POST UTME MADONNA UNIVERSITY 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 25.0 mL sample of 0.500 M NaOH is titrated with 0.100 M HCl. Calculate the number of moles of HCl required.
A. 0.0125
B. 0.0250
C. 0.0375
D. 0.0500
Question 2
The rate cons\tant (k) for a first-order reaction is 0.05 min^-1. If the initial concentration of the reac\tant is 0.1 M, what is the concentration after 10 minutes?
A. 0.01 M
B. 0.05 M
C. 0.1 M
D. 0.2 M
Question 3
A 2.5 g sample of an unknown organic compound is dissolved in 25 mL of ethanol. The solution is then titrated with 0.5 M NaOH. If 15 mL of NaOH is required to reach the equivalence point, what is the molar mass of the unknown compound?
A. 50 g/mol
B. 100 g/mol
C. 150 g/mol
D. 200 g/mol
Question 4
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 5
A 0.500 M solution of NaOH is titrated with 0.500 M HCl. Calculate the pH of the solution after the addition of 25.0 mL of HCl.
A. 2.00
B. 3.00
C. 4.00
D. 5.00
Question 6
A 0.1 M solution of HCl is mixed with a 0.1 M solution of NaOH. What is the pH of the resulting solution?
A. 1
B. 2
C. 7
D. 14
Question 7
A 25 mL sample of 0.5 M H2SO4 is titrated with 1 M NaOH. Calculate the volume of NaOH required to reach the equivalence point.
A. 10 mL
B. 20 mL
C. 30 mL
D. 40 mL
Question 8
A 25 mL sample of a 0.5 M solution of H2SO4 is titrated with 1 M NaOH. Calculate the number of moles of NaOH required to reach the equivalence point.
A. 0.05 mol
B. 0.1 mol
C. 0.15 mol
D. 0.2 mol
Question 9
A metal reacts with oxygen to form a basic oxide. Which of the following metals is likely to form a basic oxide?
A. Aluminum
B. Copper
C. Zinc
D. Iron
Question 10
A 2.00 g sample of a subs\tance is found to have a mass of 2.50 g when placed in a 10.0 mL solution of 0.500 M NaOH. Calculate the molar mass of the subs\tance.
A. 20.0 g/mol
B. 30.0 g/mol
C. 40.0 g/mol
D. 50.0 g/mol
Question 11
A sample of a solid is placed in a beaker and 50 mL of water is added. The resulting solution is heated to 90°C. What is the new volume of the solution?
A. 50 mL
B. 100 mL
C. 150 mL
D. 200 mL
Question 12
A 20.0 mL sample of 0.500 M NaOH is titrated with 0.100 M HCl. Calculate the number of moles of NaOH required.
A. 0.0125
B. 0.0250
C. 0.0375
D. 0.0500
Question 13
A 2.00 M solution of HCl is prepared by dissolving 40.0 g of HCl in enough water to make 1.00 L of solution. What is the molarity of the solution?
A. 2.00 M
B. 2.50 M
C. 3.00 M
D. 3.50 M
Question 14
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 15
The reaction of zinc metal with copper(II) sulfate solution is represented by the equation: Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s). If 2.50 g of zinc metal is added to 250 mL of 0.100 M copper(II) sulfate solution, what is the limiting reac\tant?
A. Zn(s)
B. CuSO4(aq)
C. ZnSO4(aq)
D. Cu(s)

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: