9. Chlorine, bromine and iodine all react with alkenes such as ethene in an addition reaction. (a) Write the equation for the bromination of ethene, and name the product. (b) Explain why this is called an addition reaction. (c) Describe what you would see if you bubbled ethene through a solution of bromine in an organic solvent such as hexane. 10. If you use a permanganate test to distinguish between cyclohexane and cyclohexene, in which would the purple color of KMNO4 persist? 11. Only one aldehyde and only one primary alcohol gives positive iodoform test. What are their structures? 12. Which of the following compounds would give a positive iodoform test? i Yes/No (c) Yes No (a) (d) (b) Yes/No Yes/No