Question Library

Browse, filter, and study verified past examination questions with step-by-step mathematical reasoning.

Launch Interactive Practice
Searching 18,000+ Questions... Sifting topics, KaTeX formulas & verified solutions
Showing 5491–5505 of 14893 verified questions
Sort by:
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
Chemistry UTME / JAMB 2011 Chemical Energetics & Thermochemistry
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 Electrolysis & Electrochemical Cells
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 Stoichiometry, Mole Concept & Volumetric Analysis
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 Stoichiometry, Mole Concept & Volumetric Analysis
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 Stoichiometry, Mole Concept & Volumetric Analysis
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 Non-Metals & Their Compounds
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 Non-Metals & Their Compounds
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 Stoichiometry, Mole Concept & Volumetric Analysis
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
Page 367 of 993