Practice Post UTME FUTA chemistry 2017 Past Questions

Question 1

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 2

A 2.5 g sample of a polymer is dissolved in 100 mL of water. What is the molar mass of the polymer?

A. 1000 g/mol

B. 2000 g/mol

Correct C. 5000 g/mol

D. 10000 g/mol

Correct Answer: C

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Question 3

The diagram below shows a titration setup. What is the purpose of the burette?

A. To measure the volume of the acid

Correct B. To measure the volume of the base

C. To mix the acid and base

D. To measure the pH of the solution

Correct Answer: B

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Question 4

A 1.0 M solution of NaOH is titrated with a 1.0 M solution of HCl. What is the pH of the solution after 25 mL of HCl has been added?

A. 1

B. 2

C. 3

Correct D. 4

Correct Answer: D

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Question 5

The diagram below shows a circuit. What is the purpose of the resistor?

A. To reduce the voltage

B. To increase the current

Correct C. To reduce the current

D. To increase the voltage

Correct Answer: C

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Question 6

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. Assume the reaction is: CaO(s) + CO2(g) → CaCO3(s).

A. -1207.6 kJ/mol

B. -1207.6 kJ/mol

C. -1207.6 kJ/mol

Correct D. -1207.6 kJ/mol

Correct Answer: D

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Question 7

A 2.5 g sample of a non-metallic oxide, X2O3, is dissolved in 50 mL of 0.1 M HCl. The resulting solution is then titrated with 0.1 M NaOH. If 25 mL of NaOH is required to reach the equivalence point, what is the molar mass of X?

A. 120 g/mol

B. 120 g/mol

C. 120 g/mol

Correct D. 120 g/mol

Correct Answer: D

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Question 8

A gas at 300 K and 1 atm is compressed to 2 atm. If the initial volume is 2 L, what is the final volume?

A. 1 L

B. 1 L

C. 1 L

Correct D. 1 L

Correct Answer: D

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Question 9

A 10% solution of NaCl is prepared by dissolving 10 g of NaCl in 90 g of water. What is the molarity of the solution?

A. 0.1 M

B. 0.1 M

C. 0.1 M

Correct D. 0.1 M

Correct Answer: D

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Question 10

A 2.5 g sample of a non-metallic oxide, X2O3, is dissolved in 50 mL of 0.1 M HCl. The resulting solution is then titrated with 0.1 M NaOH. If 25 mL of NaOH is required to reach the equivalence point, what is the molar mass of X?

A. 120 g/mol

B. 120 g/mol

C. 120 g/mol

Correct D. 120 g/mol

Correct Answer: D

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Question 11

A polymer is formed by the condensation reaction between two monomers, A and B. If the molecular weight of the polymer is 2000 g/mol and the molecular weights of the monomers are 150 g/mol and 300 g/mol, respectively, what is the average degree of polymerization?

A. 4

Correct B. 6

C. 8

D. 10

Correct Answer: B

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Question 12

The s\tandard enthalpy of formation of CO2 is -393.5 kJ/mol. The s\tandard enthalpy of formation of H2O is -285.8 kJ/mol. What is the s\tandard enthalpy of combustion of methane?

Correct A. -890.3 kJ/mol

B. -850.3 kJ/mol

C. -930.3 kJ/mol

D. -950.3 kJ/mol

Correct Answer: A

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Question 13

A redox reaction involves the oxidation of Fe2+ to Fe3+ and the reduction of MnO4- to Mn2+. What is the oxidation number of Mn in MnO4-?

Correct A. +7

B. +5

C. +3

D. +1

Correct Answer: A

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Question 14

A solution contains 0.1 M NaCl and 0.2 M NaNO3. What is the concentration of Cl- ions in the solution?

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 15

A catalyst is added to a reaction mixture containing 1.0 M H2 and 1.0 M O2. The reaction is allowed to proceed until 50% of the H2 has been consumed. What is the concentration of H2O produced?

Correct A. 0.5 M

B. 1.0 M

C. 1.5 M

D. 2.0 M

Correct Answer: A

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Question 16

A solution contains 0.1 M NaOH and 0.2 M HCl. What is the pH of the solution?

A. 1

B. 2

C. 3

Correct D. 4

Correct Answer: D

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Question 17

A redox reaction involves the oxidation of Fe2+ to Fe3+ and the reduction of MnO4- to Mn2+. What is the oxidation number of Fe in Fe3+?

A. +1

Correct B. +3

C. +5

D. +7

Correct Answer: B

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Question 18

A solution contains 0.1 M NaCl and 0.2 M NaNO3. What is the concentration of Na+ ions in the solution?

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 19

A catalyst is added to a reaction mixture containing 1.0 M H2 and 1.0 M O2. The reaction is allowed to proceed until 50% of the H2 has been consumed. What is the concentration of H2O produced?

Correct A. 0.5 M

B. 1.0 M

C. 1.5 M

D. 2.0 M

Correct Answer: A

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Question 20

The s\tandard enthalpy of formation of CO2(g) is -393.5 kJ/mol. Calculate the s\tandard enthalpy of formation of CaCO3(s) u\sing the following reaction: CaO(s) + CO2(g) → CaCO3(s).

Correct A. -1206.5 kJ/mol

B. -393.5 kJ/mol

C. 393.5 kJ/mol

D. 1206.5 kJ/mol

Correct Answer: A

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Question 21

A 2.5 M solution of NaOH is titrated with 0.5 M HCl. Calculate the pH of the solution after 25 mL of HCl has been added.

A. 2.5

Correct B. 3.5

C. 4.5

D. 5.5

Correct Answer: B

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Question 22

A sample of CO2 gas is collected over water at a temperature of 25°C and a pressure of 1 atm. Calculate the partial pressure of CO2 in the gas mixture.

A. 0.5 atm

B. 0.75 atm

Correct C. 1 atm

D. 1.25 atm

Correct Answer: C

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Question 23

A 10% solution of NaCl is prepared by dissolving 10 g of NaCl in 90 g of water. Calculate the molality of the solution.

Correct A. 0.1 m

B. 0.5 m

C. 1 m

D. 5 m

Correct Answer: A

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Question 24

A 2 M solution of HCl is titrated with 0.5 M NaOH. Calculate the pH of the solution after 20 mL of NaOH has been added.

A. 2.5

Correct B. 3.5

C. 4.5

D. 5.5

Correct Answer: B

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Question 25

A sample of CO2 gas is collected over water at a temperature of 25°C and a pressure of 1 atm. Calculate the volume of the gas at STP.

A. 10 L

B. 20 L

Correct C. 30 L

D. 40 L

Correct Answer: C

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