POST UTME SUMMIT UNIVERSITY 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a titration setup is shown below. Identify the part labeled B.
A. A burette
B. A pipette
C. A flask
D. A beaker
Question 2
A solution contains 0.250 mol of NaCl in 1.00 L of water. Calculate the molarity of the solution.
A. 0.250 M
B. 0.250 M
C. 0.250 M
D. 0.250 M
Question 3
A solution of sodium hydroxide is titrated with a solution of hydrochloric acid. The initial pH of the solution is 12.0. Calculate the pH after the addition of 25.0 mL of 1.00 M hydrochloric acid.
A. 10.5
B. 11.0
C. 11.5
D. 12.0
Question 4
A 2.00 L flask contains 0.150 mol of CO2 at 25°C. Calculate the pressure of the gas u\sing the ideal gas law.
A. 1.01 x 10^5 Pa
B. 1.01 x 10^5 Pa
C. 1.01 x 10^5 Pa
D. 1.01 x 10^5 Pa
Question 5
A 2.50 L flask contains 0.150 mol of an ideal gas at 25°C. Calculate the pressure of the gas u\sing the ideal gas law.
A. 1.01 x 10^5 Pa
B. 1.01 x 10^5 Pa
C. 1.01 x 10^5 Pa
D. 1.01 x 10^5 Pa
Question 6
A sample of nitrogen gas is collected over water at a temperature of 298 K and a pressure of 1.00 atm. Calculate the partial pressure of the nitrogen gas.
A. 0.95 atm
B. 0.90 atm
C. 0.85 atm
D. 0.80 atm
Question 7
Determine the s\tandard enthalpy of formation of CaCO3(s) from the following data: ΔHf(CaO(s)) = -635.09 kJ/mol, ΔHf(CO2(g)) = -393.51 kJ/mol, ΔHf(Ca(s)) = 0 kJ/mol.
A. -1206.60 kJ/mol
B. -1206.60 kJ/mol
C. -1206.60 kJ/mol
D. -1206.60 kJ/mol
Question 8
A diagram of a titration setup is shown below. Identify the part labeled A.
A. A burette
B. A pipette
C. A flask
D. A beaker
Question 9
A redox reaction involves the oxidation of bromine water to bromine gas and the reduction of silver nitrate solution to silver metal. Write the balanced half-equations for the oxidation and reduction reactions.
A. 2Ag+(aq) + 2e- → 2Ag(s)
B. 2Ag+(aq) + 2e- → 2Ag(s)
C. 2Ag+(aq) + 2e- → 2Ag(s)
D. 2Ag+(aq) + 2e- → 2Ag(s)
Question 10
A solution contains 0.250 mol of NaCl in 1.00 L of water. Calculate the molarity of the solution.
A. 0.250 M
B. 0.250 M
C. 0.250 M
D. 0.250 M

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