POST UTME COVENANT UNIVERSITY 2020 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 2020 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
Determine the molar solubility of CaF2 in a 0.1 M NaF solution, given that the solubility product cons\tant (Ksp) for CaF2 is 3.9 x 10^-11.
Correct A. 1.0 x 10^-5 M
B. 1.0 x 10^-6 M
C. 1.0 x 10^-7 M
D. 1.0 x 10^-8 M

Correct Answer: A

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Question 2
A 2.5 L flask contains 0.5 mol of an unknown gas at 27°C. Calculate the pressure of the gas u\sing the ideal gas law.
A. 1.0 atm
Correct B. 2.0 atm
C. 3.0 atm
D. 4.0 atm

Correct Answer: B

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Question 3
A solution contains 0.1 M NaCl and 0.1 M CaCl2. What is the concentration of Cl- ions in the solution?
A. 0.1 M
Correct B. 0.2 M
C. 0.3 M
D. 0.4 M

Correct Answer: B

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Question 4
A 50 mL sample of a 0.1 M HCl solution is titrated with 0.1 M NaOH solution. What is the pH of the solution after the titration?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 5
A 2.0 L flask contains 0.5 mol of CO2 gas at 27°C. What is the partial pressure of CO2 in the flask?
A. 1.0 atm
Correct B. 2.0 atm
C. 3.0 atm
D. 4.0 atm

Correct Answer: B

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Question 6
Determine the major product of the reaction between 2-methylpropene and HCl.
A. CH₃CH₂CH₂CH₂Cl
B. (CH₃)₂CHCH₂Cl
Correct C. (CH₃)₃CCl
D. CH₃CH₂CH₂CH₂CH₂Cl

Correct Answer: C

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Question 7
A 25.0 mL sample of 0.100 M HCl is mixed with 25.0 mL of 0.100 M NaOH. Calculate the pH of the resulting solution.
A. 2.00
Correct B. 3.00
C. 4.00
D. 5.00

Correct Answer: B

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Question 8
A solution contains 0.500 M H₂SO₄ and 0.500 M NaOH. What is the pH of the solution?
A. 1.00
B. 2.00
Correct C. 3.00
D. 4.00

Correct Answer: C

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Question 9
A 2.00 M solution of HCl is mixed with 2.00 M solution of NaOH. What is the pH of the resulting solution?
A. 1.00
Correct B. 2.00
C. 3.00
D. 4.00

Correct Answer: B

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Question 10
A 1.00 M solution of HCl is mixed with 1.00 M solution of NaOH. What is the pH of the resulting solution?
A. 1.00
B. 2.00
Correct C. 3.00
D. 4.00

Correct Answer: C

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Question 11
A polymer is formed by the condensation reaction between a diol and a diacid. If the molecular weight of the diol is 180 g/mol and the molecular weight of the diacid is 150 g/mol, what is the molecular weight of the polymer formed?
A. 450 g/mol
B. 600 g/mol
Correct C. 900 g/mol
D. 1200 g/mol

Correct Answer: C

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Question 12
The rate cons\tant (k) for a first-order reaction is 0.05 min^-1. If the initial concentration of the reac\tant is 0.1 M, what is the concentration after 10 minutes?
A. 0.05 M
B. 0.1 M
Correct C. 0.2 M
D. 0.5 M

Correct Answer: C

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Question 13
A solution contains 20 g of NaCl in 100 mL of water. What is the molarity of the solution?
A. 0.1 M
Correct B. 0.5 M
C. 1 M
D. 5 M

Correct Answer: B

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Question 14
A sample of nitrogen gas occupies a volume of 2 L at a pressure of 1 atm. What is the pressure of the gas if the volume is reduced to 1 L?
A. 1 atm
Correct B. 2 atm
C. 3 atm
D. 4 atm

Correct Answer: B

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Question 15
A solution contains 10 g of glu\cose in 100 mL of water. What is the concentration of the solution in g/L?
A. 0.01 g/L
B. 0.1 g/L
Correct C. 1 g/L
D. 10 g/L

Correct Answer: C

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