a. i. When propanone is warmed with alkaline iodine solution, a yellow precipitate is formed. Name and draw the displayed formula of the yellow precipitate.

ii. Give the structural formulae of the organic products formed in both steps of the reaction in part i.

b. Explain, naming any organic products formed, why ethanol gives a positive test when warmed with alkaline iodine solution.

c. Which of these compounds will give a yellow precipitate when treated with alkaline aqueous iodine?

i. Butanone                  

ii. Butanal                     

iii. Pentan-3-one        

iv. Pentan-2-one

v. Ethanal

vi. Methanal