POST UTME UNIOSUN 2025 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A polymer is formed by the condensation reaction of two monomers. Which of the following is a characteristic of the polymer formed?
A. The polymer has a high melting point.
B. The polymer is soluble in water.
C. The polymer has a high tensile strength.
D. The polymer is biodegradable.
Question 2
A 1.0 M solution of H_(2)SO_(4) is mixed with 1.0 M solution of NaOH. If the reaction is complete, what is the concentration of the remaining H_(2)SO_(4) after the reaction?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
Question 3
A sample of water is contaminated with a pollu\tant. Which of the following methods can be used to remove the pollu\tant?
A. Distillation
B. Filtration
C. Adsorption
D. All of the above
Question 4
A 0.1 M solution of NaOH is mixed with a 0.1 M solution of HCl. What is the resulting solution?
A. NaCl
B. H2O
C. NaOH
D. HCl
Question 5
A 0.5 M solution of NaOH is titrated with 0.1 M HCl. What is the pH of the solution after 25 mL of HCl has been added?
A. 10
B. 11
C. 12
D. 13
Question 6
A 0.1 M solution of NaOH is mixed with a 0.1 M solution of HCl. What is the resulting solution?
A. NaCl
B. H2O
C. NaOH
D. HCl
Question 7
The reaction of methane with chlorine gas is represented by the equation: CH4(g) + Cl2(g) → CH3Cl(g) + HCl(g). What is the type of reaction?
A. Combustion reaction
B. Substitution reaction
C. Addition reaction
D. Oxidation-reduction reaction
Question 8
A 1.0 M solution of NaOH is mixed with a 1.0 M solution of HCl. What is the pH of the resulting solution?
A. 7
B. 8
C. 9
D. 10
Question 9
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 10
A 5 g sample of a polymer is found to have a molecular weight of 10,000 g/mol. What is the number of polymer chains in the sample?
A. 10^6
B. 10^7
C. 10^8
D. 10^9
Question 11
A sample of an ideal gas is heated at cons\tant volume. Which of the following statements is true about the change in the gas's properties?
A. The gas expands and its pressure increases.
B. The gas contracts and its pressure decreases.
C. The gas expands and its pressure remains cons\tant.
D. The gas contracts and its pressure remains cons\tant.
Question 12
A 0.5 M solution of sodium chloride (NaCl) is mixed with a 0.2 M solution of silver nitrate (AgNO3). Determine the concentration of the resulting solution after the reaction is complete.
A. 0.3 M
B. 0.4 M
C. 0.5 M
D. 0.6 M
Question 13
The reaction of zinc metal with copper(II) sulfate solution is represented by the equation: Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s). What is the oxidation state of copper in the reac\tant and product?
A. Cu(II) in reac\tant and Cu(0) in product
B. Cu(0) in reac\tant and Cu(II) in product
C. Cu(II) in reac\tant and Cu(I) in product
D. Cu(I) in reac\tant and Cu(II) in product
Question 14
A 0.1 M solution of FeCl3 is mixed with a 0.1 M solution of NaOH. What is the resulting solution?
A. Fe(OH)3
B. Fe(OH)2
C. Fe(OH)4
D. Fe(OH)5
Question 15
A 1.0 L sample of a 0.5 M solution of H2SO4 is mixed with 1.0 L of a 0.2 M solution of NaOH. Calculate the number of moles of H2SO4 that react with NaOH.
A. 0.1 mol
B. 0.2 mol
C. 0.3 mol
D. 0.4 mol

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