POST UTME CRAWFORD UNIVERSITY 2018 Chemistry | Objective

Are you preparing for POST UTME CRAWFORD UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
Determine the major product of the reaction between 2-methylpropene and HBr.
Correct A. 1-bromo-2-methylpropane
B. 2-bromo-2-methylpropane
C. 1-bromo-3-methylbu\tane
D. 2-bromo-3-methylbu\tane

Correct Answer: A

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Question 2
The half-life of a first-order reaction is 20 minutes. If the initial concentration of the reac\tant is 0.1 M, what is the concentration after 40 minutes?
A. 0.05 M
Correct B. 0.025 M
C. 0.0125 M
D. 0.0075 M

Correct Answer: B

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Question 3
A 0.1 M solution of NaOH is mixed with a 0.1 M solution of HCl. What is the pH of the resulting solution?
Correct A. 7
B. 8
C. 9
D. 10

Correct Answer: A

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Question 4
A diagram of a titration setup is shown below. If 25 mL of 0.1 M NaOH is used to titrate 25 mL of 0.1 M HCl, what is the pH of the resulting solution?
Correct A. 7
B. 8
C. 9
D. 10

Correct Answer: A

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Question 5
A diagram of a redox reaction is shown below. What is the oxidation state of the manganese atom in the compound?
A. +2
Correct B. +3
C. +4
D. +5

Correct Answer: B

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Question 6
Determine the major product of the reaction between 2-methylpropene and HCl.
Correct A. 1-chloro-2-methylpropane
B. 2-chloro-2-methylpropane
C. 1-chloro-2-methylbu\tane
D. 2-chloro-2-methylbu\tane

Correct Answer: A

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Question 7
What is the pH of a 0.1 M solution of HCl?
A. 0.1
Correct B. 1
C. 10
D. 100

Correct Answer: B

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Question 8
A 25.0 mL sample of 0.5 M NaOH is titrated with 1.0 M HCl. What is the pH of the solution after the titration?
Correct A. 7
B. 8
C. 9
D. 10

Correct Answer: A

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Question 9
A diagram of a titration apparatus is shown below. What is the purpose of the burette?
Correct A. To measure the volume of the titrant
B. To measure the volume of the analyte
C. To mix the titrant and analyte
D. To separate the titrant and analyte

Correct Answer: A

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Question 10
A diagram of a titration apparatus is shown below. What is the purpose of the pipette?
A. To measure the volume of the titrant
Correct B. To measure the volume of the analyte
C. To mix the titrant and analyte
D. To separate the titrant and analyte

Correct Answer: B

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Question 11
A polymer is formed by the condensation reaction between two monomers, A and B. If the molecular weight of the polymer is 100,000 g/mol and the molecular weight of monomer A is 50,000 g/mol, what is the molecular weight of monomer B?
A. 50,000 g/mol
Correct B. 75,000 g/mol
C. 25,000 g/mol
D. 10,000 g/mol

Correct Answer: B

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Question 12
A solution of NaOH is titrated with a solution of HCl. If 25 mL of NaOH solution is required to neutralize 50 mL of HCl solution, what is the concentration of the HCl solution?
A. 0.1 M
Correct B. 0.2 M
C. 0.5 M
D. 1.0 M

Correct Answer: B

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Question 13
A metal M has a density of 8 g/cm^3 and a molar mass of 200 g/mol. What is the volume of 1 mole of M in cm^3?
A. 100 cm^3
Correct B. 200 cm^3
C. 400 cm^3
D. 800 cm^3

Correct Answer: B

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Question 14
A solution of NaCl is prepared by dissolving 10 g of NaCl in 100 mL of water. What is the concentration of the solution in g/L?
A. 0.1 g/L
B. 1.0 g/L
Correct C. 10 g/L
D. 100 g/L

Correct Answer: C

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Question 15
A metal M has a s\tandard reduction potential of +0.5 V. What is the s\tandard cell potential of a cell consisting of M/M^2+ and Zn^2+/Zn?
A. -0.5 V
Correct B. +0.5 V
C. +1.0 V
D. +1.5 V

Correct Answer: B

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