POST UTME IMS U 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A solution containing 0.150 M CaCl2 is mixed with a solution containing 0.150 M Na2SO4. What is the concentration of Ca^2+ ions in the resulting solution?
A. 0.0750 M
B. 0.0755 M
C. 0.0760 M
D. 0.0765 M
Question 2
The pH of a solution is 3. If the concentration of H+ ions is 1.0 x 10^\( -3 \) M, calculate the pOH of the solution.
A. 11
B. 10
C. 9
D. 8
Question 3
A solution contains 0.50 g of glu\cose (C6H12O6) per 100 mL of solution. What is the molarity of the solution?
A. 0.25 M
B. 0.50 M
C. 1.0 M
D. 2.0 M
Question 4
The reaction between sodium (Na) and chlorine (Cl2) produces sodium chloride (NaCl). Write the balanced chemical equation for this reaction.
A. 2Na + Cl2 → 2NaCl
B. Na + Cl2 → NaCl
C. 2NaCl + Cl2 → 2Na
D. NaCl + Cl2 → Na
Question 5
A 25.0 mL sample of 0.5 M hydrochloric acid (HCl) is titrated with 1.0 M sodium hydroxide (NaOH). Calculate the number of moles of NaOH required to reach the equivalence point.
A. 0.0125
B. 0.0250
C. 0.0375
D. 0.0500
Question 6
A 1.0 M solution of H2SO4 is mixed with a 1.0 M solution of NaOH. What is the resulting solution?
A. Na2SO4 and H2O
B. NaHSO4 and H2O
C. Na2SO4 and NaOH
D. NaHSO4 and NaOH
Question 7
The boiling point of a solution containing 10% w/w of a non-volatile solute in water is 102.5°C. What is the molality of the solution?
A. m = 1.0 m
B. m = 2.0 m
C. m = 3.0 m
D. m = 4.0 m
Question 8
A 25 mL sample of a solution containing 0.1 M NaOH is titrated with 0.1 M HCl. What is the pH of the solution after the titration?
A. pH = 1
B. pH = 7
C. pH = 10
D. pH = 12
Question 9
The molar mass of a subs\tance is 50 g/mol. If a 2.0 g sample has a volume of 10 cm^3, calculate the density of the subs\tance.
A. 5 g/cm^3
B. 10 g/cm^3
C. 15 g/cm^3
D. 20 g/cm^3
Question 10
A diagram of a titration setup is shown below. What is the concentration of the NaOH solution?
A. 0.100 M
B. 0.200 M
C. 0.300 M
D. 0.400 M
Question 11
The concentration of a solution is 0.5 M. If a 10 cm^3 sample has a mass of 5 g, calculate the molar mass of the subs\tance.
A. 100 g/mol
B. 200 g/mol
C. 300 g/mol
D. 400 g/mol
Question 12
The pH of a solution is 4. If the concentration of H+ ions is 1.0 x 10^\( -4 \) M, calculate the pOH of the solution.
A. 10
B. 9
C. 8
D. 7
Question 13
A 1.0 M solution of NaOH is mixed with a 1.0 M solution of HCl. What is the pH of the resulting solution?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 14
The equilibrium cons\tant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g) is 1.8 x 10^\( -5 \) at 300 K. If the initial concentrations of N2 and H2 are 0.5 M and 1.5 M, respectively, calculate the equilibrium concentration of NH3.
A. 0.15 M
B. 0.30 M
C. 0.45 M
D. 0.60 M
Question 15
Determine the concentration of a 0.5 M solution of NaOH that has been diluted to 1.5 L. What is the new concentration in units of M?
A. 0.25 M
B. 0.33 M
C. 0.5 M
D. 1.0 M

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