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

Chemistry Past Questions

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

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 - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
6

In general, an increase in temperature increases the solubility of a solute in water because?

  • A. more solute molecules collide with each other
  • B. most solutes dissolve with the evoltion of heat
  • C. more solute molecules dissociate at hihger temperatures
  • D. most solutes dissolve with absorption of heat
View Answer & Discuss (8) JAMB 1995
7

A major process involved in the softening of hard water is the?

  • A. conversion of a soluble calcium salt to its trioxoncarbonate (lV)
  • B. decomposition of calcium trioxocarbonate (lV)
  • C. conversion of an insoluble calcium salts to its trioxocarbonate (lV)
  • D. oxidation of calcium atoms to its ions
View Answer & Discuss (4) JAMB 1997
8

12 g of solid protassium chlorate (KCIO) were added to 40 g of water and heated to dissolve all the solid. As the solution cools, crystals of potassium chlorate at 66 oC. The solubility of potassium chlorate at 66 oC is therefore?

  • A. 66
  • B. 33
  • C. 10
  • D. 20
  • E. 30
View Answer & Discuss (17) JAMB 1979
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
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
9

Which of these sources of water may likely contain the least concentration of Ca\(^{2+}\) and Mg\(^{2+}\)?

  • A. Spring water
  • B. River water
  • C. Tap water
  • D. Sea water
View Answer & Discuss (22) JAMB 2018
10

The properties of a good primary standard solution include the following except?

  • A. High molecular mass
  • B. low molecular mass
  • C. high degree of purity
  • D. readily available
View Answer & Discuss (4) WAEC 2019
Start a Free Practice Test
 
Post UTME Past Questions Agent
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