Question

Iodoform can be prepared from all except
(A) Ethyl methyl ketone
(B) Isopropyl alcohol
(C) 3-Methyl-2-butanone
(D) Isobutyl alcohol

Answer 1

Hint: A light yellow, translucent, unstable substance, it has an infiltrating and unmistakable scent (in more seasoned science messages, the smell is some of the time alluded to as that of clinics, where the compound is still ordinarily utilized) and, similar to chloroform, sweetish taste. It is infrequently utilized as a disinfectant.

Complete Step By Step Answer:
Iodoform tests can be given by methyl ketones and alcohols of the sort $ R - CH\left( {OH} \right)C{H_3} $ where $ R $ can be hydrogen too. Thus, isobutyl alcohol $ \left[ {{{\left( {C{H_3}} \right)}_2}CHC{H_2}OH} \right] $ doesn't show the iodoform test. Since the start of the twentieth century, iodoform has been usually utilized as a recuperating and clean dressing or powder for wounds and injuries, anyway such clinical use to this date is restricted. Iodoform is solvent in unsaturated fats and disintegrates delivering iodine in early state ( $ 96.7\% $ of iodine) when in contact with emissions or endodontic contaminations.
So, the answer for the above question is option D.

Additional Information
Iodoform is an organic iodine compound with the recipe $ CH{I_3} $ and a tetrahedral sub-atomic calculation. It is a moderately water-insoluble yellow strong that is artificially receptive in free-extremist responses. Because of its antimicrobial properties following effective organization, negligible degrees of iodoform might be found in disinfectants and it is all the more fundamentally utilized for veterinary purposes. Iodoform has likewise been found in dental glue and root trench filling materials in blend with other intracanal drugs because of its radiopacity.

Note
The compound discovers little scope use as a disinfectant. Around the start of the twentieth century, it was utilized in medication as a mending and germ-free dressing for wounds and injuries, in spite of the fact that this utilization is currently supplanted by prevalent germ-killers. It is the dynamic fixing in numerous ear powders for canines and felines, alongside zinc oxide and propionic corrosive, which are utilized to forestall contamination and encourage expulsion of ear hair.