POST UTME MOUNTAIN TOP UNIVERSITY 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A redox reaction involves the transfer of electrons from one species to another. What is the name of the species that loses electrons?
A. Oxidizing Agent
B. Reducing Agent
C. Electron Donor
D. Electron Acceptor
Question 2
The reaction of sodium with water is highly exothermic and produces hydrogen gas. Write the balanced chemical equation for this reaction, including the state of each subs\tance.
A. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
B. 2Na(s) + 2H2O(l) → 2NaOH(aq) + 2H2(g)
C. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2O(g)
D. 2Na(s) + 2H2O(l) → 2NaOH(aq) + 2O2(g)
Question 3
A colloidal solution of starch in water is known as?
A. Starch paste
B. Starch solution
C. Starch dispersion
D. Starch emulsion
Question 4
A 2.00 L sample of a gas at 25°C and 1.00 atm is collected over water. If the vapor pressure of water at 25°C is 0.0313 atm, what is the partial pressure of the gas?
A. 0.968 atm
B. 0.974 atm
C. 0.980 atm
D. 0.986 atm
Question 5
A solution contains 0.500 M NaCl. What is the concentration of Cl^- ions in the solution?
A. 0.250 M
B. 0.500 M
C. 0.750 M
D. 1.00 M
Question 6
The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. Calculate the s\tandard enthalpy of formation of CaCO3(s) u\sing the following reaction: CaO(s) + CO2(g) → CaCO3(s).
A. -1206.5 kJ/mol
B. -1206.0 kJ/mol
C. -1207.0 kJ/mol
D. -1208.0 kJ/mol
Question 7
The s\tandard entropy of formation of H2(g) is 130.7 J/mol·K. Calculate the s\tandard entropy of combustion of hydrogen gas (H2(g)) u\sing the following reaction: 2H2(g) + O2(g) → 2H2O(l).
A. -285.8 J/mol·K
B. -286.3 J/mol·K
C. -287.8 J/mol·K
D. -289.3 J/mol·K
Question 8
A 2.00 g sample of a non-metallic element is found to have a density of 4.50 g/cm^3. Calculate the volume of the sample in cubic centimeters.
A. 0.444 cm^3
B. 0.444 L
C. 0.444 mL
D. 0.444 m^3
Question 9
A solution contains 5.0 g of glu\cose (C6H12O6) per 100 mL. What is the molarity of the solution?
A. 0.1 M
B. 0.5 M
C. 1 M
D. 5 M
Question 10
What is the major product of the reaction between 2-methylpropane and HCl?
A. 2-chloro-2-methylpropane
B. 2-methyl-2-chloropropane
C. 2-methyl-1-chloropropane
D. 2-methyl-2-chlorobu\tane
Question 11
A 25.0 g sample of a metal carbonate is heated to produce a metal oxide and carbon dioxide gas. If the metal oxide has a molar mass of 100 g/mol, and the carbon dioxide gas has a molar mass of 44.0 g/mol, calculate the number of moles of carbon dioxide gas produced.
A. 0.500 mol
B. 1.00 mol
C. 1.50 mol
D. 2.00 mol
Question 12
A 25 mL sample of a solution containing 0.1 M NaCl is diluted to 100 mL. What is the new concentration of the solution?
A. 0.01 M
B. 0.1 M
C. 0.5 M
D. 1 M
Question 13
A solution of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the pH after 25.0 mL of NaOH has been added.
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 14
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
D. 4
Question 15
A 50 mL sample of a solution containing 0.2 M HCl is mixed with 50 mL of a solution containing 0.1 M NaOH. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4

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: