Question

Chemical test that involves propan-2-ol

Answer 1

Chemical Test

• Iodoform Test.

Iodoform Test of Propan-2-ol

• The compounds which give positive iodoform test are the one with alpha-methyl groups.  

• To be more precise, Ethanal(Acetaldehyde) and methyl ketones.

• Ethanal is the only aldehyde which gives a positive iodoform test.

• Thus, ketone and aldehyde with structure −COCH₃  also show positive results.

• propan-2-ol is CH₃  − CH(OH) − CH₃  so it will have −COCH₃  group and hence gives a positive iodoform test.

Iodoform Test

• It is used to check the presence of carbonyl compounds with the structure R-CO-CH₃ or alcohols with the structure R-CH(OH)-CH₃ in a given unknown substance.

• The reaction of iodine, a base and a methyl ketone gives a yellow precipitate along with an antiseptic smell.