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

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 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
Post UTME Past Questions Agent
3776

If the quantity of oxygen occupying 2.76L container at a pressure of 0.825 atm and 300k is reduced by one-half, what is the pressure exerted by the remaining gas?

  • A. 1.650atm
  • B. 0.825atm
  • C. 0.413atm
  • D. 0.275atm
View Answer & Discuss (50) JAMB 2020
3777

Four elements P, Q, R and S have atomic numbers of 4, 10, 12 and 14 respectively. Which of these elements is noble gas? 

  • A. P
  • B. Q
  • C. R
  • D. S
View Answer & Discuss (6) JAMB 2020
3778

The products of the thermal decomposition of ammonium trioxonitrate(v) are?

  • A. Nitrogen (I) Oxide and Water
  • B. Ammonia and Oxide
  • C. Nitrogen and Water
  • D. Nitrogen (IV) Oxide and Water
View Answer & Discuss (4) JAMB 2020
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 Agent
3779

How many valence electrons are contained in the element \(^{31}_{15}P\)?

  • A. 3
  • B. 4
  • C. 15
  • D. 31
View Answer & Discuss (16) JAMB 2020
3780

The number of molecules of Carbon(iv)Oxide produced when 10.0g of CaCO\(_3\) is treated with 0.2dm\(^3\) of 1 Mole of HCL in the equation

CaCO\(_3\) + 2HCL ⇒  CaCl\(_2\)  + H\(_2\) O + CO\(_2\)  , is?

  • A. 1.00 X 10\(^{23}\)
  • B. 6.02 X 10\(^{23}\)
  • C. 6.02 X 10\(^{22}\)
  • D. 6.02 X 10\(^{24}\)
View Answer & Discuss (15) JAMB 2020
Start a Free Practice Test
 
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
Post UTME Past Questions Agent