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Chemistry
UTME / JAMB 2011
Chemical Energetics & Thermochemistry
Solution
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
Verified Correct Answer: Option C
Chemical Principles & Mechanism
When the hydration energy is greater than the lattice energy, then it is exothermic.
Source: Myschool Past Questions Archive (Record #4780)
Chemistry
UTME / JAMB 2011
Electrolysis & Electrochemical Cells
Solution
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
Verified Correct Answer: Option C
Chemical Principles & Mechanism
If an external electrical conductor connects the copper and zinc electrodes, zinc from the zinc electrode dissolves into the solution as Zn2+ ions (oxidation), releasing electrons that enter the external conductor.
Source: Myschool Past Questions Archive (Record #4781)
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
Verified Correct Answer: Option D
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4782)
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
Verified Correct Answer: Option D
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4783)
Chemistry
UTME / JAMB 2011
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
The diagram above best illustrates the effect of decrease in
Attached Figure / Diagram
A
concentration
B
temperature
C
surface area
D
pressure
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4784)
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
Verified Correct Answer: Option B
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4790)
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
Verified Correct Answer: Option B
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4791)
Chemistry
UTME / JAMB 2011
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
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
Verified Correct Answer: Option A
Chemical Principles & Mechanism
\(H_2SO_4\) acid has a high boiling point of 388^\circC. Due to its high boiling point, it is considered a non-volatile acid, so when sulphuric acid is reacted with salts of nitric acid eg \(NaNO_3\), \(HNO_3\) is displaced from its salt
Source: Myschool Past Questions Archive (Record #4793)
Chemistry
UTME / JAMB 2011
Metals, Transition Elements & Extraction
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
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4794)
Chemistry
UTME / JAMB 2011
Stoichiometry, Mole Concept & Volumetric Analysis
The constituents of baking powder that makes the dough to rise is
A
NaHCO3
B
NaOH
C
Na2CO3
D
NaCl
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4795)
Chemistry
UTME / JAMB 2011
Stoichiometry, Mole Concept & Volumetric Analysis
The ability of carbon to form long chains is referred to as
A
alkylation
B
acylation
C
catenation
D
carbonation
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4796)
Chemistry
UTME / JAMB 2011
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Which of the following compounds will undergo polymerization reaction?
A
C2H4
B
C2H5COOH
C
C2H6
D
C2H5OH
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4797)
Chemistry
UTME / JAMB 2011
Stoichiometry, Mole Concept & Volumetric Analysis
An organic compound has an empirical formula CH2O and vapour density of 45.
What is the molecular formula?
[C = 12, H = 1, O = 16]
A
C3H7OH
B
C2H5OH
C
C3H6O3
D
C2H4O2
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4799)
Chemistry
UTME / JAMB 2011
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
At 25o and zymase as catalyst,
C6H126 → 2C2H5OH + 2CO2 + energy
The reaction above represented by the equation above is useful in the production of
A
propanol
B
butanol
C
methanol
D
ethanol
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4800)
Chemistry
UTME / JAMB 2011
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The number of isomers that can be obtained from C\(_4\)H\(_{10}\) is
A
3
B
4
C
1
D
2
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
The two structural isomers of C\(_4\)H\(_{10}\) are butane and 2-methylpropane. Butane, also known as n-butane, has a straight-chain structure, while 2-methylpropane, has a branched structure.
Source: Myschool Past Questions Archive (Record #4801)