Question

whose boiling point is higher and why 2 methyl pentane or 2 2 dimethylpropane​

Answer 1

2-Methyl pentane will have a higher boiling point than 2,2-diMethyl propane as the molecular mass of The former is more.

The boiling point depends on the molecular mass of the compound. The boiling point increases with molecular mass.

Also the compound having more branching will have a lower boiling point as the boiling point decreases with increase in branching.