What gives a positive iodoform test?

A positive iodoform test is given by the compounds having CH3CO group in their structure. When Iodine and sodium hydroxide are added to a compound that contains either a methyl ketone or a secondary alcohol with a methyl group in the alpha position, a pale yellow precipitate of iodoform is formed.

Do acids give iodoform test?

Acetic acid contains a −COMe group, so theoretically, it should give a positive result in the iodoform test (i.e. a yellow precipitate of CHI3 being formed). But apparently the iodoform test is used to distinguish between acetic acid and other compounds with a −COMe group.

Does acetic acid give positive iodoform test?

adjacent to carbonyl. Therefore, acetic acid does not give iodoform test. attached to the carbon, Acetophenone gives the iodoform test. group in which electrons are delocalised, hence, it also does not give the iodoform test.

Which type of alcohol will give a positive result with the iodoform test?

Ethanol is the only primary alcohol to give the triiodomethane (iodoform) reaction.

Which of the following compound will not give positive iodoform test?

The only aldehyde that gave the positive iodoform test is acetaldehyde because acetaldehyde only contains the required functional group that is \[{\text{C}}{{\text{H}}_3}{\text{C}} = {\text{O}}\] . Other aldehydes have higher hydrocarbon chains and hence do not give positive iodoform test.

Can carboxylic acid give Haloform test?

-Carboxylic acid and ester do not give haloform test because due to resonance, the carbonyl group is not available.

Which of the following carboxylic acid gives iodoform test?

Ethyl acetoacetate will give iodoform test.

Which carboxylic acid gives Haloform test?

Acetaldehyde is only aldehyde that gives positive haloform test. Ethyl alcohol is the only primary alcohol that gives positive haloform test. When methyl ketones are treated with sodium hydroxide and iodine, yellow precipitate of iodoform is produced which indicates positive haloform test.

Which of the following does not give a positive iodoform test?

Which alcohol does not give iodoform test?

Benzyl alcohol does not have the CH3CO- group or CH3CH2O- so it will not give the positive iodoform test.

Which of the following compounds give a positive Haloform test?

Acetaldehyde is only aldehyde that gives positive haloform test. Ethyl alcohol is the only primary alcohol that gives positive haloform test.