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Chemistry WAEC / WASSCE 2009 Water, Solutions & Solubility
Salts that contain water of crystallization are said to be
A
anhydrous
B
deliquescent
C
efflorescent
D
hydrated
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following dilute acids does not react with metals to liberate hydrogen?
A
CH3COOH(aq)
B
HCI(aq)
C
H2SO4(aq)
D
HNO3(aq)
medium Difficulty
Chemistry WAEC / WASSCE 2009 Acids, Bases, pH & Salts
Which of the following compounds is not a double salt?
A
Zn(OH)NO3
B
KAI(SO4)2
C
KCr(SO4)2
D
(NH4)2Fe(SO4)2
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following hydroxides will readily dissolved in water?
A
Cu(OH)2
B
NaOH
C
Pb(OH)2
D
Zn(OH)2
medium Difficulty
Chemistry WAEC / WASSCE 2009 Acids, Bases, pH & Salts
Which of the following acids from normal salt only?
A
Tetraoxosulphate (IV) acid
B
Tetraoxophosphate (V) acid
C
Trioxonitrate (V) acid
D
Trioxosulphate (IV) acid
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
What is the value of -14oC on the Kelvin temperature scale?
A
259K
B
287 K
C
287oK
D
259oK
medium Difficulty
Chemistry WAEC / WASSCE 2009 Kinetic Theory of Matter & Gas Laws
Which of the following expressions correctly represents Charles' law?
A
PV = K
B
R \(\alpha \frac{1}{\sqrt{p}\)
C
PV = RT
D
V = KT
medium Difficulty
Chemistry WAEC / WASSCE 2009 Kinetic Theory of Matter & Gas Laws
In a mixture of gases which do not react chemically together, the pressure exerted by the individual gases is called
A
atmospheric pressure
B
partial pressure
C
total pressure
D
vapour pressure
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
In a chemical reaction, ∆H is positive when
A
H (product) >H (reactant)
B
H(product) (reactant)
C
H (product) = H (reactant)
D
H (product) = Zero (reactant)
medium Difficulty
Chemistry WAEC / WASSCE 2009 Chemical Energetics & Thermochemistry
Consider the reaction represented by the following equation: H 2(g) + \(\frac{1}{2}\) O(g) → H 2O(g) ∆H =-285.8 KJmo -1 ∆H represents the enthalpy of
A
formation
B
hydration
C
neutralization
D
solution
medium Difficulty
Chemistry WAEC / WASSCE 2009 Water, Solutions & Solubility
A solution that contains as much solute as it can dissolve at a given temperature is said to be
A
concentrated
B
saturated
C
supersaturated
D
unsaturated
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following salts is insoluble in water?
A
Pb (NO3)2
B
Na 2CO3
C
AgNO3
D
AgCI.
medium Difficulty
Chemistry WAEC / WASSCE 2009 Water, Solutions & Solubility
Which of the following statement is correct? The solubility of
A
gases increases with increase in temperature
B
gases decreases with increase in temperature
C
most solid solutes decreases with indease in temperature
D
most solid solutes is constant
medium Difficulty
Chemistry WAEC / WASSCE 2009 Reaction Rates & Chemical Equilibrium
A catalyst increases the rate of chemical reaction by
A
decreasing the temperature of the reaction
B
decreasing the activation energy of the reaction
C
increasing the surface area of the reactants
D
decreasing the surface area of the products
medium Difficulty
Chemistry WAEC / WASSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature
A
l and ll only
B
ll, lll and IV only
C
l, ll and lll only
D
l, ll, lll and IV
medium Difficulty
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