POST UTME FUTA 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A solution contains 0.1 M NaCl and 0.2 M NaNO3. What is the concentration of Na+ ions in the solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 2
A 2.5 M solution of NaOH is titrated with 0.5 M HCl. Calculate the pH of the solution after 25 mL of HCl has been added.
A. 2.5
B. 3.5
C. 4.5
D. 5.5
Question 3
A 10% solution of NaCl is prepared by dissolving 10 g of NaCl in 90 g of water. What is the molarity of the solution?
A. 0.1 M
B. 0.1 M
C. 0.1 M
D. 0.1 M
Question 4
A 25.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the pH of the solution after 25.0 mL of NaOH has been added.
A. 2.00
B. 2.50
C. 3.00
D. 3.50
Question 5
A sample of CO2 gas is collected over water at a temperature of 25°C and a pressure of 1 atm. Calculate the mole \fraction of CO2 in the gas mixture.
A. 0.5
B. 0.75
C. 1
D. 1.25
Question 6
A 1.0 M solution of NaOH is titrated with a 1.0 M solution of HCl. What is the pH of the solution after 25 mL of HCl has been added?
A. 1
B. 2
C. 3
D. 4
Question 7
A 2.5 g sample of a non-metallic oxide, X2O3, is dissolved in 50 mL of 0.1 M HCl. The resulting solution is then titrated with 0.1 M NaOH. If 25 mL of NaOH is required to reach the equivalence point, what is the molar mass of X?
A. 120 g/mol
B. 120 g/mol
C. 120 g/mol
D. 120 g/mol
Question 8
Determine the s\tandard enthalpy of formation of CaCO3(s) from the following data: ΔHf(CaO(s)) = -635.09 kJ/mol, ΔHf(CO2(g)) = -393.51 kJ/mol.
A. -1206.60 kJ/mol
B. -1206.61 kJ/mol
C. -1206.59 kJ/mol
D. -1206.62 kJ/mol
Question 9
A catalyst is added to a reaction mixture containing 1.0 M H2 and 1.0 M O2. The reaction is allowed to proceed until 50% of the H2 has been consumed. What is the concentration of H2O produced?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
Question 10
The diagram below shows a circuit. What is the purpose of the resistor?
A. To reduce the voltage
B. To increase the current
C. To reduce the current
D. To increase the voltage
Question 11
Determine the s\tandard enthalpy of formation of CaCO3(s) from the following data: ΔHf(CaO(s)) = -635.09 kJ/mol, ΔHf(CO2(g)) = -393.51 kJ/mol. Assume the reaction is: CaO(s) + CO2(g) → CaCO3(s).
A. -1207.6 kJ/mol
B. -1207.6 kJ/mol
C. -1207.6 kJ/mol
D. -1207.6 kJ/mol
Question 12
A polymer is formed by the condensation reaction between two monomers, A and B. If the molecular weight of the polymer is 2000 g/mol and the molecular weights of the monomers are 150 g/mol and 300 g/mol, respectively, what is the average degree of polymerization?
A. 4
B. 6
C. 8
D. 10
Question 13
A 10% solution of NaCl is prepared by dissolving 10 g of NaCl in 90 g of water. Calculate the molality of the solution.
A. 0.1 m
B. 0.5 m
C. 1 m
D. 5 m
Question 14
A solution contains 0.1 M NaCl and 0.2 M NaNO3. What is the concentration of Cl- ions in the solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 15
A 2.5 g sample of a polymer is dissolved in 100 mL of water. What is the molar mass of the polymer?
A. 1000 g/mol
B. 2000 g/mol
C. 5000 g/mol
D. 10000 g/mol

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