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Chemistry WAEC / WASSCE 2014 Acids, Bases, and Salts
Which of the following substances with the corresponding pH value is an alkali? Substance pH
A
Lime 2.4
B
Banana 4.6
C
Distilled water 7.0
D
Milk of magnesia 10.5
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
The gases produced when Cu(NO3)2(s) was heated are
A
NO and NO2
B
O2 and NO
C
NO2 and N2O4
D
O2 and NO2
medium Difficulty
Chemistry WAEC / WASSCE 2014 Acids, Bases, and Salts
Which of the following salts on hydrolysis would give an alkaline solution?
A
NH4CI(s)
B
AICI3(s)
C
CH3COONa(s)
D
NH4NO3(s)
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
Consider the reaction represented by the following equation: Na2CO3(aq) + 2HCl(aq) \(\longrightarrow\) 2NaCl(aq) + H2O(l) + CO2(g) . What volume of 0.02 mol dm-3 Na2CO3(aq) would be required to completely neutralize 40 cm3 of 0.10 mol dm-3 HCl(aq)?
A
200 cm3
B
100 cm3
C
40 cm3
D
20 cm3
medium Difficulty
Chemistry WAEC / WASSCE 2014 Kinetics, Energetics and Equilibrium
Which of the following factors would affect the equilibrium constant?
A
Concentration
B
Temperature
C
Pressure
D
Volume
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
Consider the reaction represented by the following equation: N2(g) + 3H2(g) ⇌ 2NH3(g); ∆Hϴ = -xkJ mol-1. Which of the following conditions would increase the yield of NH3?
A
Addition of iron catalyst
B
Increase in the temperature of the system
C
Increase in the volume occupied by reactants
D
Increase in the total pressure of the system
medium Difficulty
Chemistry WAEC / WASSCE 2014 Electrochemistry and Redox
The reaction that occurs all the anode when CuSO4(aq) is electrolyzed using carbon electrode is
A
2H - (aq) + 2e → H 2(g)
B
Cu2+ (aq) + 2e → Cu (s)
C
4OH (aq) -4e → 2H2O(l) + O2 (g)
D
SO4(aq)2 -2e → SO 2(g) + O2(g)
medium Difficulty
Chemistry WAEC / WASSCE 2014 Electrochemistry and Redox
Reduction is the process of
A
loss of electron
B
loss of hydrogen
C
loss of oxygen
D
addition of electronegative elements
medium Difficulty
Chemistry WAEC / WASSCE 2014 Stoichiometry & Mole Concept
Ethene molecules can be added to one another to form a long chain compound called a
A
dimer
B
monomer
C
polymer
D
trimer
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
Which of the following compounds determines the octane rating of petrol?
A
1,2,3 - trimethyl pentane
B
2,3,5 - trimethyl octane
C
2,3,5 - trimethyl pentane
D
2,2,4 - trimethyl pentane
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
Which type of reaction is illustrated by the following equation? C12H26 → 5C 2H4 + C 2H6
A
Addition
B
Cracking
C
Hydrogenation
D
Polymerization
medium Difficulty
Chemistry WAEC / WASSCE 2014 Acids, Bases, and Salts
The IUPAC name of the following organic compound is HOOC - COOH
A
ethan - 1, 2 -dioc acid
B
ethanoic acid
C
oxalic acid
D
propan - 1,2-dioic acid
medium Difficulty
Chemistry WAEC / WASSCE 2014 Matter & Separation Techniques
The enzyme that catalyses the conversion of glucose te ethanol and carbon (IV) oxide is
A
diastase
B
maltase
C
ptyalin
D
zymase
medium Difficulty
Chemistry WAEC / WASSCE 2014 Organic Chemistry
A colourless hydrocarbon with a sweet smell undergoes substitution reaction. The hydrocarbon is likely to be
A
alkanol
B
benzene
C
ester
D
methane
medium Difficulty
Chemistry WAEC / WASSCE 2014 Stoichiometry & Mole Concept
Consider the reaction represented by the following equation: C2H4(g) + 302(g) → 2CO2(g) + 2H2O(g)How many moles of ethene would be burnt to produce 0.1 mole of water?
A
0.05 mole
B
0.10 mole
C
0.20 mole
D
2.00 moles
medium Difficulty
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