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प्रश्न
Answer in brief.
Give the equations of the reactions for the preparation of phenol from isopropyl benezene.
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उत्तर
Isopropylbenzene: This is the commercial method of preparation of phenol. Isopropylbenzene (Cumene) on air oxidation in presence of Conaphthenate gives cumene hydroperoxide, which on decomposition with dilute acid gives phenol with acetone as a valuable by-product.
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संबंधित प्रश्न
Answer in one sentence/ word.
Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
Write IUPAC name of crotonyl alcohol.
With the help of chemical equations show what happens when cumene hydroperoxide is treated with dil. acid.
Write the reaction involved in the preparation of phenol from benzene sulphonic acid.
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
Write the reactions for the preparation of carbolic acid from aniline.
Write chemical reactions to convert phenol into salicyaldehyde. Write the name of the reaction. What happens when if CCl4 is used instead of CHCl3 in the above reaction.
Which of the following compounds is obtained, when phenol react with bromine water?
Phenol is obtained from cumene ____________.
The CORRECT decreasing order of boiling points for isomeric primary (1°), secondary (2°) and tertiary (3°) alcohols is ____________.
Propane when treated with cold cone. H2SO4 forms a compound which on heating with water gives ______.
Which of following elements does not react with hot concentrated sulphuric acid?
\[\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}\]
Identify A.
Carbolic acid is oxidised by acidified sodium dichromate to give ______.
Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives __________.
Which isomer of C4H10O is optically active?
Which of the following alcohols is least soluble in water?
Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Identify product B in the following conversion?
\[\ce{Phenol ->[NaOH] A ->[CH3I] B}\]
A reaction of phenol with chloroform in presence of sodium hydroxide to form salicylaldehyde is known as ____________.
Ethyl alcohol can be prepared from a Grignard reagent by the reaction of ______.
Which among the following phenolic compound is most acidic in nature?
Name the catalyst used in commercial method of preparation of phenol.
The acid, which contains both -OH and -COOR groups is ______.
Write chemical reaction when hot copper is treated with Vapours of 3° (tertiary) alcohol.
Arrange the following compounds in order of decreasing acidity:
The C−O−C angle in ether is about ______.
Which of the following is primary benzylic alcohol?
Which of the following is trihydric phenol?
