POST UTME IMS U 2021 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a titration setup 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 measure the pH of the solution
Question 2
A 5.0 M solution of HCl is mixed with a 2.0 M solution of NaOH. What is the resulting concentration of NaCl?
A. 3.0 M
B. 4.0 M
C. 5.0 M
D. 6.0 M
Question 3
The reaction between methane and oxygen to form carbon dioxide and water is an example of a reaction that involves the formation of a covalent bond. What is the type of bond that is formed between the carbon and oxygen atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals force
Question 4
Determine the molar mass of a polymer with the repeating unit [C6H5CH=CH2]n. The molar mass of the monomer unit is 106.17 g/mol.
A. 106.17 g/mol
B. 212.34 g/mol
C. 318.51 g/mol
D. 424.68 g/mol
Question 5
A 0.500 M solution of acetic acid (CH3COOH) is titrated with a 0.500 M solution of sodium hydroxide (NaOH). If 25.0 mL of NaOH is required to reach the equivalence point, what is the concentration of the acetic acid solution?
A. 0.250 M
B. 0.500 M
C. 1.00 M
D. 2.00 M
Question 6
A 10.0 g sample of a polymer is dissolved in 100.0 mL of solvent. What is the concentration of the solution in g/mL?
A. 0.1 g/mL
B. 0.2 g/mL
C. 0.3 g/mL
D. 0.4 g/mL
Question 7
The periodic table is a tabular arrangement of the elements in order of increa\sing atomic number. Which of the following is a correct explanation for the arrangement of the elements in the periodic table?
A. The elements are arranged in order of increa\sing atomic mass.
B. The elements are arranged in order of increa\sing atomic number.
C. The elements are arranged in order of decrea\sing atomic mass.
D. The elements are arranged in order of decrea\sing atomic number.
Question 8
A 0.1 M solution of CuSO4 is electrolyzed at a cons\tant current of 1.0 A for 10 minutes. If the electrolysis is carried out in a 1.0 M NaCl solution, what is the mass of Cu deposited?
A. 0.25 g
B. 0.50 g
C. 0.75 g
D. 1.0 g
Question 9
A solution of 0.1 M HCl is mixed with a solution of 0.1 M NaOH. What is the resulting pH?
A. 7
B. 10
C. 14
D. 12
Question 10
The reaction between nitrogen and oxygen to form nitrogen dioxide is an example of a reaction that involves the formation of a covalent bond. What is the type of bond that is formed between the nitrogen and oxygen atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals force
Question 11
The atomic radius of an element decreases across a period in the periodic table. Which of the following is a correct explanation for this tr\end?
A. The atomic radius decreases due to the decrease in the number of energy levels across a period.
B. The atomic radius decreases due to the increase in the effective nuclear charge across a period.
C. The atomic radius decreases due to the decrease in the atomic mass across a period.
D. The atomic radius decreases due to the increase in the number of protons across a period.
Question 12
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 13
A 25.0 mL sample of a 0.500 M solution of hydrochloric acid (HCl) is titrated with a 0.500 M solution of sodium hydroxide (NaOH). If 15.0 mL of NaOH is required to reach the equivalence point, what is the concentration of the hydrochloric acid solution?
A. 0.250 M
B. 0.500 M
C. 1.00 M
D. 2.00 M
Question 14
The boiling point of a subs\tance is a measure of the energy required to change the state of the subs\tance from liquid to gas. Which of the following is a correct explanation for the boiling point of a subs\tance?
A. The boiling point is a measure of the energy required to change the state of the subs\tance from solid to liquid.
B. The boiling point is a measure of the energy required to change the state of the subs\tance from liquid to gas.
C. The boiling point is a measure of the energy required to change the state of the subs\tance from gas to liquid.
D. The boiling point is a measure of the energy required to change the state of the subs\tance from liquid to solid.
Question 15
A 5.0 M solution of HCl is mixed with a 2.0 M solution of NaOH. What is the resulting concentration of NaCl?
A. 3.0 M
B. 4.0 M
C. 5.0 M
D. 6.0 M

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