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NEET-XII-Chemistry

Previous Year Paper year:2018

with Solutions -
Qstn# 52 Prvs-QstnNext-Qstn
  • #52
    Carboxylic acid have higher boiling points than
    aldehydes, ketones and even alcohols of
    comparable molecular mass. It is due to their
    (1) formation of intramolecular H-bonding
    (2) formation of carboxylate ion
    (3) more extensive association of carboxylic acid via
    van der Waals force of attraction
    (4) formation of intermolecular H-bonding.
    digAnsr:   4
    Ans : (4)
    Sol. Carboxylic acid has higher boiling point than
    aldehyde, ketone and even alcohols of comparable
    molecular mass.
    This is due to more extensive association through
    intermolecular H-bonding.
    R-C C-R
    O
    O-H O
    H-O