POST UTME BOWEN UNIVERSITY 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The boiling point of a solution is 102°C. If the boiling point of the pure solvent is 100°C, what is the molality of the solution?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 2
A 1.00 M solution of NaOH is mixed with a 1.00 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 3
The following diagram shows a chemical apparatus setup. What is the purpose of the heating bath?
A. To heat the liquid
B. To cool the vapor
C. To mix the reac\tants
D. To measure the temperature
Question 4
The reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is represented by the equation: NaOH + HCl → NaCl + H2O. What is the pH of the solution after the reaction?
A. 1
B. 2
C. 3
D. 4
Question 5
The reaction between sodium carbonate (Na2CO3) and hydrochloric acid (HCl) is represented by the equation: Na2CO3 + 2HCl → 2NaCl + H2O + CO2. What is the pH of the solution after the reaction?
A. 1
B. 2
C. 3
D. 4
Question 6
A 1.0 L flask contains 0.50 mol of an ideal gas at 37°C. Calculate the volume of the gas in the flask.
A. 0.5 L
B. 0.5 L
C. 0.5 L
D. 0.5 L
Question 7
Determine the oxidation state of the underlined element in the compound [K_2Cr_2O_7].
A. +6
B. +5
C. +3
D. +2
Question 8
The diagram below shows a titration setup. What is the purpose of the burette?
A. To measure the volume of the solution
B. To measure the concentration of the solution
C. To measure the pH of the solution
D. To measure the temperature of the solution
Question 9
The solubility of NaCl in water at 25°C is 37.2 g/100 g of water. Calculate the molar solubility of NaCl in water at 25°C.
A. 0.36 M
B. 0.36 M
C. 0.36 M
D. 0.36 M
Question 10
The following diagram shows a chemical apparatus setup. What is the purpose of the flask?
Question 11
A 3.00 g sample of a metal is heated in a crucible until it melts. The mass of the crucible and metal is 3.50 g. The mass of the crucible alone is 2.50 g. What is the molar mass of the metal?
A. 50.0 g/mol
B. 75.0 g/mol
C. 100 g/mol
D. 150 g/mol
Question 12
The diagram below shows a setup for the electrolysis of [NaCl] solution. Identify the product formed at the cathode.
A. [H_2]
B. [Cl_2]
C. [Na]
D. [NaOH]
Question 13
The s\tandard enthalpy of formation of H2O(l) is -285.8 kJ/mol. Calculate the s\tandard enthalpy of formation of H2(g) if the s\tandard enthalpy of formation of O2(g) is 0 kJ/mol.
A. 0 kJ/mol
B. 0 kJ/mol
C. 0 kJ/mol
D. 0 kJ/mol
Question 14
The following diagram shows a titration setup. What is the purpose of the pipette?
A. To measure the volume of the titrant
B. To measure the volume of the analyte
C. To mix the titrant and analyte
D. To measure the pH of the solution
Question 15
A solution contains 5.00 g of NaCl in 100.0 mL of water. What is the molarity of the solution?
A. 0.500 M
B. 0.750 M
C. 1.00 M
D. 1.25 M

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