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Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following arrangements is in order of increasing metallic property?
A
Li < Na< k
B
Na < Li < K
C
K
D
K < Li < Na
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
Chlorine, bromine and iodine belong to the same group and
A
are gaseous at room temperature.
B
form white precipitate with AgNO3(aq)
C
react violently with hydrogen without heating
D
react with alkali
medium Difficulty
Chemistry WAEC / WASSCE 2011 Periodic Table & Periodicity
Which of the following elements can conveniently be placed in two groups in the periodic table ?
A
Carbon
B
Copper
C
Hydrogen
D
Oxygen
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
The bond formed when two electrons that are shared between two atoms are donated by only one of the atoms is
A
covalent
B
dative
C
ionic
D
metalic
medium Difficulty
Chemistry WAEC / WASSCE 2011 Chemical Bonding & Intermolecular Forces
When element 20A combines with element 8Y,
A
a covalent compound, AY is formed
B
an ionic compound AY is formed
C
an ionic compound, A2Y is formed
D
a covalent compound, AY2 is formed
medium Difficulty
Chemistry WAEC / WASSCE 2011 Atomic Structure, Orbitals & Nuclear Chemistry
In metallic colids, the forces of attraction are between the mobile valence electrons and
A
atoms
B
neutrons
C
the negative ions
D
positively charged nuclei
medium Difficulty
Chemistry WAEC / WASSCE 2011 Metals, Transition Elements & Extraction
Which of the following statements about displacement reaction is correct?
A
A more electropositive element displaces a less electroposive one
B
A less electropositive element displaces a more electropositive one
C
The position of elements in the reactivity series has no effect on the reaction
D
it only occurs when the reaction is at equilibrium
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
The volume occupied by 17g of H2S at s.t.p. is [H = 1.00, S = 32.0, Molar volume = 22.4 dm3]
A
11.2dm 3
B
17.0 dm3
C
34.0dm 3
D
44.8dm 3
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
Consider the reaction represented by the following equation: xKMnO 4(aq) + ySO2(g) + zH2O(I) → K 2SO4(AQ) + 2MnSO4(aq) + 2H2SO x,y and z are respectively
A
2,5 and 2
B
2,2 and 5
C
5, 1 and 2
D
1, 5 and 2
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
What is the amount of magnesium that would contain 1.20 x 1024 particles? [Mg = 24, Avogadro's constant = 6.02 x 1023]
A
0.5 moles
B
2.0 moles
C
12.0 moles
D
24.0 moles
medium Difficulty
Chemistry WAEC / WASSCE 2011 Atomic Structure, Orbitals & Nuclear Chemistry
The number of atoms in one mole of a substance is equal to the
A
mass number
B
oxidation number
C
atomic number
D
avogadro number
medium Difficulty
Chemistry WAEC / WASSCE 2011 Water, Solutions & Solubility
Which of the following statements about a molar solution is correct? it
A
is a supersaturated solution
B
cannot dissolve more of the solute at that temperature
C
contains any amount of solute in a given volume of solution
D
contains one mole of the solute in 1 dm3 of solution
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
A gas that is collected by upward delivery is likely to be
A
heavier than air
B
insoluble in water
C
lighter than air
D
soluble in water
medium Difficulty
Chemistry WAEC / WASSCE 2011 Stoichiometry, Mole Concept & Volumetric Analysis
Bubbling excess carbon (IV) oxide into calcium hydroxide solution results in the formaton of
A
CaO
B
Ca(HCO3)2
C
H2CO3
D
CaCO3
medium Difficulty
Chemistry WAEC / WASSCE 2011 Kinetic Theory of Matter & Gas Laws
The equation P = \(\frac{K}{V}\) illustrates
A
Boyle's law
B
Charles' law
C
Dalton's law
D
Gay Lussac's law
medium Difficulty
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