Chemistry - GOC Question with Solution | TestHub
ChemistryGOCAcid BaseMedium2 minQB
ChemistryMediumsingle choice
Glycine (aminoacetic acid) has a much larger dipole moment than propanoic acid, though the two molecules are similar in size. Explain.
Options:
Answer:
D
Solution:
A neutral structure would have only ordinary bond dipoles, comparable to those of propanoic acid. The reason glycine's dipole moment is far larger is its zwitterionic structure : the carboxyl group donates a proton to the amino group, giving a molecule with a full positive and a full negative charge separated by the α carbon. That charge separation accounts for the unexpectedly large dipole moment.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Acid Base
⏱ 2mℹ️ Source: QB
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