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Amines

Short Answer Type

71. Account for the fact that ‘before nitration, aniline is converted to acetanilide’.

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72.

Arrange the following in the order of their increasing basicity; p-toluidine, N, N-dimethyl-p-toluidine, p-nitroaniline, aniline.

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73.

Why lower aliphatic amines are soluble in water?

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74.

Give the structure and IUPAC name of the product obtained in the following reaction:
$left parenthesis CH subscript 3 right parenthesis subscript 2 CHCONH subscript 2 space rightwards arrow from NaOH to Br subscript 2 of$

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75.

Arrange the following isomeric compounds in order of decreasing boiling points.
CH₃CH₂N(CH₃)₂ , CH₃CH₂CH₂CH₂NH₂, (CH₃CH₂)₂NH.

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76. Tertiary amines do not undergo acylation. Why?

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77. Sulphanilic acid has high m.p. as well as insoluble inorganic solvent why?

Sulphanilic acid exists as Zwitter ion and thus due to ionic (dipolar nature) it has high m.p. as well as insoluble in inorganic solvent.

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78. (C₂H₅)₄N⁺ is neither an electrophile nor a nucleophile. Why?

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79. The amino group in ethyl amine is basic, whereas that in acetamide, it is not basic. Why?

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80. Aniline undergoes bromination in ortho and para position but in presence of strong acid it gives m-bromo aniline. Explain.

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