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प्रश्न
What is the action of conc. H2SO4 on carbolic acid at 373 K.
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उत्तर
At 373 K, carbolic acid (phenol) reacts with concentrated sulphuric acid to form p-phenolsulfonic acid.
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संबंधित प्रश्न
Answer in brief.
Give the reagents and conditions necessary to prepare phenol from Benzene sulfonic acid.
Reaction between Grignard reagent and aldehyde other than formaldehyde leads to formation of _______________
Oxidation of ethyl alcohol using K2Cr2O7/dil H2SO4 leads to formation of _______________
Reaction between hot conc. HI and anisole gives ______________
Arrange the following in decreasing order of acid strength.
CH3OH, CH3–CH2–OH, CH3–CH(OH)–CH3, (CH3)3–C–OH
Write IUPAC name of crotonyl alcohol.
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
Name the reagents used to convert phenol into
- picric acid
- p-benzoquinone
An unknown alcohol is treated with Lucas reagent. Explain how you will determine whether the alcohol is primary, secondary or tertiary. Indicate by chemical equation the reaction between isopropyl alcohol and Lucas reagent.
In the Lucas test for alcohols, the appearance of turbidity is due to the formation of ____________.
Which of the following compounds does not react with bromine in alkaline medium?
Which of the following compounds is obtained, when phenol react with bromine water?
In phenols, −OH group is attached to ___________ hybridised carbon.
Phenol is obtained from cumene ____________.
Cumene is used in the commercial method for the manufacture of ____________.
\[\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}\]
Identify A.
In Dow process, chlorobenzene is converted into phenol by ____________.
____________ will NOT undergo acetylation.
Which of the following is INCORRECT regarding phenol?
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 ____________.
Identify the role of PDC from the following.
Which among the following phenolic compound is most acidic in nature?
Identify the compound amongst the following of which 0.1 M aqueous solution has highest boiling point.
Which among the following is not the method of preparation of phenol?
What is the product obtained in Reimer - Tiemann reaction?
Write the product when 1°, 2° and 3° alcohol vapours are passed over hot copper.
Write the chemical reaction when hot copper is treated with Vapours of 2° (secondary) alcohol.
Propene can be converted into propan-1-ol by:
