POST UTME ELIZADE UNIVERSITY 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 L flask contains 0.5 mol of a gas at 25°C. Calculate the pressure of the gas in atm.
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 2
A solution contains 0.100 M sodium chloride and 0.100 M calcium chloride. What is the concentration of chloride ions in the solution?
A. 0.100 M
B. 0.200 M
C. 0.300 M
D. 0.400 M
Question 3
A 10.0 mL sample of a 0.1 M NaOH solution is titrated with a 0.1 M HCl solution. What is the pH of the solution after the titration?
A. 7
B. 8
C. 9
D. 10
Question 4
A solution of 0.1 M NaCl is electrolyzed u\sing a platinum electrode. What is the mass of chlorine gas produced at the anode after 2 hours?
A. 1.2 g
B. 2.4 g
C. 3.6 g
D. 4.8 g
Question 5
The compound SO2 is a product of the reaction between sulfur and oxygen. What is the oxidation state of sulfur in this compound?
A. 0
B. +2
C. -2
D. +4
Question 6
The reaction between chlorine gas and sodium hydroxide solution produces a compound that is used as a di\sinfec\tant. What is the name of the compound produced?
A. Chloramine
B. Sodium chloride
C. Chlorine gas
D. Sodium hypochlorite
Question 7
The compound SO3 is a product of the reaction between sulfur trioxide and water. What is the oxidation state of sulfur in this compound?
A. +6
B. +4
C. +2
D. 0
Question 8
Determine the number of moles of oxygen gas (O2) produced at STP when 2.5 moles of hydrogen gas (H2) react with oxygen gas according to the equation: 2H2 + O2 → 2H2O.
A. 1.25 moles
B. 2.5 moles
C. 5 moles
D. 10 moles
Question 9
A 1.0 L flask contains 0.2 mol of a gas at 50°C. Calculate the pressure of the gas in atm.
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 10
The following diagram shows a titration setup. 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 11
The equilibrium cons\tant (Kc) for the reaction N2(g) + 3H2(g) → 2NH3(g) is 0.042 at 298 K. What is the equilibrium cons\tant (Kp) for the reaction?
A. 0.042
B. 0.042 atm
C. 0.042 atm^3
D. 0.042 atm^2
Question 12
A 2.0 L flask contains 0.5 mol of a gas at 25°C. Calculate the pressure of the gas in atm.
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 13
A 10% solution of glu\cose is prepared by dissolving 10 g of glu\cose in 90 g of water. What is the molarity of the solution?
A. 0.1 M
B. 0.5 M
C. 1.0 M
D. 5.0 M
Question 14
In a redox reaction, what is the role of the oxidizing agent?
A. To donate electrons
B. To accept electrons
C. To facilitate the reaction
D. To inhibit the reaction
Question 15
A 2.00 M solution of a strong acid is titrated with 0.500 M NaOH. If 25.0 mL of the acid is required to reach the equivalence point, what is the molarity of the acid?
A. 1.00 M
B. 1.25 M
C. 1.50 M
D. 2.00 M

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: