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Monday, 15 June 2026
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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1356:
Consider the following reaction equation
H3O+(aq) + OH(aq) \(\rightarrow\) 2H2O(1)
The reaction represents
  • A Esterification
  • B Hydrolysis
  • C Neutralization
  • D Redox
View Answer & Explanation
Question 1357:
The refreshing characteristic taste of fizzy drinks is due ot the presence of
  • A Carbon(IV)oxide
  • B Glucose
  • C Hydrogen
  • D Sodium Citrate
View Answer & Explanation
Question 1358:
Chemical equilibrium is attained when
  • A All the reactants have been completely used up
  • B The reaction goes to completion
  • C The concentration of reactants and products remain constant
  • D The concentration of reactants and products are equal
View Answer & Explanation
Question 1359:
Which of the following factors will affect the rate of the reaction represented by the following equation?
2HCl(aq) + CaCO3(s) \(\rightarrow\) CaCl2(aq) + H2O(1) + CO2(g)
I. Pressure
II.Concentration
III. Nature of reactants
IV. Temperature
  • A I and II only
  • B II, III and IV only
  • C I, II and III only
  • D I, II. III and IV
View Answer & Explanation
Question 1360:
On evaporation to dryness, 3503 of saturated solution of salt Z gave 55.5g of salt. What is the solubility of the salt? [Z = 101]
  • A 1.57 moldm-3
  • B 3.14 moldm-3
  • C 6.28 moldm-3
  • D 12.56 moldm-3
View Answer & Explanation