1.

Which of the following has the least boiling point ?

Answer»

n-Hexane
n-Pentane
2-Methyl butane
2, 2-Dimethylpropane

Solution :Branching of chain makes the molecule more compact and THEREFORE, decreases the surface area. As a result of decreased surface area, intermolecular attractive FORCES BECOME less and boilling point ALSO decreases.


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