POST UTME NILE UNIVERSITY 2024 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The electrolysis of water produces
A. hydrogen gas and oxygen gas
B. hydrogen gas and water
C. oxygen gas and water
D. hydrogen gas and carbon dioxide
Question 2
A diagram of a titration setup is shown below.
A. The burette contains the acid.
B. The beaker contains the acid.
C. The burette contains the base.
D. The beaker contains the base.
Question 3
A diagram of a titration setup is shown below. If the burette contains 0.1 M NaOH and the initial volume is 10 mL, calculate the volume of NaOH required to reach the equivalence point.
A. 20 mL
B. 30 mL
C. 40 mL
D. 50 mL
Question 4
The reaction of ozone (O3) with chlorine gas (Cl2) is an example of a ______________ reaction.
A. redox reaction
B. acid-base reaction
C. oxidation-reduction reaction
D. neutralization reaction
Question 5
The compound H2S is an example of a(n)
A. polar covalent compound
B. nonpolar covalent compound
C. ionic compound
D. metallic compound
Question 6
The electrolysis of water produces hydrogen gas at the ______________ electrode.
A. anode
B. cathode
C. both
D. neither
Question 7
The polymerization of ethene to polyethene involves the formation of a new bond between the monomer units. What type of bond is formed during this process?
A. Covalent bond
B. Ionic bond
C. Hydrogen bond
D. Van der Waals force
Question 8
A diagram of a gas law setup is shown below.
A. The gas law is Boyle's Law.
B. The gas law is Charles' Law.
C. The gas law is Gay-Lussac's Law.
D. The gas law is Avogadro's Law.
Question 9
A 25 mL sample of a solution containing 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 10
The reaction of cyclohexane with bromine in the presence of light is an example of a ______________ reaction.
A. substitution reaction
B. elimination reaction
C. addition reaction
D. substitution-elimination reaction
Question 11
The diagram below shows a titration setup for the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH). If 25 mL of 0.1 M HCl is added to the flask, what is the pH of the solution?
A. 1
B. 2
C. 3
D. 4
Question 12
The element with atomic number 12 is _______.
A. Mg
B. Ca
C. Si
D. Al
Question 13
The rate of a chemical reaction is affected by the
A. concentration of reac\tants
B. temperature of the reaction mixture
C. pressure of the reaction mixture
D. all of the above
Question 14
A solution of 0.1 M HCl is titrated with 0.1 M NaOH. If 25 cm^3 of the HCl solution requires 35 cm^3 of the NaOH solution for neutralization, calculate the number of moles of HCl in the initial solution.
A. 0.0025 mol
B. 0.005 mol
C. 0.0075 mol
D. 0.01 mol
Question 15
A 0.1 M solution of sodium hydroxide (NaOH) is prepared by dissolving 4 g of NaOH in 100 mL of water. What is the concentration of the solution in units of molarity?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M

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