Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

Chemistry Past Questions

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

Your School's Whatsapp Group - Join Us now
Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1696
The complex salt formed when aluminium dissolves in sodium hydroxide solution is
  • A. Na3AI(OH)4
  • B. Na2AI(OH)3
  • C. NaAI(OH)3
  • D. Na4AI(OH)4
  • E. NaAI(OH)4
View Answer & Discuss (1) WAEC 1988
1697
The reaction represented by the equation C(s) + H2O(l) → CO(s) + H 2(s) was carried out at 27oC if the enthalpy change was + 4500 J and the entropy change was + 12J, what was the free energy change? (∆G = ∆H - T∆S)
  • A. - 4176 J
  • B. +4176 J
  • C. - 900 J
  • D. + 900 J
  • E. +8100 J
View Answer & Discuss (7) WAEC 1988
1698
During the electrolysis of dilute tetraoxosulphate (VI) acid solution 0.05 mole of electrons were passed what volume of gas was produced at the anode? (Gaseous molar volume = 22. 4dm3 at s.t.p)
  • A. 0.224 dm3
  • B. 0.280 dm3
  • C. 0.560 dm3
  • D. 2.24 dm3
  • E. 22.4 dm3
View Answer & Discuss (10) WAEC 1988
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now
1699

The major raw material in a plastic industry is

  • A. ethanol
  • B. sulphur
  • C. methylethanoate
  • D. ethene
  • E. ethane
View Answer & Discuss (4) WAEC 1989
1700
Which of the following reactions represents the laboratory preparation of hydrogen?
  • A. C(s) + H 2 O(l) → CO(g) + H2(g)
  • B. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
  • C. Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g)
  • D. Cu(s) + H2O(l) → CuO(s) + H2(g)
  • E. 2AI(s) + 3H2O(l) → Al2O3(s) + 3H2(g)
View Answer & Discuss (7) WAEC 1989
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
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent