POST UTME BABCOCK UNIVERSITY 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
At 273.15 K, 1 mole of an ideal gas occupies a volume of 22.4 L. If the temperature is increased to 373.15 K, what is the new volume of the gas, assuming it remains an ideal gas?
A. 44.8 L
B. 22.4 L
C. 11.2 L
D. 5.6 L
Question 2
A sample of a gas has a volume of 2.00 L at a temperature of 298 K. If the temperature is increased to 373 K, what is the new volume of the gas?
A. 2.00 L
B. 3.00 L
C. 4.00 L
D. 5.00 L
Question 3
A 2 M solution of HCl is titrated with 2 M NaOH. If 10 mL of NaOH is required to reach the equivalence point, what is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 4
At 25°C, the vapor pressure of a solution containing 10.0 g of urea in 100.0 g of water is 75.0 mmHg. What is the molar mass of urea?
A. 60.0 g/mol
B. 120.0 g/mol
C. 180.0 g/mol
D. 240.0 g/mol
Question 5
A sample of a hydrocarbon has a molecular formula of C5H12. What is the name of the hydrocarbon?
A. Pen\tane
B. Hexane
C. Hep\tane
D. Oc\tane
Question 6
A 2.00 M solution of NaOH is prepared by dissolving 40.0 g of NaOH in water. What is the volume of the solution in liters?
A. 1.00 L
B. 1.01 L
C. 1.02 L
D. 1.03 L
Question 7
A sample of nitrogen gas occupies a volume of 2.5 L at a pressure of 1.5 atm. What is the number of moles of nitrogen gas present?
A. 0.25 mol
B. 0.5 mol
C. 0.75 mol
D. 1.0 mol
Question 8
Determine the major product of the reaction between 2-methylpropene and HCl.
A. 1-chloro-2-methylpropane
B. 2-chloro-2-methylpropane
C. 1-chloro-2-methylpropane and 2-chloro-2-methylpropane
D. 2-chloro-2-methylpropane only
Question 9
What is the s\tandard electrode potential for the reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)?
A. -0.76 V
B. -0.34 V
C. -0.44 V
D. -0.56 V
Question 10
The reaction of 2.00 g of an unknown metal with 20.0 mL of 0.100 M HCl produces 1.00 g of H2 gas. What is the identity of the metal?
A. Mg
B. Ca
C. Fe
D. Zn
Question 11
A 0.100 M solution of NaOH is titrated with 0.100 M HCl. What is the pH of the solution after 25.0 mL of HCl has been added?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 12
Determine the rate cons\tant (k) for the reaction 2NO + O2 → 2NO2, given that the rate cons\tant at 25°C is 1.0 × 10^\( -3 \) s^\( -1 \) and the activation energy is 100 kJ/mol.
A. 1.0 × 10^\( -2 \) s^\( -1 \)
B. 1.0 × 10^\( -1 \) s^\( -1 \)
C. 1.0 × 10^\( -3 \) s^\( -1 \)
D. 1.0 × 10^\( -4 \) s^\( -1 \)
Question 13
The reaction of 2.00 g of an unknown metal with 20.0 mL of 0.100 M HCl produces 1.00 g of H2 gas. What is the identity of the metal?
A. Mg
B. Ca
C. Fe
D. Zn
Question 14
A sample of a non-metallic element has a mass of 2.50 g and a volume of 2.00 cm^3. If the density of the element is 5.50 g/cm^3, what is the molar mass of the element?
A. 32.0 g/mol
B. 32.1 g/mol
C. 32.2 g/mol
D. 32.3 g/mol
Question 15
A solution contains 0.150 M NaCl. What is the concentration of Cl- ions in the solution?
A. 0.075 M
B. 0.0750 M
C. 0.0751 M
D. 0.0752 M

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: