[ 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
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
  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 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
1176
Which of the following physical properties decreases across the Periodic Table?
  • A. Ionization potenial
  • B. Electron affinity
  • C. Electronegativity
  • D. Atomic radius
View Answer & Discuss (12) JAMB 1988
1177
What are the possible oxidation numbers of an element if its atomic number is 17?
  • A. -1 and 7
  • B. -1 and 6
  • C. -3 and 5
  • D. -2 and 6
View Answer & Discuss (3) JAMB 1988
1178
The energy changes accompanying the addition of an electron to a gaseous atom is called?
  • A. first ionization energy
  • B. second ionization energy
  • C. electron affinity
  • D. electronegativity
View Answer & Discuss (2) JAMB 1988
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
Post UTME Past Questions Agent
1179

The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?

  • A. nitrogen is less soluble than oxygen
  • B. oxygen is heavier than nitrogen
  • C. nitrogen has a higher partial pressure in air
  • D. gases are hydrated in water
View Answer & Discuss (6) JAMB 1988
1180
An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
  • A. water
  • B. moist SO2
  • C. acidified KMnO4 and water
  • D. water, acidified KMnO4 and oxygen
View Answer & Discuss (10) JAMB 1988
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
Post UTME Past Questions Agent