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

Chemistry WAEC 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
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
1851

Which of the following statements about an equilibrium system is correct?

  • A. Forward and backward reactions occur at the same rate
  • B. The concentrations of reactants must equal that of the products
  • C. The concentrations of, reactants and products can be changed by adding a catalyst,
  • D. The concentrations of reactants and products are not affected by a change in temperature
View Answer & Discuss WAEC 2022
1852

Consider the following reaction equation
N\(_{2}\)(g) + 3H\(_{2(g)}\)  ⇌ 2NH3(g) ∆H = -92kJ

Increasing the temperature of the reaction would

  • A. shift the equilibrium to the right
  • B. increase the yield of ammonia
  • C. decrease the amount of hydrogen
  • D. decrease the yield of ammonia
View Answer & Discuss (8) WAEC 2022
1853

When air in a syringe is compressed such that there is no change in temperature, the

  • A. air liquefies
  • B. pressure increases
  • C. intermolecular space increases
  • D. density decreases
View Answer & Discuss WAEC 2022
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 Agent
1854

Which of the following statements about liquids is/are true?


I. Liquids maintain their volume at constant temperature.
II. Liquids have fixed shape
III. Liquids do not diffuse
IV. Change in pressure affects volume of liquids

  • A. I only
  • B. IV only
  • C. I and IV only
  • D. II and III only
View Answer & Discuss (1) WAEC 2022
1855

A hydrogen chloride gas reacted with oxygen gas to yield water and chlorine gas. The mole ratio of the hydrogen chloride gas to water is

  • A. 1:3
  • B. 2:1
  • C. 3:1
  • D. 4:1
View Answer & Discuss (3) WAEC 2022
Start a Free Practice Test
 
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
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