POST UTME AL-HIKMAH UNIVERSITY 2018 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 1.0 M solution of HCl is prepared by dissolving 36.5 g of HCl in 1000 mL of water. What is the pH of the solution?
A. 0.5
B. 1.0
C. 1.5
D. 2.0
Question 2
Calculate the pH of a 0.1 M solution of HCl.
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 3
A metal M has a density of 7.5 g/cm^3. If a 2.5 cm^3 sample of the metal has a mass of 17.5 g, what is the molar mass of the metal?
A. 100 g/mol
B. 200 g/mol
C. 300 g/mol
D. 400 g/mol
Question 4
Determine the oxidation state of nitrogen in the compound NO2.
A. +2
B. +1
C. -1
D. +3
Question 5
A 5.00 M solution of sulfuric acid (H2SO4) is titrated with a 2.00 M solution of sodium hydroxide (NaOH). What is the pH of the resulting solution after the reaction is complete?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 6
The rate cons\tant of a reaction is 0.05 s^-1. If the initial concentration of the reac\tant is 0.1 M, what is the concentration of the reac\tant after 10 minutes?
A. 0.01 M
B. 0.05 M
C. 0.1 M
D. 0.2 M
Question 7
A 25 mL sample of 0.5 M HCl is titrated with 0.5 M NaOH. Calculate the pH at the equivalence point.
A. 7
B. 8
C. 9
D. 10
Question 8
Determine the number of stereocenters in the compound below. If the compound is chiral, indicate the configuration of each stereocenter.
A. 2 stereocenters, R,R configuration
B. 2 stereocenters, S,S configuration
C. 1 stereocenter, R configuration
D. 1 stereocenter, S configuration
Question 9
A 2.0 L flask contains 1.0 atm of CO2 at 298 K. What is the partial pressure of CO2 in the flask?
A. 1.0 atm
B. 1.5 atm
C. 2.0 atm
D. 2.5 atm
Question 10
A 10 mL sample of 0.5 M HCl is mixed with 10 mL of 0.5 M NaOH. What is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 11
A solution of 0.1 M NaOH is titrated with 0.1 M HCl. What is the pH of the solution after the addition of 50 mL of HCl?
A. 1
B. 2
C. 3
D. 4
Question 12
A 25.0 mL sample of a 0.100 M solution of sodium hydroxide (NaOH) is titrated with a 0.100 M solution of hydrochloric acid (HCl). What is the pH of the resulting solution after the reaction is complete?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 13
A solution of 0.1 M NaOH is titrated with 0.1 M HCl. What is the pH of the solution after the addition of 50 mL of NaOH?
A. 1
B. 2
C. 3
D. 4
Question 14
A metal M reacts with chlorine gas to form a white solid. The reaction is as follows: M + Cl_2 -> MX_2. If 2.5 g of M reacts with 1.5 g of Cl_2, what is the mass of MX_2 formed?
A. 3.75 g
B. 2.5 g
C. 1.5 g
D. 4.5 g
Question 15
A solution contains 0.1 M HCl and 0.1 M NaOH. Calculate the pH of the solution.
A. 1
B. 2
C. 3
D. 4

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