POST UTME CRAWFORD UNIVERSITY 2018 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
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
Question 3
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 4
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 5
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 6
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 7
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 8
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 9
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 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 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 12
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 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 HCl.
A. 1-chloro-2-methylpropane
B. 2-chloro-2-methylpropane
C. 1-chloro-2-methylbu\tane
D. 2-chloro-2-methylbu\tane
Question 15
What is the pH of a 0.1 M solution of HCl?
A. 0.1
B. 1
C. 10
D. 100

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