WAEC, JAMB & NECO Chemistry Questions on Introduction to Chemistry

Are you looking for objective questions based on specific topics, you are in the right place. We have carefully created several examination-standard questions to help students prepare effectively.

The objective questions below are based strictly on the Introduction to Chemistry, with emphasis on the meaning of chemistry and related concepts. They are structured in the same format commonly used in WAEC, JAMB, and NECO.

Go through the questions carefully, practice them, and test your understanding. The correct answers are provided below to aid revision and self-assessment.

Chemistry Objective Questions (WAEC / JAMB / NECO)

1. Chemistry is best defined as the study ofA. living organismsB. matter and energyC. composition, properties and uses of matterD. forces and motion
2. The major focus of chemistry is onA. nuclear reactionsB. physical changesC. chemical reactionsD. biological processes
3. Which of the following is NOT a branch of chemistry?A. Organic chemistryB. Inorganic chemistryC. Physical chemistryD. Agricultural chemistry
4. The branch of chemistry that studies the effect of chemicals on living cells isA. Environmental chemistryB. Industrial chemistryC. BiochemistryD. Medicinal chemistry
5. Medicinal chemistry deals mainly withA. fuels and alloysB. drugs and physiologically active compoundsC. pollutants in airD. food preservation
6. Which of the following is a chemical change?A. Melting of iceB. Rusting of ironC. Boiling of waterD. Dissolving sugar in water
7. The production of palm wine is an example ofA. physical changeB. nuclear reactionC. chemical changeD. mechanical process
8. Lighting a match stick is an example ofA. evaporationB. condensationC. chemical reactionD. freezing
9. Which of the following is NOT a chemical reaction?A. Soap makingB. Cooking foodC. Hair cream productionD. Melting candle wax
10. Plastics are produced mainly throughA. biological processesB. mechanical processesC. chemical processesD. physical changes
11. A reasonable explanation put forward before an experiment is calledA. theoryB. lawC. inferenceD. hypothesis
12. Which of the following is used to test a hypothesis?A. ObservationB. ExperimentC. LawD. Conclusion
13. A theory becomes a law when it isA. guessedB. disprovedC. extensively tested and provenD. observed once
14. The first step in the scientific method isA. experimentB. hypothesisC. observationD. conclusion
15. Chemistry has helped to increase food production mainly throughA. man-made fibresB. fertilizers and preservativesC. cement productionD. space technology
16. Man-made fibres are mainly used inA. housingB. medicineC. clothingD. transportation
17. The production of cement and steel shows the importance of chemistry inA. agricultureB. housingC. space scienceD. medicine
18. The use of explosives and gunpowder is related toA. medicineB. agricultureC. militaryD. education
19. Rusting of iron occurs in the presence ofA. nitrogen and heatB. oxygen and waterC. hydrogen and airD. carbon dioxide only
20. Rusting of iron is described as aA. fast oxidation processB. slow reduction processC. physical changeD. nuclear reaction
21. The brown substance formed on rusted iron isA. iron(II) sulphideB. iron(III) oxideC. iron nitrateD. iron carbonate
22. Which of the following is NOT a method of preventing rust?A. GalvanizingB. OilingC. GreasingD. Burning
23. Coating iron with zinc to prevent rusting is calledA. alloyingB. paintingC. galvanizingD. cathodic protection
24. Pollution is mainly caused byA. rainfallB. chemical wastes and effluentsC. soil erosionD. wind
25. Which of the following gases is a major air pollutant?A. OxygenB. NitrogenC. Carbon(II) oxideD. Helium
26. Acid rain is mainly caused byA. oxygenB. sulphur(IV) oxideC. nitrogenD. hydrogen
27. Drug abuse is best controlled throughA. punishmentB. imprisonmentC. educationD. isolation
28. Which of the following drugs is commonly abused?A. AspirinB. ParacetamolC. CocaineD. Vitamin C
29. Chemistry is called the central science because it lies betweenA. physics and geographyB. biology and physicsC. medicine and agricultureD. chemistry and mathematics
30. Which of the following careers requires chemistry knowledge?A. PharmacistB. DriverC. ActorD. Tailor
31. A scientist who controls pollution is known asA. production managerB. safety officerC. pollution controllerD. personnel manager
32. The study of drugs like aspirin belongs toA. biochemistryB. medicinal chemistryC. industrial chemistryD. environmental chemistry
33. Chemical waste from factories mainly causesA. food preservationB. environmental pollutionC. textile productionD. housing development
34. The production of fuels and alloys relates chemistry toA. clothingB. transportationC. medicineD. space science
35. Which of the following is an adverse effect of chemistry?A. Food preservationB. Drug productionC. CorrosionD. Textile manufacture
36. Which method prevents rust by using a more reactive metal?A. PaintingB. OilingC. Sacrificial protectionD. Greasing
37. Soap and detergents are products ofA. physical processesB. chemical reactionsC. biological processesD. mechanical changes
38. We study chemistry mainly to acquire knowledge aboutA. theoriesB. hypothesisC. matterD. bioscience
39. Which of the following is NOT a chemical change?A. RustingB. CookingC. BurningD. Melting of candle wax
40. Which of the following helps to increase food production?A. Mobile phoneB. FertilizerC. Space rocketD. Man-made fibres
41. Which of the following is an example of chemistry in everyday life?A. WritingB. Drug makingC. ReadingD. Singing
42. The application of chemistry in industries is known asA. organic chemistryB. industrial chemistryC. biochemistryD. physical chemistry
43. Which of the following careers applies chemistry to crime investigation?A. GeologistB. Forensic scientistC. BrewerD. Horticulturist
44. Rusting of iron affects water quality mainly throughA. evaporationB. mineral contaminationC. condensationD. freezing
45. The most important contribution of chemistry to medicine isA. space travelB. cement productionC. drug productionD. textile manufacture

Chemistry Objective Answers

1. C
2. C
3. D
4. C
5. B
6. B
7. C
8. C
9. D
10. C
11. D
12. B
13. C
14. C
15. B
16. C
17. B
18. C
19. B
20. B
21. B
22. D
23. C
24. B
25. C
26. B
27. C
28. C
29. B
30. A
31. C
32. B
33. B
34. B
35. C
36. B
37. C

38. B
39. B
40. C
41. D
42. B
43. B
44. B
45. B