(Solved): 7. Which of the following compounds has the shortest bond between its two middle carbons? A) \( \ma ...

7. Which of the following compounds has the shortest bond between its two middle carbons? A) \( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_{2} \) B) \( \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{CH} \equiv \mathrm{CH}_{2} \) C) \( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CH} \) D) \( \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH} \) E) 8. Which of the following is an allylic cation? L. \( \mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2} \) IV. \( \mathrm{CH}_{3} \mathrm{CHCH}_{2} \mathrm{CH}=\mathrm{CH}_{2} \) II. \( \mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{2} \quad \) V. 9 III. \( \mathrm{CH}_{3} \mathrm{CHCH}_{3} \) A) I B) II C) III D) IV E) \( \mathrm{V} \)