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

Chemistry 2021 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
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent

Consider the following energy profile diagram and use it to answer the question that follows

Open photo

41

The activation energy of the reaction is

  • A. E\(_{A}\)
  • B. E\(_{B}\)
  • C. E\(_{C}\)
  • D. E\(_{D}\)
View Answer & Discuss (4) WAEC 2021
42

The enthalpy change of the reaction is------------

  • A. E\(_{A}\)
  • B. E\(_{B}\)
  • C. E\(_{C}\)
  • D. E\(_{D}\)
View Answer & Discuss (2) WAEC 2021
43

The energy profile diagram illustrates-------------

  • A. an endothermic reaction
  • B. an exothermic reaction
  • C. a spontaneous reaction
  • D. a redox reaction
View Answer & Discuss (1) WAEC 2021
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
44

How many molecules of oxygen would occupy a volume of 2.24 cm\(^{3}\) at s.t.p?

[Molar volume at s.t.p = 22,400 cm\(^{3}\), Avogadro's number = 6.02 x 10\(^{23}\)]

  • A. 3.01 x 10\(^{20}\)
  • B. 3.01 x 10\(^{27}\)
  • C. 6.02 x 10\(^{19}\)
  • D. 6.02 x 10\(^{27}\)
View Answer & Discuss (3) WAEC 2021
45

The isotopes of neon are represented by the symbols \(^{20}\)\(_{x}\) Ne, \(^{21}\) \(_{y}\) Ne, and \(^{22}\) \(_{z}\) Ne. The relationship between x, y, and z is?

  • A. x > y > z
  • B. x < y < z
  • C. x = y= z
  • D. x < z < y
View Answer & Discuss (4) WAEC 2021
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 Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent