POST UTME AL-HIKMAH UNIVERSITY 2025 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A solution of 0.1 M H2SO4 is mixed with a solution of 0.1 M NaOH. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 2
A 2.0 M solution of H_(2)SO_(4) is prepared by dissolving 2.0 g of H_(2)SO_(4) in enough water to make 100 mL of solution. What is the molarity of the solution?
A. 2.0 M
B. 4.0 M
C. 6.0 M
D. 8.0 M
Question 3
The s\tandard electrode potential (E°) for the reaction Zn(s) + 2Ag^+(aq) → Zn^2+(aq) + 2Ag(s) is +0.76 V. What is the s\tandard electrode potential (E°) for the reaction Zn^2+(aq) + 2e^\( - \) → Zn(s)?
A. -0.76 V
B. -0.38 V
C. +0.38 V
D. +0.76 V
Question 4
A 10.0 mL sample of 0.1 M NaOH is added to 20.0 mL of 0.1 M HCl. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 5
A 25.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. If the pH of the resulting solution is 7.00, what is the volume of NaOH added?
A. 12.5 mL
B. 25.0 mL
C. 37.5 mL
D. 50.0 mL
Question 6
The s\tandard electrode potential (E°) for the reaction Cu^2+(aq) + 2e^\( - \) → Cu(s) is +0.34 V. What is the s\tandard electrode potential (E°) for the reaction Cu(s) → Cu^2+(aq) + 2e^\( - \)?
A. -0.34 V
B. -0.17 V
C. +0.17 V
D. +0.34 V
Question 7
A metal (M) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H2) and a salt (MCl2). The reaction is as follows: M + 2HCl -> H2 + MCl2. If 2.5 g of M reacts with 10 mL of 2 M HCl, what is the molar mass of M?
A. 50 g/mol
B. 75 g/mol
C. 100 g/mol
D. 125 g/mol
Question 8
A metal (M) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H2) and a salt (MCl2). The reaction is as follows: M + 2HCl -> H2 + MCl2. If 2.5 g of M reacts with 10 mL of 2 M HCl, what is the molar mass of M?
A. 50 g/mol
B. 75 g/mol
C. 100 g/mol
D. 125 g/mol
Question 9
The compound with the molecular formula C2H4O is an example of an aldehyde. What is the IUPAC name of this compound?
A. Acetaldehyde
B. Propionaldehyde
C. Butyraldehyde
D. Pen\tanal
Question 10
The reaction between hydrogen gas and oxygen gas is an example of a combustion reaction. What is the products of this reaction?
A. Water and heat
B. Carbon dioxide and water
C. Hydrogen peroxide and heat
D. Sodium hydroxide and hydrochloric acid
Question 11
A 0.1 M solution of NaOH is prepared by dissolving 4 g of NaOH in enough water to make 1 L of solution. What is the concentration of OH^- ions in the solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 12
The compound with the molecular formula C2H6O is an example of a primary alcohol. What is the IUPAC name of this compound?
A. Ethanol
B. Propanol
C. Bu\tanol
D. Pen\tanol
Question 13
The reaction between chlorine gas and potassium bromide is an example of a redox reaction. What is the oxidation state of bromine in potassium bromide?
A. 0
B. -1
C. +1
D. +2
Question 14
A metal 'A' reacts with dilute hydrochloric acid to produce a gas 'X'. The reaction is as follows: A + 2HCl → X + 2H2O. If 2.5 g of metal 'A' reacts with 50 cm³ of dilute hydrochloric acid, calculate the volume of gas 'X' produced at STP.
A. 50 cm³
B. 75 cm³
C. 100 cm³
D. 125 cm³
Question 15
A 2.00 g sample of an unknown metal is heated in a crucible until it melts. The temperature of the metal is measured to be 1073 K. If the specific heat capacity of the metal is 0.200 J/g·K, what is the enthalpy of fusion of the metal?
A. 8.31 kJ/mol
B. 10.3 kJ/mol
C. 12.4 kJ/mol
D. 14.5 kJ/mol

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: