WAEC Chemistry 2020 Objective — Question 2

Question 2 of 50 from the West African Examinations Council (WAEC) Chemistry 2020 Objective paper, with the correct answer and a full explanation.

The IUPAC name of the compound represented by the structure below is

• A. 2-chlorobut-1,3-dieneCorrect
• B. But-1,3-chlorodiene
• C. 2-chlorobut-diene
• D. 3-chlorobut-1,3-diene

Explanation

The parent name is buta-1,3-diene. Since chlorine is attached to carbon-2, the complete IUPAC name is 2-chlorobuta-1,3-diene.

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