CBSE Class 12 Chemistry 2014 Delhi Set 1 Solved Paper

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Question : 7
Total: 30
Arrange the following compounds in increasing order of solubility in water:
C6H5NH2(C2H5)2NH,C2H5NH2
Solution:  
Increasing order of solubility of C6H5NH2,(C2H5)2 NH and C2H5NH2 are as follows:
C6H5NH2<(C2H5)2NH<C2H5NH2
This is because as the number of H bonded to N increases the H-bonding increases which increases the solubility in water.
C6H5NH2 is least soluble due to presence of hydrophobic benzene ring in the skeleton of structure.
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