POST UTME ACHIEVERS UNIVERSITY 2019 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 2
A diagram of a titration setup is shown below. If 25.0 mL of 0.100 M HCl is added to 25.0 mL of 0.100 M NaOH, what is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 3
Calculate the enthalpy change for the reaction: 2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s).
A. -852.6 kJ/mol
B. -1423.8 kJ/mol
C. +852.6 kJ/mol
D. +1423.8 kJ/mol
Question 4
A 2.5 g sample of NaOH is dissolved in 100 mL of water. What is the molarity of the solution?
A. 0.1 M
B. 0.2 M
C. 0.5 M
D. 1 M
Question 5
The diagram below shows a titration setup. What is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 6
Identify the type of bond present in the molecule H2O.
A. Ionic
B. Covalent
C. Metallic
D. Hydrogen
Question 7
A 1.0 M solution of HCl is titrated with a 1.0 M solution of NaOH. What is the pH of the solution after the titration?
A. 1
B. 2
C. 3
D. 4
Question 8
What is the molar mass of the compound C6H12O6?
A. 180.16 g/mol
B. 60.05 g/mol
C. 12.01 g/mol
D. 36.03 g/mol
Question 9
What is the major product of the reaction between ethene and bromine?
A. C2H4Br2
B. C2H5Br
C. C2H6
D. C2H4
Question 10
A diagram of a chromatography setup is shown below. What is the purpose of the stationary phase?
A. To separate the components of a mixture
B. To identify the components of a mixture
C. To measure the concentration of a component
D. To purify a component
Question 11
The reaction of an alkane with chlorine gas is represented by the equation: R-H + Cl2 → R-Cl + HCl. What is the type of reaction that occurs?
A. Substitution reaction
B. Addition reaction
C. Elimination reaction
D. Condensation reaction
Question 12
Determine the oxidation state of sulfur in the compound SO3.
A. +2
B. +4
C. +6
D. -2
Question 13
Determine the type of reaction that occurs when 1-bromopropane reacts with sodium hydroxide in ethanol.
A. Substitution reaction
B. Elimination reaction
C. Addition reaction
D. Condensation reaction
Question 14
A 0.500 M solution of NaOH is mixed with a 0.500 M solution of HCl. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 15
A diagram of a simple black and white chemistry apparatus showing a titration setup is shown below. If 25.0 mL of 0.100 M HCl is added to 25.0 mL of 0.100 M NaOH, what is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00

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