JAMB Chemistry 2019 Objective — Question 3
Question 3 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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Which of the following compounds has the highest percentage of carbon?
- A. C₆H₁₄
- B. C₆H₁₂
- C. C₆H₁₀
- D. C₆H₆Correct
Explanation
Since all contain only carbon and hydrogen with carbon atom number fixed at 6, the one with the smallest number of hydrogen atoms has the greatest percentage of carbon. %C in C₆H₆ = (12×6)/[(12×6)+(1×6)]×100% = 92.3% — the highest among the options.
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