POST UTME VERITAS UNIVERSITY 2019 Chemistry | Objective

Are you preparing for POST UTME VERITAS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 2
A 25.0 mL sample of 0.100 M NaOH is titrated with 0.100 M HCl. What is the pH of the solution after the addition of 25.0 mL of HCl?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 3
A 2.00 g sample of an unknown metal carbonate is heated to produce a 1.50 g sample of the metal oxide. What is the molar mass of the metal carbonate?
A. 100
B. 200
Correct C. 300
D. 400

Correct Answer: C

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Question 4
A 1.00 g sample of a non-metallic element is heated in a stream of oxygen gas to produce a 2.00 g sample of the oxide. What is the molar mass of the non-metallic element?
A. 16
Correct B. 32
C. 64
D. 128

Correct Answer: B

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Question 5
A 1.00 g sample of a metal is heated in a stream of oxygen gas to produce a 2.00 g sample of the oxide. What is the molar mass of the metal?
A. 16
Correct B. 32
C. 64
D. 128

Correct Answer: B

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Question 6
At 298 K, the s\tandard Gibbs free energy change for the reaction 2NO(g) + O2(g) → 2NO2(g) is -110.6 kJ/mol. Calculate the equilibrium cons\tant (K) for the reaction.
Correct A. 1.0 x 10^12
B. 1.0 x 10^6
C. 1.0 x 10^3
D. 1.0 x 10^0

Correct Answer: A

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Question 7
A solution containing 0.10 M NaOH is titrated with 0.10 M HCl. At the equivalence point, the pH of the solution is 7.00. What is the initial pH of the NaOH solution?
A. 0.00
B. 1.00
C. 2.00
Correct D. 3.00

Correct Answer: D

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Question 8
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. The s\tandard enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the s\tandard enthalpy of formation of CH4(g)?
Correct A. -74.8 kJ/mol
B. -74.8 kJ/mol
C. -74.8 kJ/mol
D. -74.8 kJ/mol

Correct Answer: A

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Question 9
A 0.10 M solution of NaOH is titrated with 0.10 M HCl. At the equivalence point, the pH of the solution is 7.00. What is the initial pH of the NaOH solution?
A. 0.00
B. 1.00
C. 2.00
Correct D. 3.00

Correct Answer: D

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Question 10
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. The s\tandard enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the s\tandard enthalpy of formation of CH4(g)?
Correct A. -74.8 kJ/mol
B. -74.8 kJ/mol
C. -74.8 kJ/mol
D. -74.8 kJ/mol

Correct Answer: A

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Question 11
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 12
A 25 mL sample of 0.5 M H2SO4 is titrated with 1 M NaOH. Calculate the volume of NaOH required to reach the equivalence point.
A. 10 mL
Correct B. 20 mL
C. 30 mL
D. 40 mL

Correct Answer: B

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Question 13
The solubility of AgCl in water is 1.8 x 10^-5 M. Calculate the molar solubility of AgCl.
A. 1.8 x 10^-5
Correct B. 3.6 x 10^-5
C. 5.4 x 10^-5
D. 7.2 x 10^-5

Correct Answer: B

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Question 14
A 100 mL sample of 0.2 M NaOH is mixed with 100 mL of 0.1 M HCl. Calculate the pH of the resulting solution.
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 15
The half-life of a radioactive subs\tance is 5 years. Calculate the activity of the subs\tance after 10 years.
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 16
Determine the pH of a solution containing 0.1 M HCl and 0.1 M NaOH.
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 17
A 2.5 L flask contains 0.5 mol of an ideal gas at 298 K. Calculate the pressure of the gas.
A. 1 atm
B. 2 atm
Correct C. 3 atm
D. 4 atm

Correct Answer: C

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Question 18
A solution contains 0.1 M HCl and 0.1 M NaOH. What is the concentration of H+ ions in the solution?
Correct A. 0.01 M
B. 0.1 M
C. 0.5 M
D. 1 M

Correct Answer: A

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Question 19
A 2.5 L flask contains 0.5 mol of an ideal gas at 298 K. Calculate the number of moles of gas.
A. 0.2 mol
Correct B. 0.5 mol
C. 1 mol
D. 2 mol

Correct Answer: B

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Question 20
A solution contains 0.1 M HCl and 0.1 M NaOH. What is the pH of the solution?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 21
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the pH of the solution is 7. What is the initial volume of HCl in liters?
A. 0.1 L
Correct B. 0.01 L
C. 0.001 L
D. 0.0001 L

Correct Answer: B

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Question 22
A solution containing 0.1 M HCl and 0.1 M NaOH is mixed. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 23
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the volume of NaOH used is 50 mL. What is the initial volume of HCl in liters?
Correct A. 0.05 L
B. 0.01 L
C. 0.001 L
D. 0.0001 L

Correct Answer: A

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Question 24
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the pH of the solution is 7. What is the initial volume of HCl in liters?
A. 0.1 L
Correct B. 0.01 L
C. 0.001 L
D. 0.0001 L

Correct Answer: B

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Question 25
A solution containing 0.1 M HCl and 0.1 M NaOH is mixed. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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