The filter in the cigarette reduce the nicotine construct by
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(B)
adsorption
2
Which of these require crystallization most?
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(A)
Drug making
3
Iron is often galvanized in order to
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(C)
Protect it against corrosion
4
In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by
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(A)
washing under pressure
5
The gas that is most useful in protecting humans against solar marathon is
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(B)
ozone
6
Vulcanization involve the removal of
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(C)
the double bond
7
The acid in electrolysis of water is dilute
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(C)
H2SO4
8
A small quantity of solid ammonium chloride (NH4Cl) heated gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo
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(B)
sublimation
9
When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be
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(A)
efflorescence
10
Atomicity of ozone is
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(C)
3
11
Which of the noble gases has the greatest ionization energy
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(A)
He
12
The weakest attractive force that can be observed between two molecules is
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(D)
vander Waals
13
An elements used in production of matches is
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(D)
sulphur
14
Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays
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(D)
travel in straight lines
15
Flow of current in electrolytes is due to the movement of
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(C)
Ions
16
A suitable reagent for distinguish between ethanoic and ethanol is
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(C)
sodium hydrogen trioxocarbonate (iv)
17
The above orbital diagram shown the electronic configuration of
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(B)
nitrogen
18
Which of the following metals burns with brick red
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(B)
Ca
19
In the production of soap, concentrated sodium chloride solution is added to
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(B)
decrease the solubility of the soap
20
A liquid that will dissolve fat is
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(C)
kerosene
21
Tartaric acid is used industrially to
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(A)
make baking powder
22
P1V1 = P2V2 supports ?
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(B)
Boyles’s law
23
A fixed mass of gas occupies 92cm3 at 3°C. What will be its volume at 18C if the pressure remains constant?
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(D)
97.0cm3
24
Which of the following ions requires the largest quantity of electricity for discharge at an electrode?
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(A)
2.0 mole of Q3+
25
Hydrogen can be displaced from a hot alkaline solution by
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(D)
Sn
26
Which of the following types of alkanols undergo oxidation to produce alkanoic acids.
I. Primary alkanols
II. Secondary alkanols
III. Tertiary alkanols
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(D)
I only
27
Rare gases are stable because they
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(C)
have duplet or octet electronic configuration in the outermost shells in their atoms
28
A major source of oxide of nitrogen is from the burning of
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(C)
fuel
29
Which of these radioactive elements is commonly used as a nuclear fuel
In the above reaction, the oxidation number of Cu changes from ___ to _______?
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(A)
+1 to 0
32
The number of isomers formed by C6H14 is
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(B)
5
33
The basic particles from which matter could be made up of are as follow, except?
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(A)
Salt
34
The energy value of petrol can be determined by
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(A)
Bomb calorimeter
35
What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3 of 0.1moldm3 NaOH Solution?
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(A)
2.0cm3
36
A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)
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(C)
C6H12O6
37
An oxidation state of Cr in K2Cr2O7
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(B)
6
38
The elements that belong to the third period of periodic table are
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(D)
Na, Mg, S and Ar
39
When sugar is dissolve in tea, the reaction is accomplished by?
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(C)
no entropy change
40
NH3(g) + HCl(s) → NH 4Cl (s)
The entropy change in the system above is
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(C)
negative
41
Detergents are manufactured with straight hydrocarbon chains, is to make them
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(B)
biodegradable
42
Which of the following results in the fall of acid rain?
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(C)
oxides of sulphur
43
The furring of kettles is caused by the presence of what compound in water?
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(D)
calcium trioxocarbonate (IV)
44
A difference between chemical and physical change is that in a chemical change
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(D)
a new substance is formed
45
According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
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(D)
be zero
46
PCL5(g)= PCL3(g) + Cl2(g)
In the reaction above, a decrease in pressure will
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(B)
Increase yield of Pcl3
47
Which of the following gives a precipitation when treated with NaOH Solution?
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(A)
AlCl3
48
Electronic configuration of an element 13 in the subsidiary energy level is
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(A)
\( 1s^2 2s^2 2p^6 3s^2 3p^1 \)
49
Alloys are best prepared by
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(D)
cooking a molten of the metals
50
In countries where the temperature fall below 273k, salt always spilled on the road in order to
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(D)
reduce the freezing point of ice
51
The substance that is used in the steel industry for the removal of carbon. Sulphur and phosphorus impurities from pig iron is
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(A)
oxygen
52
If glucose is heated with concentrated tetraoxosulphate(vi)acid, it will be dehydrated to?
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(A)
carbon
53
Which of the following compounds can be represented by the molecular formula C2 H6O?
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(B)
ethanol
54
what is the pH of 0.00lmoldm3 solution of sodium hydroxide
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(D)
11
55
N2O4(g)→ 2NO2(g)
In the endothermic reaction above, more products formed will be favored by
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(C)
a decrease pressure
56
Chlorine gas turns damp starch-iodide paper
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(D)
dark blue
57
Chlorine consisting of two isotope of mass number 35 and 37 in the ratio 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotope of mass number 37
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(B)
25
58
The principal constituent of natural gas is
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(A)
methane
59
In the electrolysis of CuSo4(g) using platinum electrode the reaction at the anode is
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(B)
4OH= 4e- + 2H2O + O2
60
S block elements of the periodic table one made up of
