The correct order of boiling point for primary (1), secondary (2) and tertiary (3) alcohols is:
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  1. 1 > 2 > 3
Explanation:
Alcohols with same molecular weight are expected to have almost same boiling point however two more factors other than molecular weight are important, they are namely H-bonding and surface area of molecule. Both these factors are least in 3 alcohols and maximum in 1 alcohols. Hence, 3 alcohols have least boiling point while 1 alcohols have maximum boiling point.
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