JAMB Chemistry 2010 Objective — Question 40
Question 40 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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40. CH3(CH2)3CHC2H5, with C3H7 branch. The IUPAC nomenclature of the compound above is A. 5-propylheptane B. 3-propylheptane C. 4-ethyloctane D. 5-ethyloctane
- A. 5-propylheptane
- B. 3-propylheptane
- C. 4-ethyloctaneCorrect
- D. 5-ethyloctane
Explanation
The longest continuous chain has 8 carbon atoms; the ethyl group ('-CH2CH3') is attached to the fourth carbon atom. Thus, the correct IUPAC name is 4-ethyloctane.
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