POST UTME CALEB UNIVERSITY 2025 Chemistry | Objective

Are you preparing for POST UTME CALEB UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A 25.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the pH of the solution after the addition of 25.0 mL of NaOH.
A. 2.00
Correct B. 3.00
C. 4.00
D. 5.00

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
The s\tandard electrode potential of the cell is 1.10 V. If the cell is connected to a 10.0 Ω resistor, what is the current flowing through the cell?
A. 0.50 A
Correct B. 1.00 A
C. 2.00 A
D. 3.00 A

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A 2.00 g sample of a metal is heated in a crucible until it melts. The mass of the crucible and the metal is 2.50 g. After heating, the mass of the crucible and the metal is 2.20 g. What is the density of the metal?
A. 8.00 g/cm³
B. 9.00 g/cm³
Correct C. 10.0 g/cm³
D. 11.0 g/cm³

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A solution contains 0.100 M NH₃ and 0.100 M HCl. What is the pH of the solution?
A. 4.00
Correct B. 5.00
C. 6.00
D. 7.00

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A 10.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the pH of the solution after the addition of 20.0 mL of NaOH.
A. 3.00
B. 4.00
Correct C. 5.00
D. 6.00

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
Determine the molar mass of a polymer with the following monomer units: CH2=CH-CH3, CH2=CH-CH2-CH3, and CH2=CH-CH2-CH2-CH3. The polymer has a molecular formula of \( CH2=CH-CH3 \)n, \( CH2=CH-CH2-CH3 \)m, and \( CH2=CH-CH2-CH2-CH3 \)p.
A. 120 g/mol
B. 180 g/mol
Correct C. 240 g/mol
D. 300 g/mol

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A 0.500 M solution of NaOH is prepared by dissolving 25.0 g of NaOH in 1.00 L of water. What is the concentration of OH- ions in the solution?
A. 0.250 M
Correct B. 0.500 M
C. 0.750 M
D. 1.00 M

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A 2.00 L sample of a gas at 25°C and 1.00 atm is collected over water at 25°C. The vapor pressure of water at 25°C is 23.8 torr. What is the partial pressure of the gas?
A. 0.976 atm
Correct B. 0.987 atm
C. 0.998 atm
D. 1.01 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A 10.0 g sample of a metal is heated to 1000°C and then quenched in water. The resulting solution is 0.500 M in metal ions. What is the molar mass of the metal?
A. 40.0 g/mol
B. 50.0 g/mol
Correct C. 60.0 g/mol
D. 70.0 g/mol

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A 5.00 g sample of a polymer is dissolved in 100.0 mL of solvent. The resulting solution has a vis\cosity of 0.500 Pa·s. What is the molar mass of the polymer?
A. 10,000 g/mol
B. 20,000 g/mol
Correct C. 30,000 g/mol
D. 40,000 g/mol

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

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:
Chat with Support