WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us 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 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
Post UTME Past Questions Agent
2986
The Avogadro number of 24g of magnesium is the same as that of
  • A. 1g of hydrogen molecules
  • B. 16g of oxygen molecules
  • C. 32g of oxygen molecules
  • D. 35.5g of chlorine molecules
View Answer & Discuss (11) JAMB 1990
2987
10cm3 of hydrogen fluoride gas react with 5cm3 of dinitrogen difluoride gas (N2F2) to form 103 of a single gas. Which of the following is the most likely equation of the reaction?
  • A. HF + N2F2 \(\to\) N2HF3
  • B. 2HF + N2F2 \(\to\) 2NHF2
  • C. 2HF + N2F2 \(\to\) N2H2F3
  • D. HF + 2N2F2 \(\to\) N4HF2
View Answer & Discuss (13) JAMB 1986
2988

The number of atoms of chlorine present in 5.85g of NaCl is [Avogadro's Number = 6.02 x 10\(^{23}\)]

  • A. 6.02 x 1022
  • B. 5.85 x 1023
  • C. 6.02 x 1023
  • D. 5.85 x 1024
View Answer & Discuss (2) JAMB 1986
Post UTME Past Questions Agent
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
2989

How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]

  • A. 0.3g
  • B. 1.5g
  • C. 2.4g
  • D. 3.0g
View Answer & Discuss (9) JAMB 1986
2990

The relationship between the velocity (U) of gas molecules and their relative molecular mass (M) is shown by the equation

  • A. U = (kM)\(\frac{1}{2}\)
  • B. U = (kM)2
  • C. U = \(\sqrt{\frac{k}{m}}\)
  • D. U = \(\frac{k}{m}\)
View Answer & Discuss (8) JAMB 1986
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
Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent