[ Post UTME Begins ]: View The List Of Schools That Have Released 2026 Post-UTME Forms.
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
  1. Home
  2. Classroom
  3. Chemistry

Chemistry 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 - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
431

Dissolving some pellets of NaOH in water would result in

  • A. a decrease in the free energy of the solution
  • B. a decrease in the entropy of the solution
  • C. a lowering of the temperature of te solution
  • D. an increase in the entropy of the solution
View Answer & Discuss (6) JAMB 2007
432
Calculate the number of moles of HCl present in 20cm3 of a 0.75M solution of the acid
  • A. 0.015 mole
  • B. 0.038 mole
  • C. 3.800 moles
  • D. 1.500 moles
View Answer & Discuss (5) JAMB 2007
433
The oxidation state of oxygen in tetraoxosulphate (VI) acid is
  • A. -4
  • B. -2
  • C. +4
  • D. -8
View Answer & Discuss (13) JAMB 2007
Your School's Whatsapp Group - Join Us now
Post UTME Past Questions Agent
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
434

MnO\(_2\)(s) + xHCl(aq) → MnCl\(_2\)(aq) + yH\(_2\)O(l) + zCl\(_2\)(g)
In the equation above, what are the values of x, y and z respectively

  • A. 2, 1, 2
  • B. 4, 1, 2
  • C. 4, 2, 1
  • D. 1, 2, 1
View Answer & Discuss (10) JAMB 2007
435
Calculate the mass of chlorine gas which occupies a volume of 1.12dm3 at s.t.p
[Cl = 35.5, molar volume of gas at s.t.p = 22.4 dm3
  • A. 15.50 g
  • B. 7.10 g
  • C. 3.55 g
  • D. 1.80 g
View Answer & Discuss (8) JAMB 2007
Start a Free Practice Test
 
Post UTME Past Questions Agent
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
Your School's Whatsapp Group - Join Us now