POST UTME FUTA 2022 Chemistry | Objective

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Question 1
A 25 mL sample of a 0.1 M NaOH solution is titrated with 0.1 M HCl. Calculate the number of moles of HCl required to neutralize the NaOH.
A. 0.0025 mol
B. 0.005 mol
C. 0.01 mol
D. 0.02 mol
Question 2
The reaction of zinc metal with copper(II) sulfate solution is represented by the equation: Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s). Calculate the number of moles of copper metal deposited from a solution containing 2.5 g of copper(II) sulfate.
A. 0.0156 mol
B. 0.0312 mol
C. 0.0625 mol
D. 0.125 mol
Question 3
The half-life of a radioactive subs\tance is 10.0 days. If 50 g of the subs\tance is initially present, calculate the amount of the subs\tance remaining after 20 days.
A. 12.5 g
B. 25.0 g
C. 50.0 g
D. 100 g
Question 4
A 25 mL sample of a 0.1 M NaOH solution is titrated with 0.1 M HCl. Calculate the pH of the solution after the titration.
A. 7
B. 8
C. 9
D. 10
Question 5
A 0.500 M solution of sodium hydroxide (NaOH) is titrated with 0.250 M hydrochloric acid (HCl) until the equivalence point is reached. Calculate the volume of hydrochloric acid required to reach the equivalence point.
A. 100 mL
B. 200 mL
C. 300 mL
D. 400 mL
Question 6
The half-life of a radioactive subs\tance is 5.0 days. If 100 g of the subs\tance is initially present, calculate the amount of the subs\tance remaining after 20 days.
A. 12.5 g
B. 25.0 g
C. 50.0 g
D. 100 g
Question 7
A 2.5 L flask contains 0.5 mol of CO2 at 298 K. Calculate the partial pressure of CO2.
A. 10 atm
B. 20 atm
C. 30 atm
D. 40 atm
Question 8
A 3.0 M solution of potassium nitrate (KNO3) is mixed with a 2.0 M solution of sodium chloride (NaCl). Calculate the concentration of the resulting solution.
A. 1.5 M
B. 2.0 M
C. 2.5 M
D. 3.0 M
Question 9
A 0.5 M solution of sodium carbonate (Na2CO3) is mixed with a 0.5 M solution of hydrochloric acid (HCl). If the reaction is complete, what is the concentration of the remaining Na2CO3 solution?
A. 0.0 M
B. 0.25 M
C. 0.5 M
D. 0.75 M
Question 10
Determine the molar mass of a polymer sample with the following composition: 85% polyethylene (C2H4)n, 10% polypropylene (C3H6)n, and 5% polystyrene (C6H5CHCH3)n. Given that the molar mass of polyethylene is 14.0 g/mol, the molar mass of polypropylene is 42.1 g/mol, and the molar mass of polystyrene is 104.2 g/mol.
A. 170.0 g/mol
B. 200.0 g/mol
C. 220.0 g/mol
D. 250.0 g/mol
Question 11
Identify the type of chemical reaction represented by the equation: 2NaOH + H2SO4 → Na2SO4 + 2H2O.
A. Synthesis
B. Decomposition
C. Neutralization
D. Combustion
Question 12
The rate cons\tant (k) of a first-order reaction is given by the equation: k = Ae^\( -Ea/RT \). If the activation energy (Ea) is 100 kJ/mol, the gas cons\tant (R) is 8.314 J/mol*K, and the temperature (T) is 300 K, what is the value of the rate cons\tant (k) if the pre-exponential factor (A) is 1.0 x 10^10 s^-1?
A. 1.0 x 10^7 s^-1
B. 1.0 x 10^8 s^-1
C. 1.0 x 10^9 s^-1
D. 1.0 x 10^10 s^-1
Question 13
A metal (M) reacts with oxygen (O2) to form a metal oxide (MO2). If the balanced equation for the reaction is: 4M + 3O2 → 2MO2, what is the mass of 2.0 moles of M?
A. 80 g
B. 120 g
C. 160 g
D. 200 g
Question 14
A 0.1 M solution of NaCl is mixed with 10 mL of 0.1 M AgNO3. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.10 M
C. 0.15 M
D. 0.20 M
Question 15
A 2.5 L sample of a 0.25 M glu\cose solution is diluted to 5 L. What is the new concentration of the solution?
A. 0.0625 M
B. 0.125 M
C. 0.25 M
D. 0.5 M

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