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English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 95 above, choose the best option from letters A - E that best completes the gap.
A
purification
B
hygiene
C
innoculation
D
vigour
E
living
medium Difficulty
Verified Correct Answer: Option B
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #24593)
English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 96 above, choose the best option from letters A - E that best completes the gap.
A
immunizing
B
cooking
C
refining
D
clarifying
E
sterilizing
medium Difficulty
Verified Correct Answer: Option E
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #24594)
English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 97 above, choose the best option from letters A - E that best completes the gap.
A
concoction
B
conviction
C
narration
D
prescription
E
description
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: Myschool Past Questions Archive (Record #24595)
English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 98 above, choose the best option from letters A - E that best completes the gap.
A
pharmacist
B
physiotherapist
C
scientist
D
virologist
E
dermatologist
medium Difficulty
Verified Correct Answer: Option A
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #24596)
English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 99 above, choose the best option from letters A - E that best completes the gap.
A
revive
B
cleanse
C
heal
D
repair
E
cure
medium Difficulty
Verified Correct Answer: Option E
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #24597)
English Language
WAEC / WASSCE 1998
Lexis, Structure & Register (Cloze & Vocabulary)
In question numbered 100 above, choose the best option from letters A - E that best completes the gap.
A
habits
B
manners
C
health
D
life
E
condition
medium Difficulty
Verified Correct Answer: Option C
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #24598)
Chemistry
UTME / JAMB 1998
Nature of Matter & Separation Techniques
The addition of water to calcium oxide leads to?
A
a physical change
B
a chemical change
C
the formation of a mixture
D
an endothermic change
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 #13862)
Chemistry
UTME / JAMB 1998
Organic Chemistry I: Hydrocarbons & Crude Oil
A mixture of iron and sulphur can be separated by dissolving the mixture in?
A
steam
B
dilute hydrochloric acid
C
dilute sodium hydroxide
D
benzene
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 #13863)
Chemistry
UTME / JAMB 1998
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
A given amount of gas occupies 10.0 dm3 at 4atm and 273^\circC. The number of moles of the gas present is?
(Molar volume of a gas at s.t.p. = 22.4 dm3)
A
0.89 mol
B
1.90 mol
C
3.80 mol
D
5.70 mol
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
\(V_1\) = \(10dm^3\), \(V_2\) = ?, \(P_1\) = 4atm = 4 x 760 = 3040mmHg, \(P_2\) = 760mmHg \(T_1\) = 273ºc = 273 + 273 = 546K, \(T_2\) = 273K
Using the general gas law = \(\frac{P_1 V_1}{ T_1} = \frac{P_2 V_2}{T_2}\)
\(V_2 = \frac{P_1 V_1 T_2}{P_2 T_1}\)
\(V_2 = \frac{ 3040 \times10 \times273}{760 \times546}\)
\(V_2 = 20dm^{-3}\)
1mole of a gas = \(22. 4dm^{3}\)
x = \(20.0dm^{3}\)
= 0.89mol.
Source: Myschool Past Questions Archive (Record #13864)
Chemistry
UTME / JAMB 1998
Stoichiometry, Mole Concept & Volumetric Analysis
8.0 g of an element X react with an excess of copper (ll) tetraoxosulphate (lV) solution to deposit 21.3 g of copper. The correct equation for the reaction is?
(Cu = 64).
A
X(s) + CuSO4(aq) → Cu(s) + XSO4(aq)
B
X(s) + 2CuSO4(aq) → 2Cu(s) + X(SO4)2(aq)
C
2X(s) + CuSO4(aq) → Cu(s) + X2SO4(aq)
D
2X(s) + 3CuSO4(aq) → 3Cu(s) + X2(SO4)3(aq)
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 #13865)
Chemistry
UTME / JAMB 1998
Kinetic Theory of Matter & Gas Laws
Solution
C3H8(g) + 502(g) → 4H2O + 3CO2(g). Form the equation above the volume of oxygen at s.t.p. required to burn 50cm3 of propane is?
A
250 cm3
B
150 cm3
C
100 cm 3
D
50 cm3
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
C3H8 + 502 → 4H2O + 3CO2.
From the equation above 1 dm3 of C3H8 require 5dm3 of O2 at s.t.p.
∴ 50cm3 of C3H8 require x = (50) / (1000) x 5 x 1
x = (250) / (1000)
x = 250cm
Source: Myschool Past Questions Archive (Record #13867)
Chemistry
UTME / JAMB 1998
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
30cm3 of hydrogen was collected over water at 27°C and 780 mm Hg. If the vapour pressure of water at the temperature of the experiment was 10 mm Hg, calculate the volume of the gas at 760 mm Hg and 7°C?
A
40.0 cm3
B
35.7 cm3
C
28.4 cm3
D
25.2 cm3
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Y1 = 30cm3 T1 = 27 + 273 = 300K and P1 = (780 - 10)mm Hg i.e the pressure minus the vapour pressure of water
P2 = 760mm Hg and T2 = 7 + 273 = 280K
From (P2V2) / (T2) = (P1V1) / (T1)
(770 x 30) / (300) = (760 x O2) / (280)
V2 = (770 x 30x 280) / (300 x 760)
V2 = 28.4 cm3
Source: Myschool Past Questions Archive (Record #13869)
Chemistry
UTME / JAMB 1998
Organic Chemistry I: Hydrocarbons & Crude Oil
If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion Rso2 and Rch4 will be in the ratio?
(S = 32, O = 16, C = 12, H = 1)
A
4:1
B
2:1
C
1:2
D
1:4
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 #13870)
Chemistry
UTME / JAMB 1998
Periodic Table & Periodicity
Which of the following electron configurations indicates an atom with the highest ionization energy?
A
2,8,7
B
2,8,8,1
C
2,8,8,2
D
2,8,8,7
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 #13872)
Chemistry
UTME / JAMB 1998
Atomic Structure, Orbitals & Nuclear Chemistry
The line observed in the sample hydrogen spectrum are due to emission of?
A
electrons from the atoms
B
energy by proton transition
C
energy by electron transition
D
neutron from the atom
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 #13873)