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

Chemistry 2020 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 Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
6

What is the mass of silver deposited when 24,125 C of electricity is passed through a solution or silver salt.

[Ag = 108, IF = 96,500 C ]

  • A. 432g
  • B. 108g
  • C. 54g
  • D. 27g
View Answer & Discuss WAEC 2020
7

Equal masses of calcium trioxocarbonate(iv) were added to dilute hydrochloric acid at the temperature specified. Under which of the following conditions would the reaction be slowest?

  • A. Calcium trioxocarbonate ( iv ) chips a 20°C
  • B. CalcIum trioxocarbonate (IV) chips at 40°C
  • C. Calcium trioxocarbonate (IV) powder at 20'C
  • D. Calcium trioxocarbonate (IV) powder at 40'C
View Answer & Discuss (1) WAEC 2020
8

The high solubility of ethanol in water is due to?

  • A. its low boiling point.
  • B. its low freezing point.
  • C. its covalent nature
  • D. hydrogen bonding
View Answer & Discuss WAEC 2020
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
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
9

Which of the following pairs of properties of alkali metals decreases down the group?

  • A. First ionization energy and reactivity
  • B. melting point and atomic radius
  • C. Reactivity and electronegativity
  • D. First ionization energy and melting point
View Answer & Discuss (2) WAEC 2020
10

The most suitable process of obtaining water from an aqueous solution of sugar i

  • A. Crystallization
  • B. Distillation
  • C. Filtration
  • D. Decantation
View Answer & Discuss (7) WAEC 2020
Start a Free Practice Test
 
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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 Agent