Identify the correct order of boiling points of the following compounds having nearly same molecular weight.

I > II > III > IV

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IV > III > II > I

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III > IV > II > I

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IV > II > III > I

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Solution

The correct option is D IV > III > II > I
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.

Option B is correct.

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