POST UTME UNILORIN 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A solution contains 0.1 M HCl and 0.1 M NaOH. What is the pH of the solution?
A. 7.0
B. 10.0
C. 12.0
D. 14.0
Question 2
A solution of potassium dichromate (K2Cr2O7) in water is electrolyzed u\sing a platinum electrode. The electrolysis is carried out at a cons\tant current of 2 A for 2 hours. If the density of the solution is 1.2 g/mL, calculate the mass of chromium deposited at the cathode.
A. 0.5 g
B. 1.0 g
C. 1.5 g
D. 2.0 g
Question 3
A solution of sodium carbonate, Na2CO3, has a concentration of 0.200 M. Calculate the pH of the solution.
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 4
A 0.1 M solution of a salt of a strong acid and a weak base has a pH of 8. Determine the concentration of the salt.
A. 0.01 M
B. 0.1 M
C. 1 M
D. 10 M
Question 5
A 25 mL sample of 0.5 M H2SO4 is titrated with 0.5 M NaOH. Calculate the volume of NaOH required to reach the equivalence point.
A. 12.5 mL
B. 25 mL
C. 37.5 mL
D. 50 mL
Question 6
The diagram below shows a titration setup. Identify the part labeled B.
A. Burette
B. Beaker
C. Conical Flask
D. Pipette
Question 7
A 10% solution of NaOH is prepared by dissolving 10 g of NaOH in 90 g of water. What is the molarity of the solution?
A. \( 0.1 , \text{M} \)
B. \( 0.2 , \text{M} \)
C. \( 0.3 , \text{M} \)
D. \( 0.4 , \text{M} \)
Question 8
The polymerization of styrene to polystyrene involves the addition of a monomer unit to the growing polymer chain. What is the type of polymerization reaction that occurs in this process?
A. Condensation polymerization
B. Addition polymerization
C. Ring-opening polymerization
D. Step-growth polymerization
Question 9
A solution contains 0.1 M NaCl and 0.1 M CaCl2. Calculate the molar conductivity of the solution at 25°C.
A. 0.01 S cm^2 mol^-1
B. 0.02 S cm^2 mol^-1
C. 0.03 S cm^2 mol^-1
D. 0.04 S cm^2 mol^-1
Question 10
A 1.0 M solution of HCl is mixed with a 1.0 M solution of NaOH in a 1:1 ratio. What is the resulting pH of the solution?
A. 7.0
B. 10.0
C. 12.0
D. 14.0
Question 11
The following diagram shows the structure of a colloid. What is the type of colloid?
A. Suspension
B. Emulsion
C. Foam
D. Sol
Question 12
A solution of sodium hydroxide, NaOH, has a concentration of 0.100 M. Calculate the pH of the solution.
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 13
A solution of hydrogen peroxide is decomposed by a catalyst. What is the type of reaction that occurs in this process?
A. Decomposition reaction
B. Combustion reaction
C. Neutralization reaction
D. Oxidation reaction
Question 14
A 2.5 L flask contains 0.15 mol of an ideal gas at 27°C. Calculate the pressure of the gas.
A. \( 1.01 \times 10^5 , \text{Pa} \)
B. \( 2.03 \times 10^5 , \text{Pa} \)
C. \( 3.05 \times 10^5 , \text{Pa} \)
D. \( 4.07 \times 10^5 , \text{Pa} \)
Question 15
A gas at 300 K and 1 atm is compressed to 2 atm. Calculate the final temperature of the gas.
A. 400 K
B. 500 K
C. 600 K
D. 700 K

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: