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प्रश्न
Write a short note on the following:
Carbylamine reaction
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उत्तर
Aliphatic and aromatic primary amines on heating with chloroform and ethanolic potassium hydroxide form isocyanides or carbylamines which are foul smelling substances. Secondary and tertiary amines do not show this reaction. This reaction is known as carbylamine reaction or isocyanide test and is used as a test for primary amines.
\[\ce{R-NH2 + CHCl3 + 3KOH ->[Heat] R-NC + 3KCl + 3H2O}\]
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संबंधित प्रश्न
Arrange the following:
Aniline, p-nitroaniline, p-methylaniline - in the increasing order of their basic strength
Write the structures of main products when aniline reacts with the following reagents : HCl
Write the chemical equations involved when aniline is treated with the following reagents: HCI
Arrange the following:
In decreasing order of the pKb values:
C2H5NH2, C6H5NHCH3, (C2H5)2NH and C6H5NH2
Arrange the following:
In increasing order of basic strength:
C6H5NH2, C6H5N(CH3)2, (C2H5)2NH and CH3NH2
Arrange the following:
In increasing order of basic strength:
Aniline, p-nitroaniline and p-toluidine
Write the structures of the main products of the following reactions:
The following reaction takes place in the presence of:
The correct increasing order of basic strength for the following compounds is ______.
(I)
(II)
(III)
The correct decreasing order of basic strength of the following species is ______.
\[\ce{H2O, NH3, OH-, NH^{-}2}\]
Account for the following:
Acylation of aniline is carried out in the presence of pyridine.
When ethanol is mixed with ammonia and passed over alumina the compound formed is which compound?
What is the characteristic smell of liquid amines?
What is the correct decreasing order of the basic character of the three amines and ammonia?
Account for the following:
Arrange the following compounds in the increasing order of their basic strength in aqueous solution: CH3NH2,(CH3)3N,(CH3)2NH
The correct order of the increasing basic nature of Ammonia, Methylamine and Aniline is:
