Question

Iodoform can be prepared from all, except:
A. Propan-2-ol
B. Butan-2-one
C. Propan-1-ol
D. Acetophenone

Answer 1

Hint: We need to know that the Iodoform is the organo iodine compound with the equation $CH{I_3}$ . A light yellow, glasslike, volatile substance, it has an infiltrating and distinctive scent and, comparable to chloroform, sweetish taste. It is incidentally utilized as a disinfectant. It is tetrahedral geometry with ${C_{3v}}$ symmetry.

Complete step by step answer:
We need to remember that the amalgamation of iodoform was first depicted by Georges-Simon Serullas in 1822, by responses of iodine fume with steam over super-hot coals, and further by the response of potassium with ethanoic iodine within the sight of water;[5] and at much a similar time freely by John Thomas Cooper. It is orchestrated in the haloform response by the response of iodine and sodium hydroxide with any of these four sorts of natural mixes: a methyl ketone\[\left( {C{H_3}COR} \right)\], acetaldehyde \[\left( {C{H_3}CHO} \right)\] ethanol \[\left( {C{H_3}C{H_2}OH} \right)\], and certain optional alcohols (\[C{H_3}CHROH\]), where R is an alkyl or aryl group).
The reaction of iodine and base with methyl ketones is solid to such an extent that the iodoform test (the presence of yellow precipitate) is utilized to test the presence of a methyl ketone. This is likewise the situation when testing for explicit optional alcohols containing at any rate one methyl bunch in alpha-position.
We must remember that a few reagents (for example hydrogen iodide) convert iodoform to diiodomethane. Likewise change to carbon dioxide is conceivable: Iodoform responds with fluid silver nitrate to deliver carbon monoxide. At the point when treated with powdered basic silver the iodoform is decreased, creating acetylene. After warming Iodoform decays to create diatomic iodine, hydrogen iodide gas, and carbon.
When propan-1-ol gets oxidized, methyl ketone is not formed.

So, the correct answer is Option C.

Note: We can use Iodoform as a disinfectant. It was also used for medicine as healing. Iodoform could also be used as an active ingredient in several ear powders for cats and dogs, along with phosphoric acid and zinc oxide that is utilized to avoid infection.Iodoform has likewise been found in dental glue and root trench filling materials in mix with other intracanal meds because of its radiopacity. Iodoform is dissolvable in unsaturated fats and breaks down delivering iodine in an early state ($96.7\% $ of iodine) when in contact with emissions or endodontic diseases.