Compound used in the experiment 2-pentanone 3-pentanone benzaldehyde 1-hexanol 4

Question

Compound used in the experiment

2-pentanone

3-pentanone

benzaldehyde

1-hexanol

4-methyl-2-pentanol

2-methyl-2-pentanol

3,5-dimethylphenol

p-anisic acid

m-anisidine

N-methylanilin

and N,N-diethylaniline

Q1. A student receives an unknown for the tests for unsaturation. Upon conducting the bromine in methylene chloride test, a white fog evolves. Why does this form? Of the test compounds, what could be the possible identity of the unknown?

Q2. Of cyclohexene and toluene, which molecule would favor the formation of a brown precipitate in the Baeyer test? What is the chemical formula of this brown precipitate?

Q3. What information can be obtained about the identity of this alcohol? Use the following: A battery of three classification tests was conducted with an unknown alcohol. The following results were obtained:

- a blue-green color evolved in two seconds after addition of chromic acid to an unknown alcohol in acetone.

- a cloudiness appeared within four minutes of addition of unknown to Lucas reagent

- a pale yellow precipitate formed in the iodoform test.

Explanation / Answer

Q1.the white fog due to the disappearance of the deep brown coloration of bromine when the bromine has been used up by reaction with the unknown sample.i.e due to formation of brominated phenol.
identity of unknown : 3,5-dimethylphenol

Q2. cyclohexene.
chemical formula: (HOOC)-(CH2)4-(COOH)

Q3.

1)1-hexanol
2)2-methyl-2-pentanol
3)4-methyl-2-pentanol

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