POST UTME IMS U 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A sample of a hydrocarbon has a molecular formula of C4H10. If the density of the sample is 0.65 g/mL, what is the molar mass of the hydrocarbon?
A. 74 g/mol
B. 84 g/mol
C. 94 g/mol
D. 104 g/mol
Question 2
The half-life of a radioactive subs\tance is 5 years. If 100 g of the subs\tance is present initially, how much will be left after 15 years?
A. 25 g
B. 50 g
C. 75 g
D. 100 g
Question 3
A 1.0 M solution of HCl is mixed with a 1.0 M solution of NaOH. If the initial concentrations of H+ and OH- ions are 1.0 M each, what is the pH of the resulting solution?
A. 0
B. 1
C. 2
D. 3
Question 4
A 0.1 M solution of AgNO3 is mixed with a 0.1 M solution of NaCl. If the initial concentrations of Ag+ and Cl- ions are 0.1 M each, what is the concentration of AgCl formed after the reaction is complete?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 5
A 1.0 M solution of HCl is titrated with a 0.5 M solution of NaOH. What is the pH of the solution after 20 mL of NaOH has been added?
A. 1
B. 2
C. 3
D. 4
Question 6
What is the major product of the reaction between ethene and bromine?
A. 1,2-dibromoethane
B. 1,1-dibromoethane
C. 1,3-dibromoethane
D. 1,4-dibromoethane
Question 7
A sample of a compound with the molecular formula C2H4O2 is analyzed by GC-MS and found to have a molecular ion peak at m/z 60. What is the structure of the compound?
A. CH3COCH3
B. CH3COOH
C. CH3CH2OH
D. CH3COOCH3
Question 8
A 2.0 g sample of a metal carbonate is heated to produce a metal oxide and carbon dioxide gas. If the metal oxide has a molar mass of 120 g/mol and the reaction is 100% efficient, what is the mass of the metal oxide produced?
A. 1.2 g
B. 1.5 g
C. 1.8 g
D. 2.0 g
Question 9
A 2.0 L flask contains 0.5 mol of an ideal gas at a temperature of 300 K. What is the pressure of the gas?
A. 2.5 atm
B. 3.5 atm
C. 4.5 atm
D. 5.5 atm
Question 10
A solution contains 0.1 M H2SO4 and 0.1 M NaOH. What is the pH of the solution?
A. 1
B. 2
C. 3
D. 4
Question 11
Calculate the s\tandard enthalpy change for the reaction: 2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s). The s\tandard enthalpies of formation for the reac\tants and products are: ΔHf(Al(s)) = -1261 kJ/mol, ΔHf(Fe2O3(s)) = -826 kJ/mol, ΔHf(Fe(s)) = 0 kJ/mol, and ΔHf(Al2O3(s)) = -1676 kJ/mol.
A. -1454 kJ/mol
B. -1754 kJ/mol
C. -1654 kJ/mol
D. -1554 kJ/mol
Question 12
A solution of 0.1 M HCl is mixed with a solution of 0.1 M NaOH. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 13
A diagram of a titration setup is shown below. If 25.0 mL of 0.100 M NaOH is required to reach the equivalence point, what is the concentration of the HCl solution?
A. 0.0500 M
B. 0.100 M
C. 0.200 M
D. 0.500 M
Question 14
What is the correct order of electron affinity for the ha\logens?
A. F > Cl > Br > I
B. I > Br > Cl > F
C. F > Br > Cl > I
D. I > Cl > Br > F
Question 15
A diagram of a simple black and white chemistry apparatus showing a titration setup is shown below. If 25.0 mL of 0.100 M NaOH is required to reach the equivalence point, what is the concentration of the HCl solution?
A. 0.0500 M
B. 0.100 M
C. 0.200 M
D. 0.500 M

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