POST UTME VERITAS UNIVERSITY 2021 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 25 mL sample of 0.1 M HCl is titrated with 0.1 M NaOH. Calculate the pH of the solution after 10 mL of NaOH has been added.
A. \( pH = \frac{1}{2} left\( pH_1 + pH_2 \right \ \) )
B. \( pH = \frac{1}{2} left\( pH_1 - pH_2 \right \ \) )
C. \( pH = \frac{1}{2} left\( pH_1 + pH_2 + 1 \right \ \) )
D. \( pH = \frac{1}{2} left\( pH_1 - pH_2 - 1 \right \ \) )
Question 2
Determine the rate cons\tant (k) for the reaction: A → B + C, given that the initial concentration of A is 0.1 M and the concentration of B after 10 minutes is 0.05 M, with a rate law of k[A]^2.
A. \( k = \frac{2.303}{t} \log left\( \frac{[A]_0}{[A]_t} \right \ \) )
B. \( k = \frac{2.303}{t} \log left\( \frac{[B]_t}{[B]_0} \right \ \) )
C. \( k = \frac{[A]_t - [A]_0}{t} \)
D. \( k = \frac{2.303}{t} \log left\( \frac{[A]_0}{[A]_t} \right \ \) )
Question 3
A diagram of a redox reaction is shown below. Identify the part labeled A.
A. Cell
B. Cathode
C. Anode
D. Salt Bridge
Question 4
A 1.0 L sample of 0.1 M NaOH is mixed with 1.0 L of 0.1 M HCl. Calculate the pH of the resulting solution.
A. \( pH = \frac{1}{2} left\( pH_1 + pH_2 \right \ \) )
B. \( pH = \frac{1}{2} left\( pH_1 - pH_2 \right \ \) )
C. \( pH = \frac{1}{2} left\( pH_1 + pH_2 + 1 \right \ \) )
D. \( pH = \frac{1}{2} left\( pH_1 - pH_2 - 1 \right \ \) )
Question 5
A diagram of a titration setup is shown below. Identify the part labeled A.
A. Burette
B. Beaker
C. Conical Flask
D. Erlenmeyer Flask

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