produces
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(D)
cyclohexane
74
A by-product of the alkaline hydrolysis of tristearin is a
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(D)
trihydric alkanol
75
2SO\(_2\)\(_{(s)}\) + O\(_2\)\(_{(s)}\) ⇌ 2SO\(_3\) ; ΔG° = - ve
For the above reaction to be feasible
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(A)
ΔH = + ve ,ΔS = + ve
76
Sodium in the above reaction is produced by
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(C)
Downs process
77
The use of CFCs as a blowing agent has application in
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(A)
foam industry
78
The metal that will liberate H\(_2\) gas from dilute HNO\(_3\) is
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(B)
Mg
79
Atom with the electron configuration of 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\) belongs to
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(C)
Group 2 and Period 3
80
The relative molecular mass of an alkanoic acid with the empirical formula of CH\(_2\)O is
[ H = 1, C = 12, O = 16 ]
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(C)
60
81
Commercial deodorant is an example of a colloid called
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(A)
aerosol
82
Calculate the time required to liberate 9g of Aluminium metal, when a current of 18A is passed through it.
(1F = 96500C , Al = 27)
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(B)
89.34 minutes
83
What is the function of concentrated H\(_2\)SO\(_4\)?
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(B)
It is a dehydrating agent
84
In oxidation reactions, electrons are
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(B)
removed
85
(CH\(_3\))\(_2\)CHCH(OH)CH\(_2\)C(CH\(_3\))\(_3\)
The IUPAC name of the compound above is
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(A)
2,5,5-trimethylhexan-3-ol
86
Anti-freeze used in a vehicle radiator is a mixture of water and
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(A)
propanetriol
87
Magnesium tetraoxosulphate(VI) salt is commonly used as a
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(D)
laxative
88
The constituents of permalloy are Iron and
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(A)
Nickel
89
An inflated balloon shrinks when placed in a freezer because the
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(C)
gas motion reduces and exert less pressure
90
The compound in which the oxidation state of nitrogen is + 3 is
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(B)
N\(_2\)O\(_3\)
91
Na\(_2\)X ⇌ 2Na\(^+\) + X\(^{2-}\)
The bond between Na and X is likely to be
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(B)
ionic
92
The compound responsible for the pleasant scent of fruits and perfumes belongs to the class of
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(D)
alkanoate
93
The most suitable indicator to be used when reacting ethanedioic acid with potassium hydroxide is
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(A)
phenolphthalein
94
Electron configuration of Chlorine atom is
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(A)
1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^5\)
95
A table in which metals are arranged in series according to their comparative tendencies to give up their valence electrons is
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(B)
electrochemical series
96
An importance of solubility is that it
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(A)
determines the amount of solute that can dissolve in a given amount of solvent
97
The disintegration of radioactive phosphorus to silicon follows the first order kinetics with rate constant k\(_1\) = 3.85 x 10\(^{-3}\). Determine the half life of phosphorus.
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(B)
180 s
98
The above structure is
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(C)
alkanamide
99
The fractions of crude oil are best separated by
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(D)
fractional distillation
100
In the equation above, the expression for the equilibrium constant, k\(_c\) is
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(D)
\(\frac{[X_2][Y_2]^3}{[XY_3]^2}\)
101
How many molecules are there in 4.0 moles of glucose?
[Avogadro's number = 6.02 x 10\(^{23}\)]
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(B)
2.41 x 10\(^{24}\)
102
What is the product obtained at the anode in the electrolysis of concentrated sodium chloride using graphite electrode?
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(A)
Chlorine gas
103
Freons pollution in the air are released from
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(B)
aerosol can
104
In welding and cutting of metals, the organic gas commonly used in the heating process is
