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1-Phenol (carbolic acid) is acidic in nature and turns blue litmus red while alcohol (ethanol) does not, 2-phenol gives violet or blue colour with neutral ferric chloride solution while alcohol does not, 3-phenol freezes to a solid in fridge while alcohol does not, 4-phenol produces bubbles on rough iron surface while alcohol does not.
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What are the major differences between alcohol and phenol?
Chemically, the major difference between phenol and alcohol is that phenol is a hydroxyl unit attached to a benzene ring and alcohol has a hydroxyl unit attached to a carbon chain. More generally the major difference is that swallowing a small amount of phenol can kill you. Swallowing a small amount of alcohol (ethanol) may give you a buzz, but you would have to drink a great deal for it to kill you quickly.
Which one give violet color with neutral ferric chloride Salicylaldehyde glycerol benzyl alcohol ethanol?
Salicylaldehyde will give a violet color with neutral ferric chloride.
Does phenol give a positive biuret test?
No, phenol does not give a positive biuret test. The biuret test is used to detect the presence of proteins, not phenol. Phenol is a type of organic compound that does not contain the peptide bonds that the biuret test reacts with.
Why does phenol give a violet colouration with neutral FeCl3?
It is a test for presence of phenol. Fe itself is a transition metal that form a complex ions with phenol. Hence, the Fe can undergo d-d transition that give a colour which is purple in this case.
Why phenol is more acidic than alcohol?
Phenol does not undergo nucleophilic substitution for several reasons: phenol is a relatively stable compound, OH on its own is not one of the best leaving groups, and the aromatic ring does provides an extremely high energy barrier which prevents the initiation of either the SN1 or SN2 substitution mechanisms under normal conditions. When looking at the keto-enol tautomerization resonance forms, the enolate is the major contributor due to the aromatic stabilization. In order to substitute in place of the phenol, the hydroxy group needs to be converted to a better leaving group such as a Toluenesulfonate ester. It is possible to acylate phenols to form other compounds such as aspirin (o-Acetylsalicylic acid). It is alos possible to form aryl ethers with phenols. Benzediols (quinones) can be readily oxidized, allowing even more chemistry to be done to the aromatic system.
Give a simple procedure to convert anisole into phenol?
Anisole can be converted into phenol by using a strong aqueous acid, such as hydrochloric acid, in the presence of water and heat. The acidic conditions will cleave the methoxy group (–OCH3) from the benzene ring, resulting in the formation of phenol. This reaction is known as hydrolysis of an ether.
Why could the IR spectrum of a sample which is contaminated with water lead to an erroneous conclusion that the compound is an alcohol or a phenol?
Water can give a broad peak in the IR spectrum in the same region as the hydroxyl (OH) stretch of alcohols and phenols, leading to confusion. This overlap can result in misinterpretation of the peak as being due to the presence of an alcohol or phenol group when it is actually from water contamination. It is important to ensure the sample is properly dried before analyzing it to avoid this issue.
How to convert aniline to picric acid?
React aniline with HCl/NaNO2 (diazotisation) followed by reaction with KOH to give phenol. Nitration of phenol with fuming nitric acid gives picric acid (or trinitrophenol).
What color is phenol red dropped into distilled water?
Phenol red dropped into distilled water would give a red color. The color of phenol red varies with the pH: it is yellow below pH 6.8, red at pH 7.4, and pink or purple at pH above 8.2.
Why do ibuprofen and naproxen not give a positive test with 1 percent ironIII chloride?
Iron (III) Chloride reacts with the Phenol group. Ibuprofen and Naproxen do not have a phenol group. Acetaminophen, on the other hand, does have a phenol group with would indicate a positive test (purple color change) with in the presence of Iron (III) Chloride.
How does combining elements into a compound affect their properties?
They will either bind on a mollecular scale to form "solutions", or on a non-mollecular scale to form "mechanical mixtures". Certain properties will cause the mixture to combust, give off gasses, or other things, depending on the elements and the ratios.
Why feric chloride give violet colour with phenol?
Ferric chloride reacts with phenol to form a complex that absorbs light in the violet region of the spectrum. The violet color is due to this complex forming between the ferric ions and the phenol molecules, resulting in the absorption of light at specific wavelengths that appear as violet to the human eye.
