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Chemistry UTME / JAMB 1994 Chemical Bonding & Intermolecular Forces
The shape of ammonia molecule is?
A
trigonal planar
B
octahedral
C
square planar
D
tetrahedral
medium Difficulty
Chemistry UTME / JAMB 1994 Stoichiometry, Mole Concept & Volumetric Analysis
An increase in temperature causes an increase in the pressure of a gas because?
A
it decreases the number of collision between the molecules
B
the molecules of the gas bombard the walls of the container more frequently
C
it increases the number of collision between the molecules
D
it causes the molecules to combine
medium Difficulty
Chemistry UTME / JAMB 1994 Atomic Structure, Orbitals & Nuclear Chemistry
The number of electrons in the valence shell of an element of atomic number 14 is?
A
1
B
2
C
3
D
4
medium Difficulty
Chemistry UTME / JAMB 1994 Periodic Table & Periodicity
Which of the following physical properties decreases down a group in the periodic table?
A
Atomic radius
B
Ionic radius
C
Electropositivity
D
Electronegativity
medium Difficulty
Chemistry UTME / JAMB 1994 Chemical Bonding & Intermolecular Forces
Element X, Y and Z belong to a groups I, V and VII respectively. Which of the following is TRUE about the bond types of XZ and YZ3?
A
Both are electrovalent
B
Both are covalent
C
XZ is electrovalent and YZ3 is covalent
D
XZ is covalent and YZ3 is electrovalent
medium Difficulty
Chemistry UTME / JAMB 1994 Water, Solutions & Solubility
A solid that absorbs water from he atmosphere and forms an aqueous solution is?
A
hydrophilic
B
efforescent
C
deliquescent
D
hygroscopic
medium Difficulty
Chemistry UTME / JAMB 1994 Stoichiometry, Mole Concept & Volumetric Analysis
A major effect of oil pollution in coastal waters is the?
A
destruction of marine life
B
desalination of the water
C
increase in the acidity of the water
D
detoxification of the water
medium Difficulty
Chemistry UTME / JAMB 1994 Water, Solutions & Solubility
Sodium chloride has no solubility product value because of its?
A
saline nature
B
high solubility
C
low solubility
D
insolubility
medium Difficulty
Chemistry UTME / JAMB 1994 Stoichiometry, Mole Concept & Volumetric Analysis
The solubility, in moles per dm3 of 20.2 g of potassium trioxonitrate (V) dissolve in 100 g of the resulting mixture is? (K = 39, O = 16, N =14).
A
0.10
B
0.20
C
1.00
D
2.00
medium Difficulty
Chemistry UTME / JAMB 1994 Atomic Structure, Orbitals & Nuclear Chemistry
Which of the following atoms represents deuterium?
A
No protons = 1, No of neutrons = 0, No of electrons = 0
B
No protons = 1, No of neutrons = 0, No of electrons = 1
C
No protons = 1, No of neutrons = 1, No of electrons = 1
D
No protons = 1, No of neutrons = 2, No of electrons = 1
medium Difficulty
Chemistry UTME / JAMB 1994 Acids, Bases, pH & Salts
A few drops of concentrated HCI are added to about 10cm3 of a solution of pH 3.4. The pH of the resulting mixtures is?
A
less than 3.4
B
greater than 3.4
C
unaltered
D
the same as that of pure water
medium Difficulty
Chemistry UTME / JAMB 1994 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following compounds is a base?
A
CO2
B
CaO
C
H3PO3
D
CH3COOCH3
medium Difficulty
Chemistry UTME / JAMB 1994 Stoichiometry, Mole Concept & Volumetric Analysis
20 cm\(^3\) of a 2.0 M solution of ethanoic acid was added to excess of 0.05 M sodium hydroxide. The mass of the salt produced is? (Na = 23, C = 12, O = 16, H = 1)
A
2.50 g
B
2.73 g
C
3.28 g
D
4.54 g
medium Difficulty
Chemistry UTME / JAMB 1994 Electrolysis & Electrochemical Cells
Crude copper could be purified by the electrolysis of concentrated copper (II) chloride if the crude copper is?
A
made both the anode and the cathode
B
made the cathode
C
made the anode
D
dissolved in the solution
medium Difficulty
Chemistry UTME / JAMB 1994 Acids, Bases, pH & Salts
H- + H2(I)O → H2(g) + OH-(aq). From the equation above, it can be inferred that the?
A
reaction is a double decomposition
B
hydride ion is a reducing agent
C
hydride ion is an oxidizing agent
D
reaction is neutralization
medium Difficulty
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