[ Post UTME Begins ]: View The List Of Schools That Have Released 2026 Post-UTME Forms.
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
  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

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

Consider the following diagram and use it to answer the question below

Open photo

4081

Which of the following cell notations represent the diagram?

  • A. B\(^{2+}\)/B/ /A/A\(^{3+}\)
  • B. A\(^{3+}\) /A/ /B/B\(^{2+}\)
  • C. B/B\(^{2+}\)/ /A/\(^{3+}\)
  • D. A/A\(^{3+}\)/ /B\(^{2+}\)/B
View Answer & Discuss (3) WAEC 2021
4082

Which of the following half reaction equations represent the reaction at the cathode

  • A. A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)
  • B. B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\)
  • C. A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)
  • D. B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)
View Answer & Discuss WAEC 2021
4083

The reactivity of fluorine is high because of 

  • A. its high electronegativity
  • B. the small size of the fluorine atom
  • C. the availability of d-orbitals
  • D. the strong F-F bond
View Answer & Discuss (1) WAEC 2021
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
4084

How many coulombs of electricity would liberate 1.08g of Ag from a solution of silver salt?

[Ag = 108.0; 1F = 96500 C]

  • A. 96500 C
  • B. 9650 C
  • C. 965 C
  • D. 9.65 C
View Answer & Discuss (1) WAEC 2021
4085

The Bohr model of the atom proposed the existence of? 

  • A. the nucleus
  • B. electron shells
  • C. nucleons
  • D. neutrons
View Answer & Discuss WAEC 2021
Start a Free Practice Test
 
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
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now