WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

Chemistry 1979 JAMB 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
26
In which of the following reactions is sulphur dioxide acting as an oxidizing agent?
  • A. SO 2 + 2HNO3 →H2SO4 + NO2 + Heat
  • B. 2SO2 + 2H2O + O2→ 2H2SO4
  • C. SO2 + 2H2O + CI2→ H2SO4 + 2HCI
  • D. SO2 + 2H2S → 3S + 2H2O
  • E. SO2 + H2O → H2SO3
View Answer & Discuss (4) JAMB 1979
27
Calcium hydroxide and ammonium chloride when heated together will give an important product. This compound may be obtained dry by
  • A. dissolving it in water, recrystallizing it and then drying in the oven
  • B. passing it through a concentrated aqueous solution of sodium hydroxide
  • C. passing it through calcium oxide
  • D. passing it through concentrated sulphuric acid
  • E. passing it through anhydrous calcium choride
View Answer & Discuss (9) JAMB 1979
28
Starch can be converted to ethyl alcohol by
  • A. distillation
  • B. fermentation
  • C. isomerization
  • D. cracking
  • E. cooking
View Answer & Discuss (2) JAMB 1979
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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
29
The reaction between hydrogen and iodine may be represented by the equation H2(g)+ I2(g) → 2HI(g), and is exothermic. Therefore
  • A. an increase in temperature favours the forword reaction
  • B. an increase in pressure favours the backward reaction
  • C. both pressure and temperature muct be increased to favour the forward reaction
  • D. a decrease in temperature will favour the forward reaction
  • E. a decrease in pressure and an increase in temperature will favour the forward reaction
View Answer & Discuss (7) JAMB 1979
30

Weighed salts Y and Z were left exposed in the laboratory overnight. In the morning Y had gained weight, and Z had become liquid. What conclusion could be drawn about the nature of the two salts?

  • A. Z is efflorescent
  • B. Y and Z are efflorescent
  • C. Y and Z are deliquescent
  • D. Y and Z are hygroscopic
  • E. Y is deliquescent
View Answer & Discuss (23) JAMB 1979
Start a Free Practice Test
 
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post UTME Past Questions Agent
WAEC and NECO CBT App for Mobile Devices - 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