POST UTME COVENANT UNIVERSITY 2023 Chemistry | Objective

Are you preparing for POST UTME COVENANT UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
Determine the number of moles of oxygen gas (O2) produced at s\tandard temperature and pressure (STP) when 2.5 moles of hydrogen gas (H2) react with oxygen gas according to the balanced equation: 2H2 + O2 → 2H2O.
Correct A. 1.25 moles
B. 2.5 moles
C. 5 moles
D. 10 moles

Correct Answer: A

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Question 2
A 25.0 mL sample of a solution containing 0.100 M NaCl is titrated with 0.100 M AgNO3. Calculate the number of moles of AgNO3 required to reach the equivalence point.
A. 0.0025 moles
Correct B. 0.0050 moles
C. 0.0075 moles
D. 0.0100 moles

Correct Answer: B

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Question 3
A sample of a polymer has a molecular weight of 50,000 g/mol. If 2.5 g of the polymer is dissolved in 100 mL of solvent, calculate the concentration of the solution in g/L.
A. 0.05 g/L
Correct B. 0.10 g/L
C. 0.20 g/L
D. 0.50 g/L

Correct Answer: B

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Question 4
A 2.0 L sample of a gas at 25°C and 1.0 atm is compressed to 5.0 atm at cons\tant temperature. Calculate the final volume of the gas.
A. 0.4 L
Correct B. 0.8 L
C. 1.2 L
D. 1.6 L

Correct Answer: B

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Question 5
A 100 mL sample of a solution containing 0.050 M HCl is titrated with 0.050 M NaOH. Calculate the pH of the solution after the addition of 50 mL of NaOH.
A. 1.0
B. 2.0
Correct C. 3.0
D. 4.0

Correct Answer: C

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