POST UTME ELIZADE UNIVERSITY 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A sample of a hydrocarbon has a molecular formula of C4H10. What is the expected boiling point of this hydrocarbon?
A. 20°C
B. 50°C
C. 100°C
D. 150°C
Question 2
A 25.0 cm3 sample of a solution containing 0.100 M sodium hydroxide is titrated with 0.100 M hydrochloric acid. If 25.0 cm3 of hydrochloric acid is required to reach the equivalence point, what is the concentration of the sodium hydroxide?
A. 0.100 M
B. 0.200 M
C. 0.500 M
D. 1.00 M
Question 3
A 1.00 M solution of sodium chloride (NaCl) is mixed with a 2.00 M solution of silver nitrate (AgNO3). What is the expected precipitate formed in this reaction?
A. AgCl
B. NaNO3
C. AgNO3
D. NaCl
Question 4
The compound SO2 is a product of the reaction between sulfur and oxygen. What is the oxidation state of sulfur in this compound?
A. 0
B. +2
C. -2
D. +4
Question 5
The compound SO3 is a product of the reaction between sulfur trioxide and water. What is the oxidation state of sulfur in this compound?
A. +6
B. +4
C. +2
D. 0
Question 6
A metal (M) reacts with oxygen gas to form a white solid. The reaction is as follows: 4M + 3O2 → 2M2O3. If 2.50 g of M2O3 is produced from 1.50 g of M, what is the molar mass of M?
A. 20.0 g/mol
B. 25.0 g/mol
C. 30.0 g/mol
D. 35.0 g/mol
Question 7
A solution of 0.1 M NaCl is electrolyzed u\sing a platinum electrode. What is the mass of chlorine gas produced at the anode after 2 hours?
A. 1.2 g
B. 2.4 g
C. 3.6 g
D. 4.8 g
Question 8
A 1.00 M solution of NaOH is titrated with 0.500 M HCl. If 25.0 mL of HCl is required to reach the equivalence point, what is the pH of the solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 9
A 25.0 cm3 sample of sulfuric acid is titrated with 0.100 M sodium hydroxide. If 25.0 cm3 of sodium hydroxide is required to reach the equivalence point, what is the concentration of the sulfuric acid?
A. 0.100 M
B. 0.200 M
C. 0.500 M
D. 1.00 M
Question 10
A 10% solution of glu\cose is prepared by dissolving 10 g of glu\cose in 90 g of water. What is the molarity of the solution?
A. 0.1 M
B. 0.5 M
C. 1.0 M
D. 5.0 M
Question 11
The reaction of cyclohexane with bromine in the presence of light produces a dibromocyclohexane. What is the major product of this reaction?
A. 1,2-dibromocyclohexane
B. 1,4-dibromocyclohexane
C. cis-1,2-dibromocyclohexane
D. trans-1,2-dibromocyclohexane
Question 12
In a redox reaction, what is the role of the oxidizing agent?
A. To donate electrons
B. To accept electrons
C. To facilitate the reaction
D. To inhibit the reaction
Question 13
A 2.0 L flask contains 0.5 mol of a gas at 25°C. Calculate the pressure of the gas in atm.
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 14
The reaction of an alkene with ozone produces a ozonide. What is the name of this reaction?
A. Ozonolysis
B. Ozonation
C. Ozonation of alkenes
D. Ozonation of alkynes
Question 15
A sample of a non-metallic oxide has a mass of 25.0 g and a volume of 2.5 L at STP. Calculate the molar mass of the oxide.
A. 50 g/mol
B. 75 g/mol
C. 100 g/mol
D. 125 g/mol

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