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Chemistry
UTME / JAMB 1991
Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following are the products of the reaction between CH3COOH and CI2 in sunlight?
A
CICH2COOH + HCI
B
CH3COCI + HOCI
C
CH3COOCI + HCI
D
CH3COCI + HO2
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 #13115)
Chemistry
UTME / JAMB 1991
Acids, Bases, pH & Salts
Which of these is an acid salt?
A
K2SO4-.AI2(SO4)3.24H2O
B
CuCO3.Cu(OH)2
C
NaHS
D
CaOCI2-
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 #13166)
Chemistry
UTME / JAMB 1991
Acids, Bases, pH & Salts
Solution
The appropriate test paper to use in the above experiment is moist
A
litmus psper
B
potassium heptaoxodichromate (IV) paper
C
lead (ll) trioxonitrate (V) paper
D
universal indicator paper
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Hydrogen Sulphide can easily be identified by bringing a strip of filter paper soaked in Lead(II) ethanoate solution or Lead(II) nitrate(V) solution into the gas.
H\(_2\)S turns the paper dark brown or black. The change in colour is as a result of formation of precipitate of black lead(II) Sulphide.
Source: Official Exam / Past Question Archive
Chemistry
UTME / JAMB 1991
Chemical Bonding & Intermolecular Forces
Diagram
Solution
The electrons of two atoms Y and Z are arranged in shells as shown above. The bond formed between the atoms of Y and Z is
Attached Figure / Diagram
A
ionic
B
covalent
C
dative
D
metallic
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Element Y is Silicon
Element Z is Chlorine
Silicon reacts with chlorine to form the covalent compound SiCl4
Source: Myschool Past Questions Archive (Record #31446)
Chemistry
UTME / JAMB 1991
Non-Metals & Their Compounds
Diagram
50 cm3 of sulphur (lV) oxide, 800 cm3 of carbon (IV) oxide will respectively saturate 1.0cm3 of water at 15oC. Which of the following is suitable for demonstrating the fountain experiment?
Attached Figure / Diagram
A
Sulphur (IV) oxide and hydrogen chloride.
B
Carbon (IV) oxide and ammonia
C
Ammonia and hydrogen chloride
D
Carbon (IV) oxide and Sulphur (IV) oxide
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 #31448)
Chemistry
UTME / JAMB 1991
Reaction Rates & Chemical Equilibrium
Diagram
Solution
The data in the table above shows the rate of reaction of nitrogen (ll) oxide with chlorine at 25oC It can be concluded that doubling the initial concentration of NO increase the rate of reaction by a factor of
Attached Figure / Diagram
A
two
B
three
C
four
D
five
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
3.0 x 10-5 x 4 = 1.2 x 10-4
.: The rate increase by a factor of 4
Source: Myschool Past Questions Archive (Record #31449)
Chemistry
UTME / JAMB 1991
Acids, Bases, pH & Salts
Diagram
Solution
The appropriate test paper to use in the above experiment is moist
Attached Figure / Diagram
A
litmus psper
B
potassium heptaoxodichromate (IV) paper
C
lead (ll) trioxonitrate (V) paper
D
universal indicator paper
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Hydrogen Sulphide can easily be identified by bringing a strip of filter paper soaked in Lead(II) ethanoate solution or Lead(II) nitrate(V) solution into the gas.
H\(_2\)S turns the paper dark brown or black. The change in colour is as a result of formation of precipitate of black lead(II) Sulphide.
Source: Myschool Past Questions Archive (Record #31450)
English Language
UTME / JAMB 1991
Reading Comprehension, Summary & Composition
Solution
According to the passage, which of the following are NOT likely to contribute to a break down in communication?
A
people's attitude and feeling
B
Ambiguously phrased instruction
C
Managements and trade unions
D
Management specialists and behavioural scientists
medium Difficulty
Verified Correct Answer: Option D
Grammar & Contextual Explanation
The passage clearly states that:
“management specialists and behavioural scientists have devoted much thought and energy… to analyzing the problems caused by bad communication practices and creating good communication climate and systems.”
This means they are trying to solve communication problems, not cause them. So they are NOT likely to contribute to a breakdown in communication.
Source: Official Exam / Past Question Archive
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Sting cells are normally found in
A
Flatworms
B
Hydra
C
Snails
D
Paramecium
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4570)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Which of the following are differentiated into true roots, stems and leaves
A
Algae
B
Schizophyta
C
Pteridophyta
D
Bryophyta
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4571)
Biology
UTME / JAMB 1991
Respiration & Gaseous Exchange
To facilitate gaseous exchange, breathing roots have
A
stomata
B
mitochondria
C
cuticle
D
lenticels
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4830)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
The annulus of fern sporangium helps in
A
spore dispersal
B
conduction of mineral salt
C
trapping of light energy
D
water retention
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4833)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
One of the features which adapts Paramecium to its environment is the possession of
A
a regular shape
B
two nuclei
C
cilia
D
a pellicle
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4834)
Biology
UTME / JAMB 1991
Cell Structure, Organization & Cell Division
Diagram
Solution
Which of the following structure is associated with aerobic respiration?
Attached Figure / Diagram
A
1
B
2
C
3
D
4
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The diagram above is the the diagram of the animal cell. The organelle labelled 4 is the mitochondrion which is the site of respiration.
Source: Myschool Past Questions Archive (Record #4564)
Biology
UTME / JAMB 1991
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Solution
The structure labelled 5 is used for
Attached Figure / Diagram
A
protein synthesis
B
energy production
C
secretion
D
excretion
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The part labelled 5 is the golgi apparatus. The primary function of the Golgi apparatus (also known as the Golgi complex or Golgi body) is to modify, sort, and package proteins and lipids for secretion, or transport them to other destinations within the cell.
The primary organelle responsible for protein synthesis is the ribosome.
Source: Myschool Past Questions Archive (Record #4565)