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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.
Answer in brief.
Explain why phenol is more acidic than ethyl alcohol.
Give the reagents and conditions necessary to prepare phenol from Chlorobenzene.
Answer in brief.
Give the reagents and conditions necessary to prepare phenol from Benzene sulfonic acid.
Reaction between hot conc. HI and anisole gives ______________
The reagents used to convert phenol to 2,4,6-tribromophenol is _____________
Arrange the following in decreasing order of acid strength.
CH3OH, CH3–CH2–OH, CH3–CH(OH)–CH3, (CH3)3–C–OH
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
Write the reaction involved in the preparation of phenol from benzene sulphonic acid.
What is the action of following on phenol at low temperature?
- dil. HNO3
- conc. H2SO4
- Br2/CS2
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.
Sodium metal with ethyl alcohol gives __________ gas.
Isobutylene on hydroboration followed by oxidation with hydrogen peroxide in presence of base yields ______.
Propane when treated with cold cone. H2SO4 forms a compound which on heating with water gives ______.
+I effect of alkyl groups in alcohols increases the stability of ____________.
____________ will NOT undergo acetylation.
(I)
(II) \[\ce{P + Zn ->[\Delta] Q}\]
(III) \[\ce{P ->[Na2Cr2O7][H2SO4] R}\]
Q and R are respectively:
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
Which of the following conversion explains the acidic nature of alcohols?
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Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Which of the following on oxidation yields ethyl methyl ketone?
Identify the alcohol that reacts immediately with Lucas reagent?
Identify the product X in the following reaction.
\[\ce{Phenol ->[Na2Cr2O7][H2SO4] X}\]
Which of the following compounds reacts immediately with Lucas reagent?
The chemical test that distinguish between benzoic acid and phenol is ______.
What is the commercial method of preparation of phenol?
Which of the following is primary benzylic alcohol?
