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Amines

Short Answer Type

391.

Name the reagents used in the following reactions ?

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392.

Write the structures of main products when aniline reacts with the following reagents:

(i) Br₂ water

(ii) HCl

(iii) (CH₃CO)₂O/pyridine

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393.

Arrange the following in the increasing order of their boiling point: C₂H₅NH₂, C₂H₅OH, (CH₃)₃N

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394.

Give a simple chemical test to distinguish between the following pair of compounds:

(CH₃)₂NH and (CH₃)₃N.

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395.
Arrange the following compounds in increasing order of solubility in water:

C₆H₅NH₂, (C₂H₅)₂NH, C₂H₅NH₂

The increasing order of solubility in water of the given compounds is as follows:

C₆H₅NH₂ < (C₂H₅)₂NH < C₂H₅NH₂

The more extensive the hydrogen bonding, the higher is the solubility of the compound in water. C₂H₅NH₂ contains two H-atoms, whereas (C₂H₅)₂NH contains only one H-atom. Therefore, C₂H₅NH₂ is more soluble than (C₂H₅)₂NH. The solubility of C₆H₅NH₂is least due to its high molecular mass.