POST UTME IGBINEDION UNIVERSITY 2018 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A metal, M, reacts with HCl to form a salt and hydrogen gas. If 2.5 g of M reacts with 10 mL of 2 M HCl, what is the molar mass of M?
A. 100 g/mol
B. 150 g/mol
C. 200 g/mol
D. 250 g/mol
Question 2
A sample of a metal with the atomic number 26 is heated in air to produce a compound with the formula M2O3. Determine the identity of the metal.
A. Iron
B. Copper
C. Manganese
D. Chromium
Question 3
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 L
C. 2 L
D. 4 L
Question 4
A solution of NaOH is prepared by dissolving 10 g of NaOH in 100 mL of water. What is the concentration of the solution in g/L?
A. 10 g/L
B. 20 g/L
C. 30 g/L
D. 40 g/L
Question 5
Determine the pH of a solution containing 0.1 M HCl and 0.1 M NaOH. Assume that the volume of the solution is 1 L.
A. 1
B. 2
C. 3
D. 4
Question 6
A 50.0 mL sample of 0.200 M HCl is titrated with 0.100 M NaOH. What is the pH of the solution after the addition of 50.0 mL of NaOH?
A. 1
B. 2
C. 3
D. 4
Question 7
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 8
A solution of 0.5 M NaOH is mixed with a solution of 0.2 M HCl. Determine the pH of the resulting solution.
A. 1
B. 2
C. 3
D. 4
Question 9
A 25.0 mL sample of 0.500 M NaOH is titrated with 0.100 M HCl. What is the pH of the solution after the addition of 25.0 mL of HCl?
A. 1
B. 2
C. 3
D. 4
Question 10
Identify the type of polymerization reaction that occurs when a monomer with the formula CH2=CH2 undergoes polymerization in the presence of a catalyst.
A. Addition polymerization
B. Condensation polymerization
C. Ring-opening polymerization
D. Step-growth polymerization
Question 11
A metal oxide, M2O3, reacts with HCl to form a salt and water. If 2.5 g of M2O3 reacts with 10 mL of 2 M HCl, what is the molar mass of M2O3?
A. 200 g/mol
B. 250 g/mol
C. 300 g/mol
D. 350 g/mol
Question 12
A 50.0 mL sample of 0.200 M NaOH is titrated with 0.100 M HCl. What is the pH of the solution after the addition of 50.0 mL of HCl?
A. 1
B. 2
C. 3
D. 4
Question 13
Calculate the number of moles of oxygen gas produced when 2.5 moles of hydrogen gas react with 1.5 moles of oxygen gas according to the equation: 2H2 + O2 → 2H2O.
A. 1.25 moles
B. 2.5 moles
C. 3.75 moles
D. 5 moles
Question 14
A 100.0 mL sample of 0.500 M HCl is titrated with 0.100 M NaOH. What is the pH of the solution after the addition of 100.0 mL of NaOH?
A. 1
B. 2
C. 3
D. 4
Question 15
Determine the type of isomerism exhibited by the compound 2,3-dimethylhexane.
A. Geometric isomerism
B. Stereoisomerism
C. Conformational isomerism
D. Structural isomerism

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