POST UTME FUTO 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. What is the s\tandard enthalpy of formation of H2O(l) if the s\tandard enthalpy of formation of H2(g) is 0 kJ/mol and the s\tandard enthalpy of formation of O2(g) is 0 kJ/mol?
A. -285.8 kJ/mol
B. -241.8 kJ/mol
C. -393.5 kJ/mol
D. -572.8 kJ/mol
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 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 4
The diagram below shows a titration setup. Identify the subs\tance being titrated.
A. HCl
B. NaOH
C. H2SO4
D. HNO3
Question 5
The diagram below shows a titration setup. What is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 6
A sample of a hydrocarbon has a molecular formula of C4H10. If 1.0 g of the hydrocarbon is burned in a bomb calorimeter, and the heat released is 2.5 kJ/g, calculate the s\tandard enthalpy of combustion of the hydrocarbon.
A. -2800 kJ/mol
B. -2900 kJ/mol
C. -3000 kJ/mol
D. -3100 kJ/mol
Question 7
A solution of acetic acid (CH3COOH) is prepared by dissolving 10 g of CH3COOH in 100 mL of water. What is the pH of the solution?
A. 2.5
B. 2.8
C. 3.0
D. 3.2
Question 8
A solution of HCl is prepared by dissolving 25.0 g of HCl 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 9
A gas at a pressure of 2 atm and a temperature of 300 K expands to a volume of 5 L. What is the final pressure of the gas?
A. 1.0 atm
B. 1.5 atm
C. 2.0 atm
D. 2.5 atm
Question 10
A 0.1 M solution of NaOH is prepared by dissolving 4 g of NaOH in water and diluting to a total volume of 1 L. Calculate the molarity of the solution.
A. 0.1 M
B. 0.2 M
C. 0.4 M
D. 0.8 M
Question 11
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 12
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 13
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 14
A sample of a hydrocarbon is found to have the molecular formula C5H12. What is the type of hydrocarbon?
A. Alkane
B. Alkene
C. Alkyne
D. Aromatic hydrocarbon
Question 15
A 2.5 g sample of a non-metallic 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

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