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

Chemistry 2025 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
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
36

The electron configuration of element Y is 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^4\). Y, therefore,

  • A. has mass number of 16
  • B. has three unpaired electron
  • C. belongs to period 4
  • D. belongs to group VI
View Answer & Discuss (5) WAEC 2025
37

Which of the following alkanols is tertiary?

  • A. 2-methylpentan-2-ol
  • B. 2-methylpentan-1-ol
  • C. pentan-3-ol
  • D. pentan-2-ol
View Answer & Discuss (3) WAEC 2025
38

Which of the following elements is commercially obtained by the electrolysis of its fused salt?

  • A. Silver
  • B. Copper
  • C. Helium
  • D. Sodium
View Answer & Discuss (1) WAEC 2025
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
39

The lustre of a metal is due to its

  • A. high density
  • B. refractive density
  • C. chemical inertness
  • D. free electrons
View Answer & Discuss (3) WAEC 2025
40

Exothermic reactions take place when energy given out in making bonds is 

  • A. less than energy in for breaking bonds
  • B. more than energy taken in for breaking bonds
  • C. equal to the energy taken in for breaking bonds
  • D. remains the same as the energy taken in
View Answer & Discuss (2) WAEC 2025
Start a Free Practice Test
 
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
Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now