JAMB CBT Mobile App 2024 - Free Download
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
  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

JAMB CBT Mobile App 2024 - Free Download
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
3306

Which of the following equations represents a redox reaction?

  • A. \(HNO_{{3}{(aq)}} + NaOH_{(aq)} \to NaNO_{{3}{(aq)}} + H_{2}O_{(l)}\)
  • B. \(AgNO_{{3}{(aq)}}+KCl_{(aq)} \to AgCl_{(s)}+KNO_{{3}{(aq)}}\)
  • C. \(CaCO_{{3}{(s)}} \to CaO_{(s)} + CO_{{2}{(g)}}\)
  • D. \(2H_{2}S_{(s)} + SO_{{2}{(g)}} \to 2HO_{2} + 3S_{(g)}\)
View Answer & Discuss (2) WAEC 2018
3307

The process of extraction of iron from its ore is

  • A. decomposition
  • B. oxidation
  • C. reduction
  • D. sublimation
View Answer & Discuss WAEC 2018
3308

What is the solubility of a salt if 0.4g of it is obtained on evaporating 200\(cm^{3}\) of its saturated solution to dryness?

  • A. 0.08\(gdm^{-3}\)
  • B. 2.00\(gdm^{-3}\)
  • C. 8.00\(gdm^{-3}\)
  • D. 80.00\(gdm^{-3}\)
View Answer & Discuss (1) WAEC 2018
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
JAMB CBT Mobile App 2024 - Free Download
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
3309

An acidic salt has

  • A. double anions in its aqueous solution
  • B. a single cation in its aqueous solution
  • C. hydrogen ions in its aqueous solution
  • D. hydrogen atoms in its aqueous solution
View Answer & Discuss WAEC 2018
3310

A reaction is endothermic if the

  • A. reaction vessel feels cool during the reaction
  • B. enthalpy change is negative
  • C. bond forming energy exceeds bond breaking energy
  • D. heat of formation of reactants exceeds heat of formation of products
View Answer & Discuss WAEC 2018
Start a Free Practice Test
 
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
JAMB CBT Mobile App 2024 - Free Download