Advertisements
Advertisements
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.
Advertisements
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 brief.
Explain why phenol is more acidic than ethyl alcohol.
Write two points of difference between the properties of phenol and ethyl alcohol.
Reaction between Grignard reagent and aldehyde other than formaldehyde leads to formation of _______________
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
How will you bring about the following conversions?
2-methyl propan-2-ol to 2-methylpropene
What is the action of conc. H2SO4 on carbolic acid at 373 K.
Number of oxygen atoms present in salicylaldehyde are ______.
In phenols, −OH group is attached to ___________ hybridised carbon.
Sodium metal with ethyl alcohol gives __________ gas.
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?
Identify 'A' and 'B' in the following series of reactions.

The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
Carbolic acid is oxidised by acidified sodium dichromate to give ______.
____________ will NOT undergo acetylation.
\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]
Identify product 'X' in the above reactions.
The number of moles of hydrogen gas formed when 2 moles of 2-methylpropan-2-ol reacts with aluminium is ____________.
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
Which following reagent is used to obtain alkene from alcohol?
Which among the following is allylic secondary alcohol?
Identify the compound having highest boiling point from the following?
Identify the product X in the following reaction.
\[\ce{Phenol ->[Na2Cr2O7][H2SO4] X}\]
The product C in the following reaction is

The chemical test that distinguish between benzoic acid and phenol is ______.
Arrange the following compounds in an increasing order of their solubility in water:

Write the product when 1°, 2° and 3° alcohol vapours are passed over hot copper.
