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At a given temperature and pressure, a gas X diffuses twice as fast as gas Y. It follows that
- A. Gas Y is two times as heavy as Gas X
- B. Gas Y is four times as heavy as Gas X
- C. Gas Y is monoatomic
- D. Gas X is diatomic
The constituents of Alnico are Aluminium, Nickel and
- A. Mg
- B. Co
- C. Mn
- D. Cu
3
The constituent of petroleum fraction used in surfacing road is
- A. petrol
- B. diesel
- C. lubricating oil
- D. bitumen
4
During the fractional distillation of crude oil, the fraction that distills at 200 – 250 C is
- A. bitumen
- B. diesel
- C. kerosene
- D. petrol
A liquid hydrocarbon obtained from fractional distillation of coal tar that is used in the pharmaceutical industry is
- A. xylene
- B. benzene
- C. hexane
- D. Toluene
The empirical formula of an organic liquid hydrocarbon is XY. If the relative molar masses of X and Y are 72 and 6 respectively, it’s vapour density is likely to be
- A. 33
- B. 66
- C. 39
- D. 78
7
Biuret test is a chemical test used for detecting the presence of
- A. carbohydrates
- B. proteins
- C. amines
- D. alkanoates
8
A gas when mixed with oxygen, it produces a very hot and early controllable flame. What is the name of the flame and where is it used?
- A. Acetylene flame; miners’ lamb
- B. Oxy-ethylene ; hunters’ torch
- C. Oxy-ethylene flame; miners’ lamb
- D. Oxy-ethylene flame ; cutting and welding metals
9
The number of geometrical isomers of butene are
- A. 2
- B. 3
- C. 5
- D. 4
10
When a few drops of Millon reagents is added to egg-white solution in a test tube, the white precipitate changes to
- A. orange
- B. brick red
- C. reddish brown
- D. blue
11
The quantity of electricity required to deposit 180g of Ag from a molten silver trioxonitrate(V) is
[Ag = 108]
- A. 1.08F
- B. 3.30F
- C. 1.67F
- D. 1.80F
12
What would be the order of the electrolytic cell in an industry intending the production of silver plated spoons?
- A. Cathode is the spoon; anode is a silver rod; electrolyte is a soluble silver salt
- B. Cathode is a silver rod; anode is the spoon; electrolyte is a soluble silver salt
- C. Cathode is the spoon; anode is any rod; electrolyte is a soluble silver salt
- D. Cathode is any rod; anode is the spoon; electrolyte is a soluble salt
The table above shows the formulae of some ions. In which of these compounds is the formula not correct?
- A. Aluminiumtetraoxosulphate(VI), Al
(SO)
- B. Calciumtrioxonitrate(V), Ca(NO
)
- C. Iron(III)bromide, Fe
- Br
- D. Potassiumsulphide, K
- S
For chemical reaction to be spontaneous, ∆G must be
- A. positive
- B. negative
- C. zero
- D. equal to the enthalpy change
Strong acids can be distinguished from weak acids by any of the following methods, EXCEPT
- A. Conductivity measurement
- B. The use of litmus paper
- C. Measurement of pH
- D. Measurement of heat of reaction
16
How many moles of CO𝟸
are produced when ethanol is burnt with 6g of oxygen
A. 0.125
B. 0.250
C. 0.375
D. 0.750
17
Which of these is the most preferred separation technique for the isolation of solutes where the purity of the constituent is of utmost importance?
- A. sieving
- B. Distillation
- C. recrystallization
- D. Precipitation
In the graph above, y represents
- A. endothermic reaction
- B. activation energy
- C. exothermic reaction
- D. ionization energy
19
One of the following is not a water pollutant?
- A. Inorganic fertilizers
- B. Warm water affluent
- C. Oxygen gas
- D. Biodegradable waste
20
What method is suitable for the separation of gases present in air?
- A. Catalytic cracking of liquid air
- B. Fractional distillation of liquid air
- C. Thermal decomposition of air
- D. Catalytic decomposition of air
21
The principle which states that no two electrons in the same orbitals of an atom have same value for all four quantum numbers is the
- A. Aufbau principle
- B. Hund’s rule
- C. Pauli Exclusion principle
- D. Dilution principle
22
How much of 5g of radioactive element whose half life is 50days remains after 200days?
- A. 2.50 g
- B. 1.25 g
- C. 0.63 g
- D. 0.31 g
The group VIII elements are the inert gases because they
- A. have lone pair of electrons on their valence shells
- B. all have completely filled valence shells
- C. are all solids
- D. are all polyatomic molecules
24
The highest isotope of hydrogen is
- A. Deuterium
- B. protium
- C. tritium
- D. positron
When Sulphur(IV)oxide is passed into solution of acidified tetraoxomanganate(VII), the colour changes from
- A. blue to green
- B. pink to yellow
- C. purple to colourless
- D. Orange to green
26
Water gas obtained from the gasification of coke is made up of
- A. Nitrogen and Carbon(II) oxide
- B. Nitrogen and Hydrogen
- C. Hydrogen and Carbon(II) oxide
- D. Carbon(II)oxide and Carbon(IV)oxide
Sulphur(IV)oxide can be used as a
- A. coating agent
- B. dehydrating agent
- C. refrigerant
- D. drying agent
28
The molecular formular of a hydrocarbon with an empirical formula of CH
and a molar mass of 30 is
- A. C
H
- B. C
H
- C. C
H
- D. C
H
The difference in molecular mass between an alkene and alkyne with six carbon per mole is
- A. 10
- B. 12
- C. 2
- D. 14
| COMPOUND | S | T | U | V | W |
| FORMULA | ROR’ | RCOOH’ | RCOR’ | ROH’ | RCOOR’ |
From the table above, which of these two compounds can form functional group isomers?
- A. S and T
- B. T and U
- C. S and V
- D. T and V
31
Fats and oils are esters of fatty organic acids combined with a trihydric alkanol commonly referred to as
- A. ethanol
- B. methanol
- C. glycol
- D. glycerol
32
Alkanoates are naturally found in
- A. lipids
- B. vitamins
- C. proteins
- D. rubbers
33
The composition of alloy permalloy is iron and
- A. copper
- B. nickel
- C. lead
- D. magnesium
34
The IUPAC nomenclature of the compound above is
- A. propan-1-ol
- B. butan-1-ol
- C. 2-methyl propan-1-ol
- D. 2-methyl propan-2-ol
35
What is formed when metal reacts with acid to liberate gas?
- A. Salt
- B. Base
- C. Acid
- D. Liquid
Concentrated sodium chloride solution is electrolyzed using mercury cathode and graphite anode. The products at the anode and the cathode respectively are
- A. hydrogen and chlorine
- B. chlorine and hydrogen
- C. chlorine and sodium
- D. sodium and chlorine
A factor that does not affect the rate of a chemical reaction is
- A. surface area
- B. temperature
- C. volume
- D. catalyst
38
In contact process, the catalyst used in the conversion of sulphur(IV)oxide to sulphur(VI) oxide is
- A. nickel
- B. platinum
- C. vanadium(V)oxide
- D. magnesium(IV)oxide
The element which can combine with oxygen to form an acid anhydride of the form XO
is
- A. phosphorus
- B. Chlorine
- C. fluorine
- D. sulphur
40
Rust on the surface of a metal sheet contains
- A. hydrated iron(II)oxide
- B. hydrated iron(III)oxide
- C. iron(III)hydroxide
- D. iron(III) trioxocarbonate(IV)
A gas that turns lime water milky is likely to be from
- A. Trioxocarbonate(IV)
- B. Chloride
- C. Trioxonitrate(V)
- D. Tetraoxosulphate(VI)
When n = 3, the quantum number of an element is
- A. 3
- B. 9
- C. 18
- D. 21
43
The salt formed when strong acid reacts with strong base is
- A. normal
- B. double
- C. complex
- D. basic
The shape of the molecule of Carbon(IV) oxide is
- A. tetrahedral
- B. pyramidal
- C. plannar
- D. linear
45
Calculate the mass of Magnesium that will be liberated from its salt by the same quantity of electricity that liberated 16.0 g of Silver.
[Mg = 24.0, Ag = 108 ]
- A. 3.65 g
- B. 3.56 g
- C. 1.87 g
- D. 1.78 g
46
Fog is a colloid in which
- A. liquid particles is dispersed in a gas medium
- B. gas particles dispersed in a liquid medium
- C. solid particles dispersed in a gas medium
- D. gas particles dispersed in a solid medium
47
The scientist that performed the experiment on discharged tubes that led to the discovery of the cathode rays as a sub-atomic particle is
- A. J.J Thomson
- B. Robert Millikan
- C. Ernest Rutherford
- D. Niels Bohr
In the treatment of water for municipal supply, chlorine is used to
- A. prevent tooth decay
- B. prevent goitre
- C. kill germs
- D. remove colour or odour
49
A major effect of oil pollution in coastal water is
- A. destruction of aquatic life
- B. nitrification of the water body
- C. detoxification of water
- D. disinfection of the water body
50
The substance that reacts with sodium to form alkali and changes white anhydrous copper(II) tetraoxosulphate (VI) to blue is
- A. base
- B. acid
- C. water
- D. solvent
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