POST UTME KSU 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 25.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the number of moles of NaOH required to reach the equivalence point.
A. 0.0025
B. 0.0050
C. 0.0075
D. 0.0100
Question 2
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)) = -178.2 kJ/mol.
A. -1206.8 kJ/mol
B. -1206.9 kJ/mol
C. -1206.7 kJ/mol
D. -1206.6 kJ/mol
Question 3
A 1.00 M solution of NaOH is titrated with a 1.00 M solution of HCl. What is the pH of the solution after the addition of 50.0 mL of HCl?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 4
The pH of a solution is 4.5. What is the concentration of hydrogen ions in the solution?
A. 1.0 x 10^\( -4 \) M
B. 1.0 x 10^\( -5 \) M
C. 1.0 x 10^\( -6 \) M
D. 1.0 x 10^\( -7 \) M
Question 5
A metal $M$ has a s\tandard electrode potential of $-0.5, \text{V}$. What is the s\tandard electrode potential of $M^{2+}$?
A. $-1.0, \text{V}$
B. $-0.5, \text{V}$
C. $0.0, \text{V}$
D. $1.0, \text{V}$
Question 6
The diagram below shows a setup for the electrolysis of water.
A. O2 is produced at the anode
B. H2 is produced at the cathode
C. O2 is produced at the cathode
D. H2 is produced at the anode
Question 7
The reaction between chlorine gas and sodium hydroxide solution is represented by the equation: Cl2 + 2NaOH → NaCl + NaClO + H2O. What is the oxidation state of chlorine in the product NaClO?
A. 0
B. +1
C. +2
D. +3
Question 8
A solution of $0.1, \text{mol}, \text{dm}^{-3}$ of $NaOH$ is mixed with a solution of $0.2, \text{mol}, \text{dm}^{-3}$ of $HCl$. If the volume of the resulting solution is $100, \text{cm}^3$, calculate the concentration of $OH^-$ ions.
A. $0.002, \text{mol}, \text{dm}^{-3}$
B. $0.01, \text{mol}, \text{dm}^{-3}$
C. $0.02, \text{mol}, \text{dm}^{-3}$
D. $0.05, \text{mol}, \text{dm}^{-3}$
Question 9
A solution of $0.1, \text{mol}, \text{dm}^{-3}$ of $NaOH$ is mixed with a solution of $0.2, \text{mol}, \text{dm}^{-3}$ of $HCl$. If the volume of the resulting solution is $100, \text{cm}^3$, calculate the concentration of $OH^-$ ions.
A. $0.002, \text{mol}, \text{dm}^{-3}$
B. $0.01, \text{mol}, \text{dm}^{-3}$
C. $0.02, \text{mol}, \text{dm}^{-3}$
D. $0.05, \text{mol}, \text{dm}^{-3}$
Question 10
A 0.500 M solution of NaOH is titrated with a 0.500 M solution of HCl. What is the pH of the solution after the addition of 25.0 mL of HCl?
A. 2.00
B. 2.50
C. 3.00
D. 3.50
Question 11
The diagram below shows a titration setup.
A. The burette is used to measure the volume of the titrant.
B. The beaker is used to measure the volume of the analyte.
C. The burette is used to measure the volume of the analyte.
D. The beaker is used to measure the volume of the titrant.
Question 12
A solution of $0.1, \text{mol}, \text{dm}^{-3}$ of $NaOH$ is mixed with a solution of $0.2, \text{mol}, \text{dm}^{-3}$ of $HCl$. If the volume of the resulting solution is $100, \text{cm}^3$, calculate the concentration of $H^+$ ions.
A. $0.002, \text{mol}, \text{dm}^{-3}$
B. $0.01, \text{mol}, \text{dm}^{-3}$
C. $0.02, \text{mol}, \text{dm}^{-3}$
D. $0.05, \text{mol}, \text{dm}^{-3}$
Question 13
The diagram below shows a cell with a salt bridge.
A. The cell is a galvanic cell.
B. The cell is an electrolytic cell.
C. The salt bridge is used to connect the two half-cells.
D. The salt bridge is used to separate the two half-cells.
Question 14
A metal X reacts with chlorine gas to form a white solid. The reaction is represented by the equation: X + Cl2 → XCl2. What is the oxidation state of metal X in the product XCl2?
A. +1
B. +2
C. +3
D. +4
Question 15
A metal $M$ has a s\tandard electrode potential of $-0.5, \text{V}$. What is the s\tandard electrode potential of $M^{2+}$?
A. $-1.0, \text{V}$
B. $-0.5, \text{V}$
C. $0.0, \text{V}$
D. $1.0, \text{V}$

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: