POST UTME BOWEN UNIVERSITY 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10 mL sample of 0.5 M HCl is mixed with 10 mL of 0.5 M NaOH. Calculate the pH of the resulting solution.
A. 1
B. 2
C. 3
D. 4
Question 2
A 2.50 L sample of a gas at 27°C and 1.20 atm is compressed to 1.00 L at cons\tant temperature. What is the new pressure of the gas?
A. 2.40 atm
B. 2.50 atm
C. 2.60 atm
D. 2.70 atm
Question 3
A 2.5 L flask contains 0.25 mol of an ideal gas at 25°C. What is the pressure of the gas?
A. 1.01 atm
B. 2.01 atm
C. 3.01 atm
D. 4.01 atm
Question 4
The diagram below shows a simple black and white chemistry apparatus showing a titration setup.
A. The burette contains the acid.
B. The beaker contains the acid.
C. The burette contains the base.
D. The beaker contains the base.
Question 5
A solution contains 0.1 M HCl and 0.1 M NaOH. What is the pH of the solution?
A. 1
B. 2
C. 3
D. 4
Question 6
A 0.10 M solution of a salt is prepared by dissolving 0.10 mol of the salt in 1.0 L of water. What is the concentration of the salt in the solution?
A. 0.10 M
B. 0.20 M
C. 0.30 M
D. 0.40 M
Question 7
A metal atom has an atomic number of 26 and an atomic mass of 55.85 g/mol. What is the number of protons and neutrons in the nucleus of this atom?
A. 26 protons, 29 neutrons
B. 26 protons, 30 neutrons
C. 26 protons, 31 neutrons
D. 26 protons, 32 neutrons
Question 8
A 50 mL sample of a 0.2 M solution of H2SO4 is titrated with 1 M NaOH. Calculate the volume of NaOH required to reach the equivalence point.
A. 25 mL
B. 30 mL
C. 35 mL
D. 40 mL
Question 9
A 2.5 L flask contains 0.25 mol of an ideal gas at 25°C. What is the pressure of the gas?
A. 1.01 atm
B. 2.01 atm
C. 3.01 atm
D. 4.01 atm
Question 10
A solution of 0.5 M HCl is titrated with 0.2 M NaOH. If 25 mL of HCl is required to reach the equivalence point, what is the number of moles of NaOH used?
A. 0.0125
B. 0.025
C. 0.05
D. 0.1
Question 11
The reaction between nitrogen dioxide and water is represented by the equation: 3NO2 + H2O → 2HNO3 + NO. If 2.5 moles of NO2 react with excess water, what is the limiting reac\tant?
A. NO2
B. H2O
C. HNO3
D. NO
Question 12
A 1 M solution of HCl is titrated with 1 M NaOH. At the equivalence point, the pH of the solution is 7. Calculate the volume of NaOH required to reach the equivalence point.
A. 10^7
B. 10^8
C. 10^9
D. 10^10
Question 13
The reaction of an alkanol with a strong acid produces a carboxylic acid and water. If 2.0 g of the alkanol is reacted with 2.0 g of the acid, what is the limiting reac\tant?
A. Alkanol
B. Acid
C. Both are in excess
D. Neither is in excess
Question 14
A 25 mL sample of 0.5 M NaOH is mixed with 25 mL of 0.5 M HCl. Calculate the pH of the resulting solution.
A. 1
B. 2
C. 3
D. 4
Question 15
A metal is heated in a crucible and the resulting vapor is collected in a tube. The vapor is found to be a mixture of two gases, A and B. If the partial pressure of gas A is 0.50 atm and the total pressure is 1.0 atm, what is the partial pressure of gas B?
A. 0.25 atm
B. 0.50 atm
C. 0.75 atm
D. 1.0 atm

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