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Chemistry 2023 JAMB Past Questions

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31

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

  • A. Calcite
  • B. Bauxite
  • C. Magnetite
  • D. Hematite
View Answer & Discuss (1) JAMB 2023
32

Which group does calcium belong to in the periodic table?

  • A. Alkaline earth metals
  • B. Halogens
  • C. Alkali metals
  • D. Noble gases
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33

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

  • A. Pentane
  • B. Ethanol
  • C. Heptane
  • D. Methane
View Answer & Discuss (8) JAMB 2023
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NECO offline past questions - All questions, answers & explanations in one app 25712
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
34

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

  • A. Volcanic eruptions
  • B. Vehicle emissions
  • C. Forest fires
  • D. Industrial processes
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35

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\(_3\)
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