Waec Model Questions Vol1 2025 Chemistry Question 18

Practice objective / multiple choice question 18 from the 2025 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 18 WAEC_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

A 2.00 g mixture of two hydrocarbons is completely combusted. Hydrocarbon A is an alkane with formula CₙH₂ₙ₊₂ and hydrocarbon B is an alkene with formula CₘH₂ₘ. The combustion produces 5.28 g of CO₂ and 5.04 g of H₂O. Determine the mass percent of the alkane (hydrocarbon A) in the original mixture.

Answer Options

Correct Answer A. 16 %
B. 12 %
C. 20 %
D. 14 %
Correct Answer
A
Correct Option:
16 %

About This Question

This is Waec Model Questions Vol1 2025 Chemistry Question 18. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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