Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

Chemistry WAEC 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
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
406
An exothermic reaction is one which involves
  • A. attainment of dynamic equilibrium
  • B. loss of heat to the surrounding
  • C. evolution of gas as it proceeds
  • D. positive change in value of enthalpy
View Answer & Discuss WAEC 1999
407
Which of the following is an acid salt?
  • A. NH4CI
  • B. MgSO4 7H2O
  • C. CH3COONa
  • D. NaHCO3
View Answer & Discuss (5) WAEC 1999
408
Which of the following compounds dissolves in water to form a solution with pH below 7?
  • A. Sodium tetraoxosulphate (VI)
  • B. Potassium hydroxide
  • C. Ammonium chloride
  • D. Sodium trioxocarbonate (IV)
View Answer & Discuss WAEC 1999
Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
409
If the solubility of KHCO3 is 0.40 mole dm-3 at room temperature , calculate the mass of KHCO3 in 100dm3 of the solution at this temperature. [KHCO3 = 100hmol]
  • A. 4.0g
  • B. 10.0g
  • C. 40.0g
  • D. 100.0g
View Answer & Discuss (7) WAEC 1999
410
The property of calcium chloride which makes it useful as a drying agent is that it is
  • A. ionic
  • B. deliquescent
  • C. a strong electrolyte
  • D. a normal salt
View Answer & Discuss WAEC 1999
Start a Free Practice Test
 
Post UTME Past Questions Agent
Your School's Whatsapp Group - Join Us now
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