Amines

Short Answer Type

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Arrange the following:
In decreasing order of basic strength:
C6H5NH2, C6HsN(CH3)2, (C2H5)2NH and CH3NH2

CH3NH2 > (C2H5)2 NH > C6H5N(CH3)2 > C6H5 NH2
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    Account for the following:
    Diazonium ions of aromatic amines are more stable than those of aliphatic amines.
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    Account for the following:
    pKb of aniline is more than that of methylamine.

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    Account for the following:
    Aniline does not undergo Friedel Craft's reaction.
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    Account for the following:
    Gabriel phthalimide synthesis is preferred for the synthesizing amines.
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    Account for the following:
    Ethylamine is soluble in water, whereas aniline is not.

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    Account for the following:
    Methylamine in water reacts with ferric chloride to precipitate ferric hydroxide.

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    Give one chemical test to distinguish between the following pairs of compounds.
    Aniline and N — methlyaniline.

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    Arrange the following:
    In decreasing order of the pKb values C2H5NH2, C6H5 NHCH3, (C2H5)2NH and C6H5NH2.

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    Account for the following:
    Although amino group is o- and p-directing for aromatic electrophilic substitution reaction, aniline on nitration gives a substantial amount of m-nitro aniline.
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