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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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The product is:

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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?

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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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