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2025 WAEC May/June Chemistry Obj/Essay Questions and Answers
Posted by Edu Isle 
on
03 May 2025 3:25 PM
CAT
Are you getting ready for the WAEC 2025 Chemistry exam? This post provides a complete guide to help you succeed, including likely Chemistry questions and answers, exam structure, sample solutions, and study tips. Whether you’re targeting distinction or just aiming to pass confidently, this guide is for you.
WAEC 2025 Chemistry questions and answers
WAEC 2025 Chemistry Exam Format
The Chemistry paper in WAEC is divided into two parts:
Paper 1 (Objective): 50 multiple-choice questions
Paper 2 (Theory/Essay): Structured theory questions, including calculations and explanations
(Practical Paper is separate and not covered in this post)
CLICK HERE TO GET FULL QUESTIONS AND ANSWERS
WAEC 2025 Chemistry Likely Theory Questions and Answers
These questions are based on repeated WAEC patterns and current syllabus expectations.
Question 2
Balance the following chemical equation:
C₂H₆ + O₂ → CO₂ + H₂O
✅ Answer:
Balanced Equation: 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Question 3
Calculate the number of moles in 11g of CO₂ (Molar Mass = 44 g/mol).
✅ Answer:
Moles = Mass / Molar Mass = 1144=0.25 mol\frac{11}{44} = 0.25 \, \text{mol}4411=0.25mol
