POST UTME FUTA 2020 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Determine the s\tandard potential of the cell represented by the following reaction: MnO4- + 8H+ + 5e- → Mn2+ + 4H2O. Given that the s\tandard reduction potential of MnO4- is +1.23 V and the s\tandard reduction potential of Mn2+ is -1.18 V.
A. +1.05 V
B. +1.18 V
C. +1.23 V
D. +1.28 V
Question 2
A 2.5 L flask contains 0.5 mol of an ideal gas at 300 K. If the gas is heated to 400 K at cons\tant volume, what is the new pressure?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 3
A 1.0 M solution of NaOH is prepared by dissolving 40.0 g of NaOH in 1.0 L of water. What is the concentration of the solution in terms of molarity?
A. 0.1 M
B. 0.5 M
C. 1.0 M
D. 2.0 M
Question 4
The polymerization of styrene \( C6H5CH=CH2 \) produces a polymer with the following structure: [-C6H4CH=CH-]n. If the polymer has a molecular weight of 100,000 g/mol, calculate the degree of polymerization.
A. 500
B. 1000
C. 2000
D. 5000
Question 5
The reaction of cyclohexane with bromine in the presence of light produces a mixture of 1,2-dibromocyclohexane and 1,4-dibromocyclohexane. If 2.50 g of cyclohexane reacts with 2.00 g of bromine, and the reaction yields 1.50 g of 1,2-dibromocyclohexane, calculate the percentage yield of 1,2-dibromocyclohexane.
A. 70%
B. 80%
C. 90%
D. 95%
Question 6
A solution contains 5.0 g of NaCl in 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 7
A 0.500 M solution of sodium hydroxide (NaOH) is titrated with a 0.250 M solution of hydrochloric acid (HCl). If 25.0 mL of HCl is required to reach the equivalence point, calculate the number of moles of NaOH present in 50.0 mL of the solution.
A. 0.0100 mol
B. 0.0150 mol
C. 0.0200 mol
D. 0.0250 mol
Question 8
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. Calculate the s\tandard enthalpy of combustion of 1.0 g of carbon at 298 K.
A. -32.8 kJ
B. -33.2 kJ
C. -34.5 kJ
D. -35.9 kJ
Question 9
The rate cons\tant of 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. 0.02 M
C. 0.03 M
D. 0.04 M
Question 10
The s\tandard enthalpy of formation of CO2 is -393.5 kJ/mol. If 1 mole of CO2 is formed at cons\tant pressure, what is the change in internal energy?
A. -393.5 kJ
B. -394.5 kJ
C. -395.5 kJ
D. -396.5 kJ
Question 11
A solution of 0.2 M HCl is titrated with 0.2 M NaOH. If 30 mL of the base is required to reach the equivalence point, calculate the volume of the acid required to reach the equivalence point.
A. 30 mL
B. 40 mL
C. 50 mL
D. 60 mL
Question 12
A 0.500 M solution of NaOH is titrated with a 0.250 M solution of HCl. If 25.0 mL of HCl is required to reach the equivalence point, calculate the number of moles of NaOH present in 50.0 mL of the solution.
A. 0.0100 mol
B. 0.0150 mol
C. 0.0200 mol
D. 0.0250 mol
Question 13
The reaction of cyclohexane with bromine in the presence of light produces a mixture of 1,2-dibromocyclohexane and 1,4-dibromocyclohexane. If 2.50 g of cyclohexane reacts with 2.00 g of bromine, and the reaction yields 1.50 g of 1,2-dibromocyclohexane, calculate the percentage yield of 1,4-dibromocyclohexane.
A. 70%
B. 80%
C. 90%
D. 95%
Question 14
A 1.0 M solution of sodium nitrate (NaNO3) is mixed with a 1.0 M solution of potassium chloride (KCl). Calculate the molar concentration of the resulting solution.
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
Question 15
A 2.0 M solution of sodium hydroxide (NaOH) is mixed with a 1.0 M solution of hydrochloric acid (HCl). Calculate the pH of the resulting solution.
A. 1.0
B. 2.0
C. 3.0
D. 4.0

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