POST UTME FUTO 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Determine the pH of a 0.1 M solution of sulfuric acid (H2SO4) at 25°C, given that the dissociation cons\tant (Ka) of H2SO4 is 1.2 × 10^\( -2 \).
A. 1.2
B. 1.5
C. 1.8
D. 2.0
Question 2
The s\tandard enthalpy of formation of NH3(g) is -45.9 kJ/mol. What is the s\tandard enthalpy of formation of N2(g) if the s\tandard enthalpy of formation of H2(g) is 0 kJ/mol?
A. 0 kJ/mol
B. -45.9 kJ/mol
C. -92.0 kJ/mol
D. -169.8 kJ/mol
Question 3
A solution of NaCl is prepared by dissolving 35.5 g of NaCl in 250 mL of water. What is the molarity of the solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 4
A 2.00 L sample of a solution containing 0.100 M NaCl is diluted to a volume of 5.00 L. Calculate the new concentration of the solution.
A. 0.0200 M
B. 0.0400 M
C. 0.0600 M
D. 0.0800 M
Question 5
The solubility of a subs\tance is defined as the maximum amount of the subs\tance that can dissolve in a given amount of solvent at a particular temperature. What is the unit of solubility?
A. g/L
B. mol/L
C. g/mol
D. L/mol
Question 6
A 2.5 M solution of HCl is mixed with a 2.5 M solution of NaOH. Calculate the pH of the resulting solution after the reaction is complete, given that the dissociation cons\tant of HCl is 10^-7.
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 7
A sample of a hydrocarbon \( C_xH_y \) has a molecular weight of 42 g/mol. If the density of the sample is 0.8 g/mL, what is the volume of the sample in liters?
A. 50 mL
B. 100 mL
C. 200 mL
D. 250 mL
Question 8
Determine the number of moles of CO2 produced when 2.5 g of C6H12O6 is completely oxidized in the presence of excess O2, given that the balanced equation for the reaction is: C6H12O6 + 6O2 → 6CO2 + 6H2O. The molar mass of C6H12O6 is 180 g/mol.
A. 0.0175 mol
B. 0.0225 mol
C. 0.0275 mol
D. 0.0325 mol
Question 9
A 10 mL sample of a 0.1 M solution of sodium hydroxide (NaOH) is titrated with a 0.1 M solution of hydrochloric acid (HCl). What is the pH of the solution after the titration?
A. 7.0
B. 8.0
C. 9.0
D. 10.0
Question 10
A gas is collected over water at a temperature of 25°C and a pressure of 1 atm. If the vapor pressure of water at 25°C is 23.8 mmHg, what is the partial pressure of the gas?
A. 1 atm - 0.0313 atm
B. 1 atm - 0.0314 atm
C. 1 atm - 0.0315 atm
D. 1 atm - 0.0316 atm
Question 11
A mixture of 2.5 g of glu\cose (C6H12O6) and 1.5 g of fructose (C6H12O6) is dissolved in 100 mL of water. What is the osmotic pressure of the solution at 25°C?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 12
A 2.0 g sample of a metal oxide is heated in a stream of carbon dioxide. The mass of the oxide decreases by 0.5 g, and the mass of the carbon dioxide increases by 0.3 g. What is the empirical formula of the oxide?
A. CO
B. CO2
C. C2O
D. C3O2
Question 13
A polymer has a molecular weight of 100,000 g/mol and a degree of polymerization of 500. Calculate the molar mass of the repeating unit.
A. 100 g/mol
B. 200 g/mol
C. 500 g/mol
D. 1000 g/mol
Question 14
A sample of a polymer (polyethylene) has a molecular weight of 100,000 g/mol. If the density of the sample is 0.9 g/mL, what is the volume of the sample in liters?
A. 100 mL
B. 200 mL
C. 300 mL
D. 400 mL
Question 15
A 2 L solution contains 0.5 M HCl. Calculate the pH of the solution.
A. 1
B. 2
C. 3
D. 4

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