POST UTME COAL CITY UNIVERSITY 2020 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
A 10 mL sample of 0.5 M HCl is titrated with 0.5 M NaOH. What is the pH of the solution after the reaction is complete?
A. 1
B. 2
C. 3
D. 4
Question 3
The diagram below shows the titration curve of a weak acid HA with a strong base NaOH.
A. The equivalence point is at pH 7.
B. The equivalence point is at pH 10.
C. The equivalence point is at pH 12.
D. The equivalence point is at pH 14.
Question 4
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 5
A 0.1 M solution of a weak acid HA is mixed with 0.1 M NaOH. If the initial pH of the acid solution is 4.5, what is the pH after the reaction is complete?
A. 4.5
B. 5.5
C. 6.5
D. 7.5
Question 6
A gas at 25°C and 1 atm is compressed to 2 atm. What is the new volume of the gas?
A. 0.5 L
B. 1.0 L
C. 2.0 L
D. 4.0 L
Question 7
A 25 mL sample of 0.5 M H2SO4 is titrated with 0.5 M NaOH. What is the pH of the solution after the reaction is complete?
A. 1
B. 2
C. 3
D. 4
Question 8
A 25 mL sample of 0.5 M H2SO4 is titrated with 0.5 M NaOH. What is the pH of the solution after the reaction is complete?
A. 1
B. 2
C. 3
D. 4
Question 9
A 1.0 M solution of a weak acid HA is mixed with a 1.0 M solution of a strong base NaOH. If the initial pH of the acid solution is 2.0, what is the pH of the resulting solution after the reaction is complete?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 10
A 0.1 M solution of a weak base B is mixed with a 0.1 M solution of a strong acid HCl. If the initial pOH of the base solution is 4.0, what is the pOH of the resulting solution after the reaction is complete?
A. 2.0
B. 3.0
C. 4.0
D. 5.0
Question 11
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 12
Determine the type of reaction that occurs when 1-bromopropane reacts with sodium hydroxide in an aqueous solution.
A. Substitution reaction
B. Elimination reaction
C. Addition reaction
D. Condensation reaction
Question 13
What is the molar mass of a compound with the empirical formula C2H4O?
A. 28
B. 44
C. 60
D. 72
Question 14
A 2.0 g sample of a hydrocarbon is burned in a bomb calorimeter, relea\sing 12.5 kJ of heat energy. If the molar mass of the hydrocarbon is 42.0 g/mol, what is the heat of combustion per mole of the hydrocarbon?
A. -300 kJ/mol
B. -400 kJ/mol
C. -500 kJ/mol
D. -600 kJ/mol
Question 15
A 25 mL sample of 0.5 M H2SO4 is titrated with 0.5 M NaOH. What is the pH of the solution after the reaction is complete?
A. 1
B. 2
C. 3
D. 4

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