POST UTME UNIBEN 2017 Chemistry | Objective

Are you preparing for POST UTME UNIBEN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A solution of sodium chloride (NaCl) is prepared by dissolving 35.5 g of NaCl in 100 mL of water. Calculate the molar concentration of the solution.
A. 0.6 M
B. 0.8 M
Correct C. 1.0 M
D. 1.2 M

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A sample of hydrogen gas (H2) is collected over water at a temperature of 25°C and a pressure of 1 atm. If the volume of the gas is 2.5 L, calculate the partial pressure of the hydrogen gas.
A. 0.5 atm
Correct B. 0.7 atm
C. 0.9 atm
D. 1.1 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A metal rod is heated to a temperature of 800°C and then quenched in water. If the metal has a specific heat capacity of 0.5 J/g°C, calculate the temperature of the metal after quenching.
A. 20°C
B. 30°C
Correct C. 40°C
D. 50°C

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A solution of sodium hydroxide (NaOH) is prepared by dissolving 25 g of NaOH in 100 mL of water. If the molar concentration of the solution is 1.5 M, calculate the volume of the solution required to neutralize 50 mL of 0.5 M hydrochloric acid (HCl).
A. 20 mL
B. 30 mL
Correct C. 40 mL
D. 50 mL

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A sample of oxygen gas (O2) is collected over water at a temperature of 25°C and a pressure of 1 atm. If the volume of the gas is 3.2 L, calculate the partial pressure of the oxygen gas.
A. 0.7 atm
B. 0.9 atm
Correct C. 1.1 atm
D. 1.3 atm

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
The reaction of 2,2-dimethylpropane with chlorine gas in the presence of light results in the formation of 1,1-dichloro-2,2-dimethylpropane. What is the major product formed in the reaction?
Correct A. 1,1-dichloro-2,2-dimethylpropane
B. 1,2-dichloro-2,2-dimethylpropane
C. 2,2-dimethylpropane
D. chlorine gas

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A sample of a metal oxide is heated in a crucible. The resulting gas is collected and found to be carbon dioxide. What is the metal oxide?
Correct A. CaO
B. MgO
C. Al2O3
D. Fe2O3

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A solution of sodium hydroxide is added to a solution of acetic acid. The resulting solution is acidic. What is the pH of the solution?
A. 1
Correct B. 2
C. 7
D. 10

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A sample of a metal is heated in a crucible. The resulting gas is collected and found to be hydrogen gas. What is the metal?
A. Zn
Correct B. Mg
C. Al
D. Fe

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A solution of sodium hydroxide is added to a solution of sulfuric acid. The resulting solution is basic. What is the pH of the solution?
A. 1
B. 2
Correct C. 7
D. 10

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