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Physics
UTME / JAMB 1988
Electrostatics & Capacitors
A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is
A
gamma ray
B
electron
C
neutron
D
proton
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Official Exam / Past Question Archive
Physics
UTME / JAMB 1988
Current Electricity & Electric Circuits
Diagram
Solution
the fig above shows displacement-time graphs for three different motions. which of the following statements is correct?
Attached Figure / Diagram
A
graph 2 corresponds to the highest velocity
B
graph 1 corresponds to zero velocity
C
graph 3 corresponds to a particle moving in the negative x direction
D
graph 2 corresponds to a particle moving in the positive x direction
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
At constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed.
Source: Myschool Past Questions Archive (Record #41667)
Physics
UTME / JAMB 1988
Elasticity, Density, Pressure & Fluids
Diagram
When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube is shown in the figure above, if the atmospheric pressure is 76.0cm hg, the gas pressure is
Attached Figure / Diagram
A
62.6cm hg
B
72.5cm hg
C
79.5cm hg
D
85.9cm hg
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #41669)
Physics
UTME / JAMB 1988
Current Electricity & Electric Circuits
Diagram
The fig above shows two waveforms X and Y. If the frequency of X is 30Hz what is the frequency of Y
Attached Figure / Diagram
A
12Hz
B
19Hz
C
60Hz
D
75Hz
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #41670)
Physics
UTME / JAMB 1988
Current Electricity & Electric Circuits
Diagram
Solution
In the figure above, what is the angle of reflection of the ray of light at mirror M\(_2\)?
Attached Figure / Diagram
A
\( 90^{\circ} \)
B
\( 60^{\circ} \)
C
\( 45^{\circ} \)
D
\( 30^{\circ} \)
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
From, the above figure @ M\(_2\), i = r = 60º
Source: Myschool Past Questions Archive (Record #41671)
Physics
UTME / JAMB 1988
Current Electricity & Electric Circuits
Diagram
E,F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is
Attached Figure / Diagram
A
yellow
B
red
C
black
D
blue
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #41672)
Physics
UTME / JAMB 1988
Magnetism, Electromagnetism & AC Circuits
Diagram
The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field
Attached Figure / Diagram
A
1
B
2
C
3
D
4
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #41673)
Physics
UTME / JAMB 1988
Current Electricity & Electric Circuits
Diagram
Solution
In the circuit diagram above, the ammeter reads a current of 3A when R is 5 ohms and 6A when R is 2ohms, the value of the unknown resistance X is
Attached Figure / Diagram
A
1
B
2
C
3
D
4
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
E = I( R + r ) but r = 0 and effective resistance = R + X
E = I(R + X )
E = 3( 5 + X ) .......................I
E = 6(2 + X) ........................II
since E = E
3(5 + X) = 6( 2 + X)
15 + 3X = 12 + 6X
15 - 12 = 6X - 3X
3X = 3
X = 1
Source: Myschool Past Questions Archive (Record #41674)
Physics
UTME / JAMB 1988
Electrostatics & Capacitors
Diagram
A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is
Attached Figure / Diagram
A
gamma ray
B
electron
C
neutron
D
proton
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #41675)
Chemistry
UTME / JAMB 1988
Stoichiometry, Mole Concept & Volumetric Analysis
The acidic hydrogen in the compound is the hydrogen attached to carbon number
A
5
B
4
C
3
D
1
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: Official Exam / Past Question Archive
Chemistry
UTME / JAMB 1988
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
A
Mg+
B
K+
C
CO22-
D
HCO3
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Calcium and magnesium ions (particularly calcium) negatively influence cleansing power of detergents, because these form nearly insoluble salts with soap. When the water lathers readily, it means these ions are in negligible concentration in the water.
Source: Myschool Past Questions Archive (Record #14189)
Chemistry
UTME / JAMB 1988
Water, Solutions & Solubility
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
A
S dissolves in the solution
B
crystals of R are precipitated
C
there is no observable change
D
R and S react to generate heat
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 #14190)
Chemistry
UTME / JAMB 1988
Acids, Bases, pH & Salts
Which of the following dilute solutions has the lowest pH value?
A
Calcium trioxocarbonate (IV)
B
Sodium trioxocarbonate (IV)
C
Hydrochloric acid
D
Ethanoic acid
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 #14191)
Chemistry
UTME / JAMB 1988
Acids, Bases, pH & Salts
Which of the following in aqueous solution is neutral to litmus?
A
NH4CI
B
NaCO3
C
FeCl3
D
NaCl
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 #14192)
Chemistry
UTME / JAMB 1988
Acids, Bases, pH & Salts
Solution
What volume of a 0.1 M H\(_3\)PO\(_4\) will be required to neutralize 45.0 cm\(^3\) of a 0.2 M NaOH?
A
10.0 cm3
B
20.0 cm3
C
27.0 cm3
D
30.0 cm3
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Firstly, write a balance chemical equation of the neutralization reaction
H\(_3\)PO\(_4\) + 3NaOH → Na\(_3\)PO\(_4\) + 3H\(_2\)O
Given:
V\(_A\) = ? C\(_A\) = 0.1M N\(_A\) = 1
V\(_B\) = 45cm\(^3\) C\(_B\) = 0.2M N\(_B\) = 3
Using the formula,
\(\frac{{C_A}{V_A}}{{C_B}{V_B}}\) = \(\frac{N_A}{N_B}\)
V\(_A\) = \(\frac{{C_B}{V_B}{N_A}}{{C_A}{N_B}}\)
V\(_A\) = \(\frac{{0.2}\times{45}\times{1}}{{0.1}\times{3}}\)
V\(_A\) = 30cm\(^3\)
Source: Myschool Past Questions Archive (Record #14193)