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Chemistry UTME / JAMB 2011 Stoichiometry & Mole Concept
Given that M is the mass of a substance deposited during electrolysis and Q is the quantity of electricity consumed, then Faraday's first law can be written as [Electrochemical equivalent]
A
M = E/Q
B
M = EQ
C
M = Q/E
D
M = E/2Q
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The impurities formed during the laboratory preparation of chlorine gas are removed by
A
H2O
B
NH3
C
H2SO4
D
HCl
medium Difficulty
Chemistry UTME / JAMB 2011 Acids, Bases, and Salts
The effect of the presence of impurities such as carbon and sulphur on iron is that they
A
give it high tensile strenght
B
make it malleable and ductile
C
increase its melting point
D
lower its melting point
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
A few drops of concentrated HNO\(_3\) is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation present is likely to be
A
Pb2+
B
Cu2+
C
Fe3+
D
Fe2+
medium Difficulty
Chemistry UTME / JAMB 2011 Kinetics, Energetics and Equilibrium
A chemical reaction which the hydration energy is greater than the lattice energy is referred to as
A
a spontaneous reaction
B
an endothermic reaction
C
an exothermic reaction
D
a reversible reaction
medium Difficulty
Chemistry UTME / JAMB 2011 Atomic Structure and Periodic Table
The function of zinc electrode in a galvanic cells is that it
A
undergoes reduction
B
serves as the positive electrode
C
production of electons
D
uses up electrons
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
CH4(g) + Cl2(g) → CH3 Cl(s) + HCl(g) The major factor that influence the rate of the reaction above is
A
catalyst
B
temperature
C
concentration
D
light
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The condition required for corrosion to take place is the presence of
A
water and carbon (IV) oxide
B
water, carbon (IV) oxide and oxygen
C
oxygen and carbon (IV) oxide
D
water and oxygen
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The diagram above best illustrates the effect of decrease in
Attached Figure / Diagram
Question diagram
A
concentration
B
temperature
C
surface area
D
pressure
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The bleaching action of chlorine gas is effective due to the presence of
A
hydrogen chloride
B
water
C
air
D
oxygen
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
In the laboratory preparation of oxygen, dried oxygen is usually collected over
A
hydrochloric acid
B
mercury
C
calcium chloride
D
tetraoxosulphate (VI) acid
medium Difficulty
Chemistry UTME / JAMB 2011 Acids, Bases, and Salts
The property of concentrated H2SO4 that makes it suitable for preparing HNO3 is its
A
boiling point
B
density
C
oxidizing properties
D
dehydrating properties
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
Bronze is preferred to copper in the making of medals because it
A
is stronger
B
can withstand low temperature
C
is lighter
D
has low tensile strength
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The constituents of baking powder that makes the dough to rise is
A
NaHCO3
B
NaOH
C
Na2CO3
D
NaCl
medium Difficulty
Chemistry UTME / JAMB 2011 Matter & Separation Techniques
The ability of carbon to form long chains is referred to as
A
alkylation
B
acylation
C
catenation
D
carbonation
medium Difficulty
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