Jamb Chemistry 2023 Past Questions and Answers

Question 66:

• JAMB 2023

What is the principal ore of iron, from which iron is extracted?

A. Calcite
B. Bauxite
C. Magnetite
D. Hematite

Question 67:

• JAMB 2023

Which group does calcium belong to in the periodic table?

A. Alkaline earth metals
B. Halogens
C. Alkali metals
D. Noble gases

Question 68:

• JAMB 2023

Which of the following is a primary constituent of crude oil?

A. Pentane
B. Ethanol
C. Heptane
D. Methane

Question 69:

• JAMB 2023

What is the main source of carbon monoxide (CO) in urban areas?

A. Volcanic eruptions
B. Vehicle emissions
C. Forest fires
D. Industrial processes

Question 70:

• JAMB 2023

What is the empirical formula of a compound containing 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen by mass?

A. C\(_4\)H\(_8\)O\(_4\)
B. CH\(_2\)O
C. C\(_2\)H\(_4\)O\(_2\)
D. C\(_3\)H\(_6\)O\(_3\)