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Chemistry
UTME / JAMB 1995
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
An example of a secondary amine is?
A
propylene
B
di-butylamine
C
methylamine
D
trimethylamine
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 #13701)
Chemistry
UTME / JAMB 1995
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
The relatively high boiling points of alkanols are due to?
A
ionic bonding
B
aromatic character
C
covalent bonding
D
hydrogen bonding
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 #13703)
Chemistry
UTME / JAMB 1995
Periodic Table & Periodicity
Diagram
Solution
USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which of the indicate an alkali metal and a noble gas respectively?
Attached Figure / Diagram
A
M and E
B
G and E
C
R and L
D
G and L
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
The alkali metals are found in group one while the noble gases are found in group zero or eight of the periodic table, therefore G and L belong to groups one and eight respectively.
Source: Myschool Past Questions Archive (Record #31520)
Chemistry
UTME / JAMB 1995
Periodic Table & Periodicity
Diagram
USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which letter represents a non-metal that is a solid at room temperature?
Attached Figure / Diagram
A
T
B
R
C
J
D
X
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 #31521)
Chemistry
UTME / JAMB 1995
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
Solution
The arrangement above can be used for the collection of
Attached Figure / Diagram
A
sulphur (IV) oxide
B
ammonia
C
hydrogen chloride
D
nitrogen
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
This apparatus can be seen either in the preparation of Nitrogen gas from AIR or from the reduction of Copper(II) Oxide by Ammonia in which Nitrogen gas is collected in the gas jar over water.
Reaction Equation:
\(3CuO_{(s)} + 2NH_{{3}{(g)}} \to 3Cu_{(s)} + 3H_{2}O_{(l)} + N_{{2}{(g)}}\)
Source: Myschool Past Questions Archive (Record #31523)
Chemistry
UTME / JAMB 1995
Reaction Rates & Chemical Equilibrium
Diagram
Solution
Use the diagram above to answer this question. The activation energy of the uncatalysed reaction is
Attached Figure / Diagram
A
X
B
X + Y
C
X - Y
D
Y
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Activation energy is the minimum amount of energy required for a chemical reaction to occur. Graphically, it is the difference between the peak of the hump and the reactant energy.
Consequently, the correct answer is option A.
Source: Myschool Past Questions Archive (Record #31525)
Chemistry
UTME / JAMB 1995
Reaction Rates & Chemical Equilibrium
Diagram
Solution
It can be deduced that the rate of the reaction?
Attached Figure / Diagram
A
for path l is higher than path ll
B
for path ll is higher than path l
C
is the same for both paths at all temperatures
D
depends on the values of both x and y at all pressures
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
A catalyst does affect the rate of a chemical reaction, generally by increasing it, by providing an alternative reaction pathway with a lower activation energy.
Path II is actually a catalysed reaction while path I is uncatalysed. Thus, the rate of reaction in path II is higher than path I.
Source: Myschool Past Questions Archive (Record #31526)
Chemistry
UTME / JAMB 1995
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The functional group represented in the compound above is?
A
alkanol
B
alkanal
C
alkanone
D
alanoate
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
The carbonyl group in tha alkanal (aldehyde) family is always at the end of a carbon chain
Source: Official Exam / Past Question Archive
Chemistry
WAEC / WASSCE 1995
Organic Chemistry I: Hydrocarbons & Crude Oil
If a solid has a low melting point and dissolves readily in benzene, it would probably
A
contain strong electrostatic forces of attraction
B
conduct electricity in the molten state
C
dissolve in water
D
have covalent bonding
E
absorb moisture on exposure to air
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 #36380)
Chemistry
WAEC / WASSCE 1995
Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following molecules is linear in shape?
A
CH4
B
H2O
C
NH3
D
H2S
E
CI2
medium Difficulty
Verified Correct Answer: Option E
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #36384)
Chemistry
WAEC / WASSCE 1995
Metals, Transition Elements & Extraction
Which of the following cannot be deduced from the electronic configuration of a transition metal?
A
Possession of magnetic property
B
Ability to form complex ions
C
Position in the Periodic Table
D
Variable oxidation states
E
Physical properties of the metal
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 #36385)
Chemistry
WAEC / WASSCE 1995
Stoichiometry, Mole Concept & Volumetric Analysis
What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]
A
88.9%
B
80.0%
C
66.7%
D
20.0%
E
11.1%
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 #36387)
Chemistry
WAEC / WASSCE 1995
Acids, Bases, pH & Salts
Solution
A weak acid is one which
A
is not corrosive
B
is slightly ionized in water
C
does not produce salts with alkalis
D
does not conduct an electric current in aqueous solution
E
forms acid salts with bases
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
A weak acid is a chemical compound that only partially dissociates (splits into ions) when dissolved in water, meaning it doesn't release all its hydrogen ions into the solution, unlike a strong acid which fully ionizes; common examples of weak acids include acetic acid (found in vinegar) and formic acid.
Source: Myschool Past Questions Archive (Record #36388)
Chemistry
WAEC / WASSCE 1995
Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following species is always present in acidified water?
A
NH+4
B
O 2-
C
HCI
D
H3O+
E
HNO3
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 #36389)
Chemistry
WAEC / WASSCE 1995
Stoichiometry, Mole Concept & Volumetric Analysis
The most suitable method for preparing lead (ll) chloride is by
A
action of dilute HCI on PbSO 4
B
acts of dilute HCI on lead
C
action of dilute HCI on PbCO3
D
bubbling chlorine into a solution of Pb(NO3)2
E
mixing aqueous solutions Pb(NO3)2 and NaCI.
medium Difficulty
Verified Correct Answer: Option E
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #36390)