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Chemistry UTME / JAMB 2011 Reaction Rates & Chemical Equilibrium
N2O4(g) ↔ 2NO2(g) ΔH = +ve In the reaction above, an increase in temperature will
A
increase the value of the equilibrium constant
B
decreases the value of the equilibrium constant
C
increase in the reactant production
D
shift the equilibrium to the left
medium Difficulty
Chemistry UTME / JAMB 2011 Atomic Structure, Orbitals & Nuclear Chemistry
An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contain is
A
16
B
15
C
46
D
31
medium Difficulty
Chemistry UTME / JAMB 2011 Chemical Bonding & Intermolecular Forces
The molecular lattice of iodine is held together by
A
dative bond
B
metallic bond
C
hydrogen bond
D
van der Waal's forces
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
The arrangement of particles in crystal lattices can be studied using
A
X - rays
B
γ - rays
C
α - rays
D
β - rays
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
From the diagram above, find the amount of solute deposited when 200 cm\(^3\) of the solution is cooled from 55^\circC to 40^\circC.
Attached Figure / Diagram
Question diagram
A
0.10 mole
B
0.20mole
C
0.01 mole
D
0.02 mole
medium Difficulty
Chemistry UTME / JAMB 2011 Water, Solutions & Solubility
The importance of sodium aluminate (III) in the treatment of water is to
A
cause coagulation
B
neutralize acidity
C
prevent goitre and tooth decay
D
kill germs
medium Difficulty
Chemistry UTME / JAMB 2011 Acids, Bases, pH & Salts
CH3COOH(aq) + OH-(aq) ↔ CH3COO-(aq) + H2O(l) In the reaction above ,CH3COO-(aq) is
A
conjugate base
B
acid
C
base
D
conjugate acid
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?
A
3
B
4
C
1
D
2
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following is NOT an alkali?
A
NH3
B
Mg(OH)2
C
Ca(OH)2
D
NaOH
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
An effect of thermal pollution on water bodies is that the
A
volume of water reduces
B
volume of chemical waste increase
C
level of oxides of nitrogen increase
D
level of oxygen reduces
medium Difficulty
Chemistry UTME / JAMB 2011 Stoichiometry, Mole Concept & Volumetric Analysis
MnO-4(aq) + Y + 5Fe2+(aq) → Mn2+(aq) + 5Fe2+(aq) + 4H2O(l) In the equation above, Y is
A
5H+(aq)
B
4H+(aq)
C
10H+(aq)
D
8H+(aq)
medium Difficulty
Chemistry UTME / JAMB 2011 Electrolysis & Electrochemical Cells
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 Non-Metals & Their Compounds
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 Stoichiometry, Mole Concept & Volumetric Analysis
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 Stoichiometry, Mole Concept & Volumetric Analysis
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
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