WAEC Chemistry 2015 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Chemistry 2015 Objective paper, with the correct answer and a full explanation.
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Consider the following reaction equation: C₂H₄(g)+3O₂(g)→2CO₂(g)+2H₂O(g). The volume of CO₂(g) produced at s.t.p when 0.05 moles of C₂H₄(g) was burnt in O₂ is [Molar volume of gas = 22.4 dm³]
- A. 1.12dm³
- B. 2.24dm³Correct
- C. 3.72dm³
- D. 4.48dm³
Explanation
0.05 mol C₂H₄ gives 0.1 mol CO₂ (1:2 ratio). Volume = 0.1 × 22.4 = 2.24 dm³.
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