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प्रश्न
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.
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उत्तर
Ethyl alcohol gives hydrogen on reaction with sodium metal. On oxidation with PCC ethanol will form acetaldehyde (C2H4O).
\[\ce{\underset{\text{Ethyl alcohol}}{2CH3 - CH2 - OH} ->[2Na] \underset{\text{Sodium ethoxide}}{2CH3 - CH2 - O- Na+} + {H_{2(g)}} ^}\]
\[\ce{\underset{\text{Ethyl alcohol}}{CH3 - CH2 - OH} ->[{[O]}][PCC] \underset{\ce{Acetaldehyde(C2H4O)}}{CH3 - CHO} + H2O}\]
संबंधित प्रश्न
Answer in one sentence/ word.
Hydroboration-oxidation of propene gives _________.
Answer in one sentence/ word.
Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.
Give the reagents and conditions necessary to prepare phenol from Chlorobenzene.
Answer in brief.
Explain why p-nitrophenol is a stronger acid than phenol.
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.
Write the reaction involved in the preparation of phenol from benzene sulphonic acid.
Write Kolbe’s reaction.
Write chemical equation of acetyl chloride with phenol
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
Phenol is obtained from cumene ____________.
The CORRECT decreasing order of boiling points for isomeric primary (1°), secondary (2°) and tertiary (3°) alcohols is ____________.
Carbolic acid is oxidised by acidified sodium dichromate to give ______.
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What is INCORRECT about the product written in the below given reaction?
\[\ce{R - CH2 - OH ->[PCC] R - COOH}\]
(I)
(II) \[\ce{P + Zn ->[\Delta] Q}\]
(III) \[\ce{P ->[Na2Cr2O7][H2SO4] R}\]
Q and R are respectively:
The number of σ bonds in carbolic acid is ______.
Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Ethyl alcohol can be prepared from a Grignard reagent by the reaction of ______.
The compound which reacts fastest with Lucas reagent at room temperature is ______.
Which of the following compounds reacts immediately with Lucas reagent?
The chemical test that distinguish between benzoic acid and phenol is ______.
Arrange O - H, C - H and N - H bonds in increasing order of their bond polarity.
Arrange the following compounds in an increasing order of their solubility in water:
Explain the reaction of 1° and 2° alcohol with oxidising agent chromic anhydride (CrO3).
Write the product when 1°, 2° and 3° alcohol vapours are passed over hot copper.
Convert the following :
cumene to phenol.
What is the commercial method of preparation of phenol?
