POST UTME BABCOCK UNIVERSITY 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 g sample of glu\cose is dissolved in water to produce a solution. If the solution has a concentration of 0.5 M, what is the volume of the solution?
A. 4.0 mL
B. 5.0 mL
C. 6.0 mL
D. 7.0 mL
Question 2
A diagram of a titration setup is shown below.
A. NaOH
B. HCl
C. H2SO4
D. CH3COOH
Question 3
A 2.00 M solution of HCl(aq) is mixed with a 2.00 M solution of NaOH(aq) in a 1:1 ratio. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 4
A 2.50 g sample of a metal carbonate is heated to produce 1.25 g of the metal oxide. What is the molar mass of the metal carbonate?
A. 100 g/mol
B. 150 g/mol
C. 200 g/mol
D. 250 g/mol
Question 5
A 1.00 L sample of a 0.100 M solution of NaCl(aq) is mixed with a 1.00 L sample of a 0.100 M solution of AgNO3(aq). What is the concentration of the resulting solution?
A. 0.0500 M
B. 0.100 M
C. 0.150 M
D. 0.200 M
Question 6
A 2.00 g sample of a metal is heated to produce 1.00 g of the metal oxide. What is the molar mass of the metal?
A. 50.0 g/mol
B. 75.0 g/mol
C. 100 g/mol
D. 125 g/mol
Question 7
A 2.00 g sample of a metal carbonate is heated to produce 1.00 g of the metal oxide. What is the molar mass of the metal carbonate?
A. 100 g/mol
B. 150 g/mol
C. 200 g/mol
D. 250 g/mol
Question 8
A 0.1 M solution of a weak acid HA is mixed with 0.1 M NaOH. If the initial pH of the acid is 3.5, what is the pH of the solution after the reaction is complete?
A. 4.5
B. 5.5
C. 6.5
D. 7.5
Question 9
A redox reaction involves the oxidation of Fe2+ to Fe3+ and the reduction of MnO4- to Mn2+. If the initial concentration of Fe2+ is 0.1 M and the initial concentration of MnO4- is 0.01 M, what is the ratio of the concentrations of Fe3+ to Mn2+ after the reaction is complete?
A. 1:1
B. 1:10
C. 10:1
D. 100:1
Question 10
A 3.0 g sample of sodium chloride is dissolved in water to produce a solution. If the solution has a density of 1.2 g/mL, what is the volume of the solution?
A. 2.5 mL
B. 3.0 mL
C. 3.5 mL
D. 4.0 mL
Question 11
A 3.0 g sample of sodium hydroxide is dissolved in water to produce a solution. If the solution has a pH of 13.5, what is the concentration of the solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 12
A solution of 0.1 M CuSO4 is electrolyzed u\sing a platinum electrode. What is the mass of copper deposited at the cathode after 2 hours?
A. 0.5 g
B. 1.0 g
C. 2.0 g
D. 4.0 g
Question 13
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 14
A 1.00 L sample of a 0.100 M solution of HCl(aq) is mixed with a 1.00 L sample of a 0.100 M solution of NaOH(aq). What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 15
A 3.0 g sample of sodium carbonate is dissolved in water to produce a solution. If the solution has a pH of 10.5, what is the concentration of the solution?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M

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