POST UTME FUTO 2019 Chemistry | Objective

Are you preparing for POST UTME FUTO 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 mL sample of 0.5 M NaOH is titrated with 0.5 M HCl. What is the pH of the solution after the addition of 20 mL of HCl?
Correct A. 1
B. 2
C. 3
D. 4

Correct Answer: A

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Question 3
A polymer has a molecular weight of 100,000 g/mol. If 1 g of the polymer is dissolved in 100 mL of water, what is the concentration of the solution in g/L?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 4
A solution of 0.1 M NaCl is prepared by dissolving 0.1 g of NaCl in 100 mL of water. What is the concentration of the solution in g/L?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 5
A 25 mL sample of 0.5 M NaOH is titrated with 0.5 M HCl. What is the pH of the solution after the addition of 20 mL of HCl?
Correct A. 1
B. 2
C. 3
D. 4

Correct Answer: A

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Question 6
A 0.1 M solution of a weak base, B, is titrated with 0.1 M HCl. If 20 mL of 0.1 M HCl is required to reach the equivalence point, calculate the number of moles of B initially present in 100 mL of the solution.
A. 0.0015 mol
Correct B. 0.0020 mol
C. 0.0025 mol
D. 0.0030 mol

Correct Answer: B

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Question 7
A metal, M, reacts with chlorine gas to form a white solid. The reaction is as follows: M + Cl2 → MX2. If 2.5 g of M is reacted with 2.5 g of Cl2, what is the mass of the white solid formed?
A. 5.0 g
B. 5.5 g
Correct C. 6.0 g
D. 6.5 g

Correct Answer: C

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Question 8
A 2.0 M solution of a weak acid, HA, is titrated with 2.0 M NaOH. If 20 mL of 2.0 M NaOH is required to reach the equivalence point, calculate the pH of the solution at the equivalence point.
A. 7.0
B. 7.5
Correct C. 8.0
D. 8.5

Correct Answer: C

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Question 9
A metal, M, reacts with oxygen gas to form a brown solid. The reaction is as follows: 4M + 3O2 → 2MO3. If 2.5 g of M is reacted with 2.5 g of O2, what is the mass of the brown solid formed?
A. 5.0 g
B. 5.5 g
Correct C. 6.0 g
D. 6.5 g

Correct Answer: C

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Question 10
A 1.0 M solution of a weak base, B, is titrated with 1.0 M HCl. If 20 mL of 1.0 M HCl is required to reach the equivalence point, calculate the number of moles of B initially present in 100 mL of the solution.
A. 0.0015 mol
Correct B. 0.0020 mol
C. 0.0025 mol
D. 0.0030 mol

Correct Answer: B

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Question 11
Determine the number of moles of $\text{O}_2$ produced at $25^\circ\text{C}$ and $1.00\text{ atm}$ when $2.50\text{ g}$ of $\text{KClO}_3$ is decomposed according to the equation $\text{KClO}_3\( s)\rightarrow\text{KCl}\( s \ \)+\frac{3}{2}\text{O}_2(g)$
A. 0.125 mol
Correct B. 0.250 mol
C. 0.500 mol
D. 1.00 mol

Correct Answer: B

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Question 12
A $0.500\text{ M}$ solution of $\text{NaOH}$ is mixed with a $0.500\text{ M}$ solution of $\text{HCl}$. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
Correct D. 4.00

Correct Answer: D

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Question 13
A $1.00\text{ L}$ container is filled with $0.500\text{ mol}$ of $\text{CO}_2$ at $25^\circ\text{C}$. What is the partial pressure of $\text{CO}_2$ in the container?
A. 0.500 atm
Correct B. 1.00 atm
C. 2.00 atm
D. 3.00 atm

Correct Answer: B

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Question 14
A $2.00\text{ M}$ solution of $\text{H}_2\text{SO}_4$ is mixed with a $1.00\text{ M}$ solution of $\text{Ba(OH)}_2$. What is the resulting concentration of $\text{SO}_4^{2-}$ ions?
A. 0.500 M
B. 1.00 M
C. 1.50 M
Correct D. 2.00 M

Correct Answer: D

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Question 15
A $1.00\text{ L}$ container is filled with $0.500\text{ mol}$ of $\text{N}_2$ at $25^\circ\text{C}$. What is the volume of the container if the pressure is increased to $2.00\text{ atm}$?
A. 0.250 L
B. 0.500 L
C. 1.00 L
Correct D. 2.00 L

Correct Answer: D

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Question 16
A $2.00\text{ M}$ solution of $\text{H}_2\text{SO}_4$ is mixed with a $1.00\text{ M}$ solution of $\text{Ba(OH)}_2$. What is the resulting concentration of $\text{H}^+$ ions?
A. 0.500 M
B. 1.00 M
C. 1.50 M
Correct D. 2.00 M

Correct Answer: D

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Question 17
A $1.00\text{ L}$ container is filled with $0.500\text{ mol}$ of $\text{CO}_2$ at $25^\circ\text{C}$. What is the partial pressure of $\text{CO}_2$ in the container?
A. 0.500 atm
Correct B. 1.00 atm
C. 2.00 atm
D. 3.00 atm

Correct Answer: B

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Question 18
A $2.00\text{ M}$ solution of $\text{H}_2\text{SO}_4$ is mixed with a $1.00\text{ M}$ solution of $\text{Ba(OH)}_2$. What is the resulting concentration of $\text{SO}_4^{2-}$ ions?
A. 0.500 M
B. 1.00 M
C. 1.50 M
Correct D. 2.00 M

Correct Answer: D

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Question 19
A $1.00\text{ L}$ container is filled with $0.500\text{ mol}$ of $\text{N}_2$ at $25^\circ\text{C}$. What is the volume of the container if the pressure is increased to $2.00\text{ atm}$?
A. 0.250 L
B. 0.500 L
C. 1.00 L
D. 2.00 L

Correct Answer: VIEW ANSWER

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Question 20
The entropy change (ΔS) for a reaction is given by the equation ΔS = ΔnRΔT. If the reaction is carried out at cons\tant temperature \( T = 298 K \), what is the effect on the entropy change (ΔS) if the number of moles of gas (n) is doubled?
A. The entropy change (ΔS) will decrease.
Correct B. The entropy change (ΔS) will increase.
C. The entropy change (ΔS) will remain the same.
D. The entropy change (ΔS) will become negative.

Correct Answer: B

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Question 21
A sample of polyethylene (C2H4)n is subjected to a temperature of 500°C. What is the expected change in the polymer's molecular weight?
A. The molecular weight will decrease.
Correct B. The molecular weight will increase.
C. The molecular weight will remain the same.
D. The molecular weight will become negative.

Correct Answer: B

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Question 22
A 2.50 g sample of sulfur (S8) is burned in oxygen to produce sulfur dioxide (SO2). The reaction is carried out at cons\tant pressure. What is the volume of SO2 produced at 25°C and 1 atm?
A. 1.00 L
Correct B. 2.00 L
C. 3.00 L
D. 4.00 L

Correct Answer: B

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Question 23
A 10.0 g sample of iron (Fe) is heated in a crucible to produce iron(III) oxide (Fe2O3). The reaction is carried out at cons\tant temperature. What is the mass of Fe2O3 produced?
A. 20.0 g
B. 30.0 g
Correct C. 40.0 g
D. 50.0 g

Correct Answer: C

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Question 24
A 5.00 L sample of hydrogen gas (H2) is collected over water at 25°C and 1 atm. What is the partial pressure of hydrogen gas (H2) in the sample?
A. 0.500 atm
B. 0.750 atm
Correct C. 1.00 atm
D. 1.25 atm

Correct Answer: C

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Question 25
A 10.0 g sample of sodium chloride (NaCl) is dissolved in 100.0 g of water. What is the concentration of the solution in terms of molarity?
A. 0.100 M
B. 0.500 M
Correct C. 1.00 M
D. 2.00 M

Correct Answer: C

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