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

Chemistry 1990 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 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
Your School's Whatsapp Group - Join Us now
16

The major component of the slag from the production of iron is?

  • A. an alloy of calcium and iron
  • B. coke
  • C. impure iron
  • D. calcium trioxosilicate (IV)
View Answer & Discuss (4) JAMB 1990
17

Sodium hydroxide should be stored in properly closed containers because it?

  • A. readily asborbs water vapour to air
  • B. is easily oxidize by atmospheric oxygen
  • C. turns golden yellow when exposed to light
  • D. melts at a low temperature
View Answer & Discuss (10) JAMB 1990
18
To make coloured glasses, small quantities of oxides of metals which form coloured silicates are often added to the reaction mixture consisting of Na2CO3 and SiO2. Such a metals is a?.
  • A. pottasium
  • B. barium
  • C. zinc
  • D. copper
View Answer & Discuss (8) JAMB 1990
Your School's Whatsapp Group - Join Us 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
19
Which of the following compounds gives a yellow residue when heated and also reacts with aqueous sodium hydroxide to give a white gelatinous precipitate soluble in excess sodium hydroxide solution?
  • A. (NH4)CO3
  • B. ZnCO3
  • C. Al2(SO4)3
  • D. PbCO3
View Answer & Discuss (9) JAMB 1990
20
A cycloalkane with the molecular formula C5H10 has ?
  • A. one isomer
  • B. two isomers
  • C. three isomers
  • D. four isomers
View Answer & Discuss (34) JAMB 1990
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
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
Your School's Whatsapp Group - Join Us now