POST UTME IMS U 2019 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 M solution of NaOH is mixed with a 2.5 M solution of HCl. What is the resulting pH of the solution?
A. 1
B. 2
C. 3
D. 4
Question 2
A 0.1 M solution of HCl is titrated with 0.1 M NaOH. If 20 mL of NaOH is required to reach the equivalence point, what is the volume of HCl in liters?
A. 0.02 L
B. 0.02 mL
C. 0.2 L
D. 0.2 mL
Question 3
A 0.1 M solution of HCl is titrated with a 0.1 M solution of NaOH. Calculate the pH of the solution after 50 mL of NaOH has been added.
A. 1
B. 2
C. 3
D. 4
Question 4
A 1.00 M solution of Ca(OH)2 is mixed with a 1.00 M solution of HCl. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 5
The reaction between H_2O and CO is given by the equation: H_2O + CO → H_2 + CO_2. What is the value of ΔH for this reaction?
A. -110 kJ/mol
B. +110 kJ/mol
C. -200 kJ/mol
D. +200 kJ/mol
Question 6
The density of a subs\tance is 2.5 g/mL. If 5 mL of the subs\tance has a mass of 12.5 g, what is the molar mass of the subs\tance?
A. 25 g/mol
B. 50 g/mol
C. 75 g/mol
D. 100 g/mol
Question 7
Calculate the molar solubility of AgCl in a 0.1 M solution of NaCl.
A. 0.01 M
B. 0.1 M
C. 1 M
D. 10 M
Question 8
A 10.0 mL sample of a 0.100 M NaOH solution is titrated with a 0.0500 M HCl solution. If the reaction is complete, what is the pH of the resulting solution?
A. 2.00
B. 3.00
C. 4.00
D. 5.00
Question 9
A 1.0 M solution of HCl is prepared by dissolving 36.5 g of HCl in 1 L of water. What is the molarity of the solution?
A. 1.0 M
B. 2.0 M
C. 3.0 M
D. 4.0 M
Question 10
A 0.500 M solution of NaOH is mixed with a 0.500 M solution of HCl. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 11
Determine the oxidation state of the chromium atom in the compound [Cr\( H_2O \)_5Cl]Cl_2.
A. +2
B. +3
C. +6
D. +7
Question 12
The diagram below shows a titration setup.
A. The burette contains NaOH.
B. The burette contains HCl.
C. The beaker contains NaOH.
D. The beaker contains HCl.
Question 13
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 14
A metal rod of length 20 cm and cross-sectional area 1.0 cm2 is heated from 20°C to 100°C. Calculate the change in entropy (ΔS) of the rod.
A. 0.10 J K-1
B. 0.20 J K-1
C. 0.30 J K-1
D. 0.40 J K-1
Question 15
In a titration experiment, 25.0 mL of 0.100 M HCl is added to 20.0 mL of 0.0500 M NaOH. If the reaction is complete, what is the concentration of the resulting solution?
A. 0.0500 M
B. 0.0625 M
C. 0.0750 M
D. 0.0875 M

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