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Question

The correct order of boiling points of the following amines C4H9NH2,(C2H5)2NH,C2H5N(CH3)2 is :

A
C2H5N(CH3)2>(C2H5)2NH>C4H9NH2
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B
(C2H5)2NH>C2H5N(CH3)2>C4H9NH2
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C
C4H9NH2>(C2H5)2NH>C2H5N(CH3)2
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D
(C2H5)2NH>C4H9NH2>C2H5N(CH3)2
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Solution

The correct option is D C4H9NH2>(C2H5)2NH>C2H5N(CH3)2
Because C4H9NH2 is primary amine and can form hydrogen bonding more than secondary amine (C2H5)2NH and tertiary amine C2H5N(CH3)2 .More hydrogen bonding leads to strong bonding between the molecules, hence increases the boiling point.

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