POST UTME VERITAS UNIVERSITY 2019 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. The s\tandard enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the s\tandard enthalpy of formation of CH4(g)?
A. -74.8 kJ/mol
B. -74.8 kJ/mol
C. -74.8 kJ/mol
D. -74.8 kJ/mol
Question 2
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the volume of NaOH used is 50 mL. What is the initial volume of HCl in liters?
A. 0.05 L
B. 0.01 L
C. 0.001 L
D. 0.0001 L
Question 3
A 25 mL sample of 0.5 M H2SO4 is titrated with 1 M NaOH. Calculate the volume of NaOH required to reach the equivalence point.
A. 10 mL
B. 20 mL
C. 30 mL
D. 40 mL
Question 4
A solution containing 0.1 M HCl and 0.1 M NaOH is mixed. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 5
A solution containing 0.1 M HCl and 0.1 M NaOH is mixed. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 6
A solution of a weak base B is 20% dissociated. If the concentration of the solution is 0.1 M, calculate the pOH of the solution.
A. 1.0
B. 1.5
C. 2.0
D. 2.5
Question 7
A 0.10 M solution of NaOH is titrated with 0.10 M HCl. At the equivalence point, the pH of the solution is 7.00. What is the initial pH of the NaOH solution?
A. 0.00
B. 1.00
C. 2.00
D. 3.00
Question 8
A 1.00 g sample of a non-metallic element is heated in a stream of oxygen gas to produce a 2.00 g sample of the oxide. What is the molar mass of the non-metallic element?
A. 16
B. 32
C. 64
D. 128
Question 9
A metal M has a s\tandard electrode potential of +0.5 V. What is the potential of the cell when a solution of M2+ ions is in contact with a solution of M3+ ions?
A. -0.5 V
B. 0.0 V
C. +0.5 V
D. +1.0 V
Question 10
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the pH of the solution is 7. What is the initial volume of HCl in liters?
A. 0.1 L
B. 0.01 L
C. 0.001 L
D. 0.0001 L
Question 11
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 12
The half-life of a radioactive subs\tance is 5 years. Calculate the activity of the subs\tance after 10 years.
A. 1
B. 2
C. 3
D. 4
Question 13
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 14
A 2.00 g sample of an unknown metal carbonate is heated to produce a 1.50 g sample of the metal oxide. What is the molar mass of the metal carbonate?
A. 100
B. 200
C. 300
D. 400
Question 15
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. At the equivalence point, the pH of the solution is 7. What is the initial volume of HCl in liters?
A. 0.1 L
B. 0.01 L
C. 0.001 L
D. 0.0001 L

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