Your School's Whatsapp Group - Join Us now
Post UTME Past Questions Agent

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

WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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
21

Which of the following compounds would readily undergo addition reaction?

  • A. ethane
  • B. butene
  • C. ethanol
  • D. benzene
View Answer & Discuss (2) WAEC 2025
22

The number of moles of KOH present in 200cm\(^3\) of 5.6 g dm\(^{-3}\) solution is  [KOH = 56 g mol\(^{-1}\)]

  • A. 2.01
  • B. 1.12
  • C. 0.02
  • D. 0.01
View Answer & Discuss (2) WAEC 2025
23

A covalent hydride which does not exist as a gas at room temperature is

  • A. H\(_2\)O
  • B. BH\(_3\)
  • C. HCl
  • D. H\(_2\)S
View Answer & Discuss WAEC 2025
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
Your School's Whatsapp Group - Join Us now
24

In the electrolysis of dilute hydrochloric acid at the anode

  • A. Oxygen gas is given off
  • B. hydrogen gas is given off
  • C. chlorine gas is given off
  • D. hydrogen chloride gas is given off
View Answer & Discuss (4) WAEC 2025
25

In which of the following arrangements are the ions arranged in decreasing order of ionic size?

  • A. F\(^-\),Na\(^+\), Mg\(^{2+}\), Al\(^{3+}\)
  • B. Na\(^+\), Mg\(^{2+}\), Al\(^{3+}\),F\(^-\)
  • C. Al\(^{3+}\), Na\(^+\), Mg\(^{2+}\), F\(^-\)
  • D. Al\(^{3+}\), Mg\(^{2+}\), Na\(^+\), F\(^-\)
View Answer & Discuss (1) 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 Agent
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