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Chemistry
UTME / JAMB 1988
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Methylethanoate reacts with ammonia to yield?
A
mettylamine and ethanol
B
ethylamine and methanol
C
methanamide and ethanol
D
ethanamide and methanol
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 #14218)
Chemistry
UTME / JAMB 1988
Organic Chemistry I: Hydrocarbons & Crude Oil
The four classes of hydrocarbons are?
A
ethane, ethene, ethyne and benzene
B
alkanes, alkenes, alkynes and aromatics
C
alkanes, alkenes, alkynes and benzene
D
methane, ethane , propane and butane
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 #14221)
Chemistry
UTME / JAMB 1988
Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following compounds has the highest boiling point?
A
CH3CH2CH2CH2HO
B
CH3CH2CH2CHO
C
CH3CH2CH2CH3
D
CH3CH2OCH2CH3
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 #14222)
Chemistry
UTME / JAMB 1988
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Detergents have the general formula?
A
R(CH2)nOH
B
RSO3-Na+
C
RSO-2Na+
D
RSO2H
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 #14223)
Chemistry
UTME / JAMB 1988
Non-Metals & Their Compounds
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
A
Steam distillation
B
Destructive distillation
C
Liquefaction
D
Hydrolysis
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 #14224)
Chemistry
UTME / JAMB 1988
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?
A
MX
B
M3X4
C
M4X3
D
M3X2
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
M2+ + X-4 = M4X3
Source: Myschool Past Questions Archive (Record #14225)
Chemistry
UTME / JAMB 1988
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?
(G.M.V = 22.4 dm3 mol-1)
A
112.0 dm3
B
67.2 dm3
C
56.0 dm3
D
44.8 dm3
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
C3H8 + 5O2 → 3CO2 + 4H2O
When the mixture is ignited CO2 is collected as product. From the equation 33 moles of CO2 is produced which equals 3 x 2.4 dm3 = 67.2 dm3 at S.T.P
Source: Myschool Past Questions Archive (Record #14228)
Chemistry
UTME / JAMB 1988
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?
A
average velocity of the molecules
B
number of collisions between the molecules
C
density of the molecules
D
free mean path between each molecules and other
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
With reference to the Kinetic Molecular Theory of gases, the temperature of a gas is a direct measure of the average kinetic energy of its molecules. When temperature increases, the molecules gain more energy and their average velocity (speed) increases.
This increase in velocity leads to a rise in pressure through forceful collisions, as the faster-moving molecules strike the walls of the container with greater momentum, thereby, exerting a larger force per impact. Also, due to frequent collisions because they are moving faster, hence, molecules travel the distance between the walls in less time, leading to more frequent collisions with those walls.
Source: Myschool Past Questions Archive (Record #14229)
Chemistry
UTME / JAMB 1988
Chemical Bonding & Intermolecular Forces
The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?
A
coulombic
B
ionic
C
covalent
D
Van der waals
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 #14230)
Chemistry
UTME / JAMB 1988
Atomic Structure, Orbitals & Nuclear Chemistry
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
A
20
B
18
C
16
D
2
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 #14231)
Chemistry
UTME / JAMB 1988
Periodic Table & Periodicity
Which of the following physical properties decreases across the Periodic Table?
A
Ionization potenial
B
Electron affinity
C
Electronegativity
D
Atomic radius
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 #14232)
Chemistry
UTME / JAMB 1988
Oxidation, Reduction & Redox Reactions
Solution
What are the possible oxidation numbers of an element if its atomic number is 17?
A
-1 and 7
B
-1 and 6
C
-3 and 5
D
-2 and 6
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
17 = 2, 8, 7
Source: Myschool Past Questions Archive (Record #14233)
Chemistry
UTME / JAMB 1988
Periodic Table & Periodicity
The energy changes accompanying the addition of an electron to a gaseous atom is called?
A
first ionization energy
B
second ionization energy
C
electron affinity
D
electronegativity
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 #14234)
Chemistry
UTME / JAMB 1988
Water, Solutions & Solubility
Solution
The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?
A
nitrogen is less soluble than oxygen
B
oxygen is heavier than nitrogen
C
nitrogen has a higher partial pressure in air
D
gases are hydrated in water
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
the ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air. This is because oxygen in the air has a higher solubility than other elements in the air and also there is hydrogen bonding between water and oxygen that increases its solubility.
Source: Myschool Past Questions Archive (Record #14235)
Chemistry
UTME / JAMB 1988
Oxidation, Reduction & Redox Reactions
An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
A
water
B
moist SO2
C
acidified KMnO4 and water
D
water, acidified KMnO4 and oxygen
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 #14236)