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

Chemistry Past Questions

Clear Selections
Change Subject Post a Question Check Syllabus Study My Bookmarks Past Questions Videos Watch Video Lessons Download App

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
2356
Consider the reaction represented by the equation: Ca(OH)2(aq) + CO 2(g) → CaCO3(s) + H 2O(l)
in the reaction above, CO 2 acts as
  • A. an acidic oxide
  • B. an oxidizing agent
  • C. a basic oxide
  • D. a dehydrating agent
View Answer & Discuss (1) WAEC 2007
2357
Which of the following compounds is a basic salt?
  • A. Mg(NO3)2
  • B. (NH4)2SO4
  • C. K4Fe(CN)6
  • D. Zn(OH)CI
View Answer & Discuss (1) WAEC 2007
2358

What process is illustrated below? S(s) ⇌H2O⇌ S (aq)

  • A. Decomposition of a solid
  • B. Melting of a solid
  • C. Formation of saturated solution of a solid
  • D. Sublimation of a solid
View Answer & Discuss (2) WAEC 2007
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now
Post UTME Past Questions Agent
2359
A solution of a salt X reacts with AgNO3 solution to give white precipitate which dissolves in excess aqueous ammonia. X contains
  • A. CI-
  • B. Pb 2+
  • C. SO 2-
  • D. Zn2+
View Answer & Discuss (1) WAEC 2007
2360
Consider the reaction represented by the following equation: N2(g) + 3H2(g) ⇌ 2NH3(g); ∆H = - 92kJmol1. Finely divided iron is used as catalyst in the reaction in order to
  • A. lower the value of ∆H
  • B. increase the time for attainment of equilibrium
  • C. shorten the time for attainment of equilibrium
  • D. decrease the yield of ammonia
View Answer & Discuss (5) WAEC 2007
Start a Free Practice Test
 
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
Your School's Whatsapp Group - Join Us now