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प्रश्न
Among the following, which has the highest value of pKb?
विकल्प
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उत्तर
Explanation:
The pKb number is proportional to the basic strength. The electron density on the nitrogen atom drops due to the presence of the electron-withdrawing NO2 group.
As a result, phenylmethanamine is the least basic. Thus, it will have the highest pKb value.
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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
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 decreasing order of basic strength in the gas phase:
C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3
Write the structures of the main products of the following reactions:
Arrange the following in decreasing order of their basic strength:
C6H5NH2, C2H5NH2, (C2H5)2NH2, NH3
Account for the following:
Acylation of aniline is carried out in the presence of pyridine.
By the presence of a halogen atom in the ring, what is the effect of this on basic property of aniline?
Arrange the decreasing order of pKb values.
\[\ce{C6H5NH2, C6H5NHCH3, C6H5CH2NH2, CH3NH2, NH3}\]
