MCQ Solution: Basic Principles of Organic Chemistry
Identify the correct order of boiling points of the following compounds having nearly same molecular weight.
1) I > II > III > IV
2) IV > III > II > I
3) III > IV > II > I
4) IV > II > III > I
SOLUTION
Carboxylic acids have a higher boiling point than alcohol due to a more extensive association of carboxylic acid molecules through intermolecular hydrogen bonding.
Alkane has the least boiling point due to the absence of any polarizing group.
So, the order is IV > III > II > I.
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