POST UTME BABCOCK UNIVERSITY 2025 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 0.5 M solution of sodium hydroxide is mixed with a 0.5 M solution of hydrochloric acid. What is the resulting pH of the solution?
A. 1
B. 2
C. 3
D. 4
Question 2
A diagram of a titration setup is shown below. If 25 mL of 0.1 M sodium hydroxide is added to the solution, what is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 3
A 10.0 mL sample of a 0.100 M solution of sodium hydroxide is mixed with 20.0 mL of a 0.0500 M solution of hydrochloric acid. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 4
A 0.5 M solution of a weak acid HA is mixed with a 0.2 M solution of a strong base NaOH. If the initial volume of the acid solution is 50 mL and the initial volume of the base solution is 100 mL, what is the pH of the resulting solution after complete neutralization?
A. 3.5
B. 4.5
C. 5.5
D. 6.5
Question 5
A 2.0 M solution of a non-electrolyte solute is prepared by dissolving 40 g of the solute in 100 mL of water. What is the molarity of the solution?
A. 1.0 M
B. 2.0 M
C. 3.0 M
D. 4.0 M
Question 6
A solution of sodium chloride (NaCl) has a concentration of 0.500 M. If 25.0 mL of the solution is diluted to a total volume of 100.0 mL, what is the new concentration of the solution?
A. 0.250 M
B. 0.500 M
C. 0.750 M
D. 1.00 M
Question 7
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. What is the s\tandard enthalpy of formation of CO(g)?
A. -110.5 kJ/mol
B. -393.5 kJ/mol
C. 110.5 kJ/mol
D. 393.5 kJ/mol
Question 8
A sample of a non-metallic element has a mass of 2.5 g and a volume of 10 mL. If the density of the element is 5.0 g/mL, what is the molar mass of the element?
A. 50 g/mol
B. 100 g/mol
C. 150 g/mol
D. 200 g/mol
Question 9
A solution contains 10.0 g of glu\cose per 100 mL of water. What is the molarity of the solution?
A. 0.2 M
B. 0.5 M
C. 1.0 M
D. 2.0 M
Question 10
A sample of a ha\logen has a mass of 2.50 g. If the mass of the sample is 1.25 g, what is the mass of the ha\logen in the sample?
A. 1.25 g
B. 1.50 g
C. 1.75 g
D. 2.00 g
Question 11
A solution contains 5.0 g of NaCl per 100 mL of water. What is the molarity of the solution?
A. 0.1 M
B. 0.5 M
C. 1.0 M
D. 2.0 M
Question 12
The solubility of lead(II) chloride in water is 1.26 g/100 mL at 25°C. What is the molar solubility of lead(II) chloride?
A. 0.0126 M
B. 0.126 M
C. 1.26 M
D. 12.6 M
Question 13
A diagram of a titration setup is shown below. If 25 mL of 0.1 M sodium hydroxide is added to the solution, what is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 14
The molecular formula for a compound containing nitrogen and oxygen is C2H4N2O2. If 2.50 g of the compound contains 0.750 g of nitrogen, calculate the percentage composition of nitrogen in the compound.
A. 14.29%
B. 15.38%
C. 16.67%
D. 17.86%
Question 15
The reaction of cyclohexane with bromine in the presence of light produces a mixture of 1-bromocyclohexane and cis-1,2-dibromocyclohexane. What is the major product of this reaction?
A. 1-bromocyclohexane
B. cis-1,2-dibromocyclohexane
C. trans-1,2-dibromocyclohexane
D. cyclohexene

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: