Arrange the following compounds in an increasing order of their

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 Multiple Choice QuestionsShort 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

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396.

How will you convert the following?

Nitrobenzene into aniline
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397.

How will you convert the following?

Ethanoic acid into methanamine

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398.

How will you convert the following?

Aniline into N-phenylethanamide

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399.

Give the structures of A, B and C in the following reactions:

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400.

Arrange the following compounds in an increasing order of their solubility in water: 

C6H5NH2, (C2H5)2NH, C2H5NH2


The solubility order of the given amines is as follows:

 C6H5NH2 < (C2H5)2NH < C2H5NH2  

The more extensive the Hydrogen bonding, the higher is the solubility. C2H5NH2 contains two H-atoms whereas (C2H5)2NH contains only one H-atom. Thus, C2H5NH2undergoes more extensive. Hydrogen bonding than (C2H5)2NH. Hence, the solubility in water of C2H5NH2 is more than that of (C2H5)2NH. 

Further, the solubility of amines decreases with increase in the molecular mass. This is because the molecular mass of amines increases with an increase in the size of the hydrophobic part.

The molecular mass of C6H5NH2 is greater than that of C2H5NH2 and (C2H5)2NH.

 

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