Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO offline past questions - All questions, answers & explanations in one app 25712
  1. Home
  2. Classroom
  3. Chemistry

Chemistry Past Questions

Clear Selections
Change Subject Post a Question Check Syllabus Study My Bookmarks Past Questions Videos Watch Video Lessons Download App

Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO offline past questions - All questions, answers & explanations in one app 25712
3381

A hydrocarbon contained 14.3% hydrogen. The empirical formula for the hydrocarbon is   [H= 1.0, C= 12.0]

  • A. \(CH\)
  • B. \(CH_{2}\)
  • C. \(CH_{3}\)
  • D. \(CH_{4}\)
View Answer & Discuss WAEC 2017
3382

Which of the following statements is NOT a chemical property of an acid?

  • A. Evolution of ammonia when heated with ammonium salts
  • B. Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt
  • C. Formation of salt and water with alkalis
  • D. Formation of salt and hydrogen gas with reactive metals
View Answer & Discuss WAEC 2017
3383

Halogens generally react with metals to form

  • A. alkalis
  • B. acids
  • C. bases
  • D. salts
View Answer & Discuss WAEC 2017
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
Join your school's WhatsApp group
3384

Potassium Chloride solid does not conduct electricity because

  • A. it is a covalent compound
  • B. strong cohesive forces make its ions immobile
  • C. strong cohesive force makes its molecule immobile
  • D. each of potassium and chlorine structures contain noble gas structure
View Answer & Discuss WAEC 2017
3385

When water was added to a white anhydrous substance X, the colour changed to blue. X is

  • A. \(CuSO_{4}\)
  • B. \(FeSO_{4}\)
  • C. \(Na_{2}SO_{4}\)
  • D. \(PbSO_{4}\)
View Answer & Discuss WAEC 2017
Start a Free Practice Test
 
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Join your school's WhatsApp group