Q&A

Which ketone will not respond to iodoform test?

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Which ketone will not respond to iodoform test?

In given options, Ethyl isopropyl Ketone doesn’t have Methyl group hence don’t give Iodoform test.

Does ethyl methyl ketone give iodoform test?

(a)- Ethyl methyl ketone. Hint: Draw the structure of the compounds and if the compound has a methyl ketone group or primary alcohol group then it will give the Iodoform test. Methyl ketone group is CH3−CO− and the primary alcohol group is CH3−CH(OH)−.

Does isopropyl alcohol give iodoform test?

Yes, isopropyl alcohol gives a positive iodoform test.

Does ketone give iodoform test?

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Ethanal is the only aldehyde to give the triiodomethane (iodoform) reaction. Lots of ketones give this reaction, but those that do all have a methyl group on one side of the carbon-oxygen double bond. These are known as methyl ketones.

Which does not give iodoform test?

The compound which will not give iodoform test on treatment with alkali and iodine is diethyl ketone.

Which one does not respond to iodoform test?

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. So, the correct answer is “Option A and D”.

Which of the following will not give iodoform test isopropyl?

Isobutanal does not give 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.

Why does isopropyl alcohol give iodoform test?

This test is given by alcohols that are having (CH₃)CH-OH, Because it got oxidised by I₂ and NaOH to (CH₃)C=O. Isopropyl alcohol: (CH₃)₂CH-OH has (CH₃)CH-OH group that is necessary for a alcohol to give positive iodoform test.

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Why does isopropyl give a positive iodoform test?

The formation (with a characteristic antiseptic smell) of a pale-yellow precipitate of iodoform is a good result. A positive iodoform test for isopropyl alcohol (CH3)2CHOH is possible because acetone CH3COCH3-methyl ketone can easily be oxidised.

Why do form test is not given by?

The carbonyl compounds which contains the CH3CO− or the CH3C(H)(OH)−compounds undergo the iodoform reaction. …

Does ethyl alcohol give iodoform test?

Ethanol is the only primary alcohol to give the triiodomethane (iodoform) reaction. If “R” is a hydrocarbon group, then you have a secondary alcohol. Lots of secondary alcohols give this reaction, but those that do all have a methyl group attached to the carbon with the -OH group.

What is the iodoform test for methyl ketone?

The methyl ketone reaction of iodine and base is so reliable that the iodoform test (the appearance of a yellow precipitate) is used to test for methyl ketone presence. This is also the case while searching for alpha-position sensitive secondary alcohols containing at least one methyl group.

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Which compound will give a positive iodoform test?

Compounds That Give Positive Iodoform Test. Acetaldehyde. Methyl Ketones. Ethanol. Secondary Alcohols that contain Methyl Groups in Alpha Position.

What is the chemical reaction of iodine and methyl ketone?

The reaction of iodine, a base and a methyl ketone gives a yellow precipitate along with an “antiseptic” smell. It also tests positive for a few specific secondary alcohols that contain at least one methyl group in the alpha position.

Is it possible to make iodoform from acetophenone?

The short answer is yes. By way of an example, below is shown the iodoform reaction with acetophenone. The reaction is conducted with iodine and potassium hydroxide.