POST UTME CRAWFORD UNIVERSITY 2018 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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?
A. 7
B. 8
C. 9
D. 10
Question 2
What is the pH of a 0.1 M solution of HCl?
A. 0.1
B. 1
C. 10
D. 100
Question 3
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
C. 10 g/L
D. 100 g/L
Question 4
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
B. 75,000 g/mol
C. 25,000 g/mol
D. 10,000 g/mol
Question 5
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
B. 0.2 M
C. 0.5 M
D. 1.0 M
Question 6
A diagram of a redox reaction is shown below. What is the oxidation state of the manganese atom in the compound?
A. +2
B. +3
C. +4
D. +5
Question 7
Determine the major product of the reaction between 2-methylpropene and HCl.
A. 1-chloro-2-methylpropane
B. 2-chloro-2-methylpropane
C. 1-chloro-2-methylbu\tane
D. 2-chloro-2-methylbu\tane
Question 8
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
B. 0.025 M
C. 0.0125 M
D. 0.0075 M
Question 9
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?
A. 7
B. 8
C. 9
D. 10
Question 10
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
B. 200 cm^3
C. 400 cm^3
D. 800 cm^3
Question 11
A diagram of a titration apparatus is shown below. What is the purpose of the pipette?
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
Question 12
A diagram of a titration apparatus is shown below. What is the purpose of the burette?
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
Question 13
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?
A. 7
B. 8
C. 9
D. 10
Question 14
Determine the major product of the reaction between 2-methylpropene and HBr.
A. 1-bromo-2-methylpropane
B. 2-bromo-2-methylpropane
C. 1-bromo-3-methylbu\tane
D. 2-bromo-3-methylbu\tane
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
B. +0.5 V
C. +1.0 V
D. +1.5 V

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