POST UTME FUTO 2018 Chemistry | Objective

Are you preparing for POST UTME FUTO exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A 0.1 M solution of NaCl is prepared by dissolving 2.5 g of NaCl in 100 mL of water. What is the concentration of the solution in mol/L?
A. 0.04 M
B. 0.08 M
Correct C. 0.1 M
D. 0.2 M

Correct Answer: C

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Question 2
A solution contains 5.0 g of glu\cose (C6H12O6) per 100 mL of solution. What is the molarity of the solution?
A. 0.027 M
B. 0.054 M
Correct C. 0.1 M
D. 0.2 M

Correct Answer: C

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Question 3
A 2.0 M solution of HCl is prepared by dissolving 40 g of HCl in 100 mL of water. What is the concentration of the solution in mol/L?
A. 0.1 M
B. 0.2 M
Correct C. 0.4 M
D. 0.8 M

Correct Answer: C

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Question 4
A solution contains 10.0 g of NaOH per 100 mL of solution. What is the molarity of the solution?
A. 0.25 M
B. 0.5 M
C. 0.75 M
Correct D. 1.0 M

Correct Answer: D

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Question 5
A 1.0 M solution of glu\cose (C6H12O6) is prepared by dissolving 18.016 g of glu\cose in 100 mL of water. What is the concentration of the solution in mol/L?
A. 0.1 M
B. 0.2 M
Correct C. 0.3 M
D. 0.4 M

Correct Answer: C

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Question 6
A 2.5 g sample of a subs\tance is dissolved in 50 mL of water. If the molar mass of the subs\tance is 180 g/mol, what is the concentration of the solution in molarity?
A. 0.028 M
Correct B. 0.056 M
C. 0.084 M
D. 0.112 M

Correct Answer: B

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Question 7
A reaction is represented by the equation: 2A + B → 2C + D. If 1.5 moles of A and 0.75 moles of B are present, what is the limiting reac\tant?
A. A
Correct B. B
C. C
D. D

Correct Answer: B

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Question 8
A gas at 27°C and 1 atm is compressed to 2 atm. What is the new temperature in Kelvin?
A. 300 K
B. 320 K
Correct C. 340 K
D. 360 K

Correct Answer: C

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Question 9
A 10 mL sample of a solution containing 0.5 M NaOH is mixed with 20 mL of a solution containing 0.2 M HCl. What is the pH of the resulting solution?
A. 1
B. 2
Correct C. 3
D. 4

Correct Answer: C

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Question 10
A diagram of a titration setup is shown below.
Correct A. The burette contains the acid.
B. The beaker contains the acid.
C. The test tube contains the acid.
D. The burette contains the base.

Correct Answer: A

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Question 11
The atomic radius of an element in the periodic table increases down a group due to the addition of new energy levels. However, the atomic radius of an element in the periodic table decreases across a period due to the increase in effective nuclear charge. Which of the following elements has the largest atomic radius?
A. Rb
B. Cs
C. Fr
Correct D. Ba

Correct Answer: D

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Question 12
A 2.5 M solution of HCl is titrated with 0.5 M NaOH. If 25 mL of NaOH is required to reach the equivalence point, what is the volume of HCl in liters?
A. 0.125 L
Correct B. 0.25 L
C. 0.5 L
D. 1 L

Correct Answer: B

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Question 13
A sample of CO2 gas at 25°C and 1 atm is collected over water. If the vapor pressure of water at 25°C is 23.8 mmHg, what is the partial pressure of CO2?
A. 760 mmHg
Correct B. 736.2 mmHg
C. 760 - 23.8 mmHg
D. 760 mmHg - 23.8 mmHg

Correct Answer: B

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Question 14
A 1.0 M solution of NaOH is titrated with 0.5 M HCl. If 20 mL of HCl is required to reach the equivalence point, what is the number of moles of NaOH?
A. 0.05 mol
Correct B. 0.1 mol
C. 0.2 mol
D. 0.5 mol

Correct Answer: B

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Question 15
A 2.0 M solution of H2SO4 is titrated with 0.5 M NaOH. If 30 mL of NaOH is required to reach the equivalence point, what is the number of moles of H2SO4?
A. 0.1 mol
B. 0.2 mol
Correct C. 0.3 mol
D. 0.4 mol

Correct Answer: C

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Question 16
Determine the s\tandard enthalpy of formation of CaCO3(s) from the following data: ΔHf(CaO(s)) = -635.09 kJ/mol, ΔHf(CO2(g)) = -393.51 kJ/mol, ΔHf(C) = 0 kJ/mol.
Correct A. -1206.60 kJ/mol
B. -1206.61 kJ/mol
C. -1206.59 kJ/mol
D. -1206.62 kJ/mol

Correct Answer: A

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Question 17
A 2.50 L flask contains 0.250 mol of an ideal gas at 27°C. Calculate the pressure of the gas.
Correct A. 1.01 x 10^5 Pa
B. 1.01 x 10^4 Pa
C. 1.01 x 10^3 Pa
D. 1.01 x 10^2 Pa

Correct Answer: A

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Question 18
A solution contains 0.0500 M NaCl. What is the concentration of Cl- ions?
A. 0.0500 M
Correct B. 0.100 M
C. 0.0500 M
D. 0.0500 M

Correct Answer: B

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Question 19
A 50.0 mL sample of a solution contains 0.250 g of KNO3. What is the molarity of the solution?
Correct A. 0.500 M
B. 0.250 M
C. 1.00 M
D. 0.100 M

Correct Answer: A

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Question 20
A 2.00 L flask contains 0.500 mol of an ideal gas at 27°C. Calculate the number of moles of gas that must be added to the flask to increase the pressure to 1.00 x 10^5 Pa.
A. 0.250 mol
B. 0.500 mol
C. 1.00 mol
Correct D. 0.750 mol

Correct Answer: D

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Question 21
Determine the pH of a 0.1 M solution of HCl.
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 22
A 25 mL sample of 0.5 M H2SO4 is titrated with 0.5 M NaOH. What is the pH of the solution after 10 mL of NaOH has been added?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 23
A metal (X) reacts with dilute HCl to produce a gas (Y). The gas (Y) is collected over water and its density is found to be 1.7 g/L at 20°C. What is the identity of the gas (Y)?
Correct A. CO2
B. H2
C. N2
D. O2

Correct Answer: A

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Question 24
A sample of a metal (X) is heated in a stream of oxygen to produce a green-colored solid (Y). The solid (Y) is found to be soluble in water. What is the identity of the solid (Y)?
A. CuO
B. Fe2O3
Correct C. MnO2
D. Cr2O3

Correct Answer: C

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Question 25
A 2.0 g sample of a non-metal (X) is heated in a stream of oxygen to produce a gas (Y). The gas (Y) is collected over water and its density is found to be 1.2 g/L at 20°C. What is the identity of the gas (Y)?
A. CO2
B. H2O
Correct C. SO2
D. Cl2

Correct Answer: C

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