POST UTME FUTA 2021 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 g sample of a metal oxide is heated in a crucible until it is completely reduced to the metal. If the mass of the metal produced is 2.0 g, what is the percentage yield of the reaction?
A. 80%
B. 90%
C. 95%
D. 98%
Question 2
A 0.1 M solution of NaCl is prepared by dissolving 2.5 g of NaCl in 100 mL of water. What is the molarity of the solution if 1.5 g of NaCl is added to the solution?
A. 0.15 M
B. 0.2 M
C. 0.25 M
D. 0.3 M
Question 3
A polymer is formed by the condensation reaction between a diol and a diacid. The molecular weight of the polymer is 50,000 g/mol. If the molecular weight of the diol is 180 g/mol and that of the diacid is 120 g/mol, calculate the number of moles of water formed during the reaction.
A. 250 moles
B. 200 moles
C. 150 moles
D. 100 moles
Question 4
A 1.00 M solution of FeCl3 is mixed with a 1.00 M solution of NaOH. If the resulting solution is 0.500 M in Fe(OH)3, what is the initial concentration of NaOH?
A. 0.500 M
B. 1.00 M
C. 2.00 M
D. 5.00 M
Question 5
The rate cons\tant 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 of the reac\tant after 10 minutes?
A. 0.01 M
B. 0.05 M
C. 0.1 M
D. 0.2 M
Question 6
A 25 mL sample of a solution containing 0.1 M NaOH is titrated with 0.1 M HCl. What is the pH of the solution after the titration?
A. 7
B. 8
C. 9
D. 10
Question 7
A polymer has a molecular weight of 50,000 g/mol and a degree of polymerization of 200. What is the molar mass of the repeating unit?
A. 100 g/mol
B. 200 g/mol
C. 250 g/mol
D. 300 g/mol
Question 8
A 1.00 M solution of a weak acid (HA) has a pH of 4.00. What is the concentration of the acid?
A. 0.0100 M
B. 0.0500 M
C. 0.100 M
D. 0.500 M
Question 9
The reaction of nitrogen dioxide with water produces nitric acid and nitric oxide. Write the balanced chemical equation for this reaction.
A. 2NO2 + H2O → HNO3 + NO
B. 2NO2 + H2O → HNO3 + NO2
C. NO2 + H2O → HNO3 + NO
D. NO2 + H2O → HNO3 + O2
Question 10
A 2.50 M solution of H2SO4 is titrated with 1.00 M NaOH. If 25.0 mL of NaOH is required to reach the equivalence point, what is the volume of H2SO4 used?
A. 10.0 mL
B. 20.0 mL
C. 25.0 mL
D. 50.0 mL
Question 11
The periodic table is arranged in a way that elements with similar properties are placed in the same group. What is the name of this group?
A. Alkali Metals
B. Alkaline Earth Metals
C. Ha\logens
D. Noble Gases
Question 12
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. -110.5 kJ/mol
C. -110.5 kJ/mol
D. -110.5 kJ/mol
Question 13
A 25 mL sample of a solution containing 0.1 M HCl is titrated with 0.1 M NaOH. What is the pH of the solution after the titration?
A. 7
B. 8
C. 9
D. 10
Question 14
A 5.0 g sample of a polymer is dissolved in 100 mL of solvent. What is the molar mass of the polymer?
A. 1000 g/mol
B. 2000 g/mol
C. 3000 g/mol
D. 4000 g/mol
Question 15
A 25.0 mL sample of 0.150 M hydrochloric acid is titrated with 0.100 M sodium hydroxide. What is the pH of the solution after the addition of 25.0 mL of the sodium hydroxide solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00

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