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Chemistry
UTME / JAMB 1987
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
In which of the following are the aqueous solutions of each of the substances correctly arranged in order to decreasing acidity?
A
Ethanoic acid, milk or magnesia, sodium chloride, hydrochloric acid and sodium hydroxide
B
Ethanoic acid, hydrochloric acid, milk of magnesia, sodium chloride and sodium chloride and sodium hydroxide
C
Hydrochloride acid, ethanol acid, sodium chloride, milk of magnesia and sodium hydroxide
D
Hydrochloride acid, sodium hydroxide sodium chloride, ethanol acid, and milk of magnesia
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 #14595)
Chemistry
UTME / JAMB 1987
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
If 24.83 cm3 of 0.15 M NaOH is titrated to its end point with 39.45 cm3
of HCl, what is the molarity of the HCl?
A
0.094 M
B
0.150 M
C
0.940 M
D
1.500 M
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
NaOH + HCl → NaCl + H2O moles ratio = 1/1
↔ (MaVa) / Mb x 39.45 = 0.094
Source: Myschool Past Questions Archive (Record #14598)
Chemistry
UTME / JAMB 1987
Chemical Bonding & Intermolecular Forces
Solution
The atomic numbers of two elements X and Y are 12 and 19 respectively. The bond of these two elements is?
A
ionic
B
covalent
C
Metallic
D
co-ordinate
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
- Both elements are Magnesium and Potassium respectively
- In general, covalent bonds form between nonmetals, ionic bonds form between metals and nonmetals, and metallic bonds form between metals.
Source: Myschool Past Questions Archive (Record #14600)
Chemistry
UTME / JAMB 1987
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
If d represents the density of a gas and K is a constant, the rate of gaseous diffusion r is related to d by the equation?
A
r = k/√d
B
r = kd
C
r =k/d
D
r = k √d
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
r = k /√d
Source: Myschool Past Questions Archive (Record #14603)
Chemistry
UTME / JAMB 1987
Atomic Structure, Orbitals & Nuclear Chemistry
Solution
An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?
A
Neutrons 53, Protons 17
B
Neutrons 17, Protons 36
C
Neutrons 19, Protons 17
D
Neutrons 36, Protons 17
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Mass number = number of protons + number of neutrons
36 = 17 + X; X = 36 -17 = 19
19 neutrons and 17 protons
Source: Myschool Past Questions Archive (Record #14605)
Chemistry
UTME / JAMB 1987
Particulate Nature of Matter, Laws & Formulae
Solution
An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?
A
16.0
B
16.2
C
17.0
D
17.8
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Mass number of Z = 16 while that of Z is 18
90 x 16 = 14.4 10 x 18 = 1.8
100 1 100 1
it relative atomic mass = 14.4 + 1.8 = 162
Source: Myschool Past Questions Archive (Record #14607)
Chemistry
UTME / JAMB 1987
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Diagram
Solution
Use the option above to answer this question. Which is the correct set of results for tests conducted respectively on fresh lime juice and ethanol.
Attached Figure / Diagram
A
A
B
B
C
C
D
D
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
lime juice reacts with NaCO3 with the evolution of CO2 because it is an acid while NaCO3 with ethanol does not result in a significant chemical reaction.
Source: Myschool Past Questions Archive (Record #31379)
Chemistry
UTME / JAMB 1987
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Diagram
Solution
Use the option above to answer this question. The structure of benzoic acid is
Attached Figure / Diagram
A
A
B
B
C
C
D
D
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Benzoic acid is a simple aromatic carboxylic acid with the chemical formula C\(_6\)H\(_5\)COOH. Its structure consists of a benzene ring (C\(_6\)H\(_6\)) with a carboxyl group (COOH) attached to it. This carboxyl group is what gives benzoic acid its acidic properties.
(See diagram above)
Source: Myschool Past Questions Archive (Record #31381)
Chemistry
UTME / JAMB 1987
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
Use the option above to answer this question. The structure of benzoic acid is
A
A
B
B
C
C
D
D
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Benzoic acid is a simple aromatic carboxylic acid with the chemical formula C\(_6\)H\(_5\)COOH. Its structure consists of a benzene ring (C\(_6\)H\(_6\)) with a carboxyl group (COOH) attached to it. This carboxyl group is what gives benzoic acid its acidic properties.
(See diagram above)
Source: Official Exam / Past Question Archive
English Language
UTME / JAMB 1987
Reading Comprehension, Summary & Composition
Which one of the following is NOT true of the passage?
A
the lady was beautiful
B
the marriage cost a lot of money
C
the marriage was according to native law and custom
D
Fatmata never had an issue
E
the author wanted another wife
medium Difficulty
Verified Correct Answer: Option D
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Official Exam / Past Question Archive
Biology
UTME / JAMB 1987
Cell Structure, Organization & Cell Division
The functions of endoplasmic reticulum is
A
protein synthesis
B
intracellular transport of materials
C
digestion and destruction of foreign bodies
D
production of energy from glucose
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 #3667)
Biology
UTME / JAMB 1987
Variety of Organisms & Classification of Living Things
Solution
Which of the following features of euglena is found only in animals?
A
Paramylum granules
B
Flagellum
C
Pellicle
D
Pyrenoid
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Euglena, a single-celled organism, is known for its unique structure and flexibility, lacking a rigid cell wall like plants. Instead, it has a pellicle composed of protein layers, which allows it to change shape and move. The pellicle in Euglena is a flexible, proteinaceous structure that supports the cell membrane and allows for shape changes.
Pellicles, which are flexible, protein-based structures found in Euglena, are not typically found in animals. Instead, animals have cell membranes and may have specialized outer layers like skin or exoskeletons, but not a pellicle.
Pyrenoids are found in Euglena chloroplasts, but not in animal cells.
Flagella are found in Euglena and some animal cells (specifically sperm cells), with Euglena using them for locomotion and animal sperm cells for movement.
Paramylon granules, a storage form of carbohydrate similar to starch, are found in Euglena, but not in animals.
Source: Myschool Past Questions Archive (Record #3669)
Biology
UTME / JAMB 1987
Variety of Organisms & Classification of Living Things
An organism found on a bare rock surface has features of algae and fungi. The organism is
A
an epiphyte
B
a lichen
C
a bryophyte
D
a fern
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 #3671)
Biology
UTME / JAMB 1987
Cell Structure, Organization & Cell Division
In a plant exhibiting alternation of generations, the diploid multicellular stage is known as
A
gametophyte
B
spermatophyte
C
holophyte
D
sporophyte
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 #3672)
Biology
UTME / JAMB 1987
Variety of Organisms & Classification of Living Things
Solution
A characteristic that distinguishes bryophytes from flowering plants is the
A
possession of true stems and leaves
B
ability to reproduce asexually
C
absence of vascular tisssues
D
ability to grow in moist habitats
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
A key characteristic distinguishing bryophytes from flowering plants is the absence of vascular tissue (xylem and phloem). This means bryophytes lack true roots, stems, and leaves, and must absorb water and nutrients directly through their surfaces, limiting their size and growth. Flowering plants, in contrast, have a well-developed vascular system to transport water and nutrients efficiently, allowing them to grow much larger.
Source: Myschool Past Questions Archive (Record #3673)