POST UTME BSU 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A sample of water contains 10 ppm of Cl- ions. What is the concentration of Cl- ions in the sample in mg/L?
A. 1
B. 2
C. 3
D. 4
Question 2
The reaction of a metal with a non-metal to form a metal oxide is an example of a ______________ reaction.
A. synthesis reaction
B. decomposition reaction
C. \single displacement reaction
D. double displacement reaction
Question 3
The reaction of a metal with a non-metal to form a metal sulfide is an example of a ______________ reaction.
A. synthesis reaction
B. decomposition reaction
C. \single displacement reaction
D. double displacement reaction
Question 4
Determine the pH of a 0.1 M solution of HCl if 25 mL of 0.1 M NaOH is added to 50 mL of the HCl solution.
A. 1
B. 2
C. 3
D. 4
Question 5
The reaction of an aldehyde with a Grignard reagent is an example of a ______________ reaction.
A. aldol reaction
B. Claisen condensation
C. Wittig reaction
D. Grignard reaction
Question 6
Determine the major product of the reaction between 2-methylpropene and HBr.
A. 2-bromo-2-methylpropane
B. 2-bromo-2-methylbu\tane
C. 2-bromo-3-methylbu\tane
D. 2-bromo-2-methylpen\tane
Question 7
The reaction of a metal with a non-metal to form a metal halide is an example of a ______________ reaction.
A. synthesis reaction
B. decomposition reaction
C. \single displacement reaction
D. double displacement reaction
Question 8
A metal (X) has an atomic number of 20 and an atomic mass of 40 g/mol. If the metal is heated in air, it forms a white solid and a gas. What is the identity of the metal and the gas formed?
A. CaO and CO2
B. MgO and H2
C. K2O and CO2
D. Na2O and H2
Question 9
A diagram of a simple black and white chemistry apparatus showing a titration setup is shown below. If 25 mL of 0.1 M HCl is added to 25 mL of 0.1 M NaOH, what is the pH of the resulting solution?
A. 7
B. 8
C. 9
D. 10
Question 10
A 2.50-g sample of a non-metallic oxide, X2O3, is heated in a stream of CO2 gas. The resulting reaction is: X2O3(s) + 3CO2(g) → 2X2(g) + 3CO(g). If the initial pressure of CO2 is 1.00 atm, and the final pressure of CO is 0.500 atm, what is the partial pressure of X2(g)?
A. 0.750 atm
B. 0.750 atm
C. 0.750 atm
D. 0.750 atm
Question 11
A 10.0 mL sample of 0.100 M NaOH is mixed with 10.0 mL of 0.100 M HCl. What is the pH of the resulting solution?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 12
The reaction of a metal with a non-metal to form a metal oxide is an example of a ______________ reaction.
A. synthesis reaction
B. decomposition reaction
C. \single displacement reaction
D. double displacement reaction
Question 13
A 0.1 M solution of CuSO4 is electrolyzed u\sing a platinum electrode. If the current is 0.5 A and the time is 10 minutes, calculate the mass of copper deposited.
A. \( m = \frac{Q \times M \times F}{n \times F} \)
B. \( m = \frac{Q \times M \times F}{n \times F} \times \frac{t}{60} \)
C. \( m = \frac{Q \times M \times F}{n \times F} \times \frac{t}{60} \times 1000 \)
D. \( m = \frac{Q \times M \times F}{n \times F} \times \frac{t}{60} \times 1000 \times 2 \)
Question 14
A polymer has the following structure: [-CH2-CH2-CH2-CH2-]n. What is the type of polymerization that occurred to form this polymer?
A. Addition polymerization
B. Condensation polymerization
C. Ring-opening polymerization
D. Step-growth polymerization
Question 15
A solution of sodium hydroxide (NaOH) is titrated with a solution of hydrochloric acid (HCl). If 25 mL of NaOH solution is required to neutralize 20 mL of HCl solution, what is the concentration of the NaOH solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M

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