POST UTME FUTO 2021 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A mixture of 20 g of glu\cose and 10 g of fructose is dissolved in 100 mL of water. If the density of the solution is 1.2 g/mL, calculate the molality of the solution.
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 2
A 100.0 mL sample of a 0.100 M solution of a weak acid is titrated with a 0.100 M solution of a strong base. The pH of the solution after the addition of 50.0 mL of the strong base is 8.50. What is the concentration of the weak acid?
A. 0.100 M
B. 0.0500 M
C. 0.0250 M
D. 0.0125 M
Question 3
A 2.50 g sample of a metal carbonate is heated to produce a metal oxide and carbon dioxide gas. The mass of the metal oxide produced is 2.00 g. What is the molar mass of the metal carbonate?
A. 62.00 g/mol
B. 64.00 g/mol
C. 66.00 g/mol
D. 68.00 g/mol
Question 4
The s\tandard enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the s\tandard enthalpy of formation of H2(g)?
A. -285.8 kJ/mol
B. -241.8 kJ/mol
C. -393.5 kJ/mol
D. -110.5 kJ/mol
Question 5
A sample of sulfur is heated to produce sulfur dioxide gas. If 25.0 g of sulfur is heated, what is the volume of sulfur dioxide gas produced at STP?
A. ( 2.50 ) L
B. ( 5.00 ) L
C. ( 7.50 ) L
D. ( 10.0 ) L
Question 6
A 2.50 g sample of an unknown hydrocarbon is burned in a combustion calorimeter. The temperature of the calorimeter increases by 12.5°C. If the heat capacity of the calorimeter is 250 J/°C, what is the heat of combustion of the hydrocarbon?
A. -100 kJ/mol
B. -200 kJ/mol
C. -300 kJ/mol
D. -400 kJ/mol
Question 7
The atomic radius of an element in a particular period of the periodic table increases as you move from left to right. Which of the following statements is true about the atomic radius of an element in the same period?
A. It decreases as the atomic number increases.
B. It remains cons\tant as the atomic number increases.
C. It increases as the atomic number increases.
D. It decreases as the atomic number decreases.
Question 8
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. -74.8 kJ/mol
D. -283.5 kJ/mol
Question 9
The reaction between zinc metal and copper(II) sulfate solution produces a compound that is used as a pigment. What is the name of this compound?
A. Zinc Sulfate
B. Copper(II) Oxide
C. Zinc Oxide
D. Copper(II) Sulfate
Question 10
A 25.0 mL sample of 0.100 M HCl is mixed with a 25.0 mL sample of 0.100 M NaOH. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 11
The diagram below shows a titration setup. What is the purpose of the burette?
A. To measure the volume of the unknown solution
B. To measure the volume of the known solution
C. To mix the unknown and known solutions
D. To separate the unknown solution from the known solution
Question 12
A sample of gas occupies a volume of 2.50 L at a pressure of 1.00 atm and a temperature of 298 K. If the pressure is increased to 2.00 atm while the temperature remains cons\tant, what is the new volume of the gas?
A. ( 1.25 ) L
B. ( 2.50 ) L
C. ( 3.75 ) L
D. ( 5.00 ) L
Question 13
At 273.15 K, the volume of 1 mole of an ideal gas is 22.4 L. What is the volume of 2 moles of the same gas at the same temperature?
A. 44.8 L
B. 45.6 L
C. 44.8 L
D. 45.6 L
Question 14
A solution contains 10 g of NaCl in 100 mL of water. If the density of the solution is 1.2 g/mL, calculate the molarity of the solution.
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 15
In a titration experiment, 25.0 mL of 0.100 M HCl was added to 20.0 mL of 0.0500 M NaOH. If the reaction is complete, what is the pH of the resulting solution?
A. ( 2.00 )
B. ( 3.00 )
C. ( 4.00 )
D. ( 5.00 )

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: