• AglaSem
  • Schools
  • Admission
  • Career
  • CutOffs
  • News
  • Hindi
  • Mock Test
  • Docs
  • ATSE
aglasem
  • CBSE
    • Date Sheet
    • Question Papers
    • Sample Papers
  • ICSE / ISC
  • State Boards
    • Date Sheet
    • Result
  • NCERT
    • NCERT Books
    • NCERT Solutions
    • NCERT Exempler
    • Teaching Material
  • Mock Tests
  • Study Material
    • Notes
  • Olympiads
    • ATSE
    • KVPY
    • NTSE
    • NMMS
  • School Admission
  • Entrance Exams
    • JEE Main
    • NEET
    • CLAT
  • Students Guide
    • Careers Opportunities
    • Courses & Career
    • Courses after 12th
  • Others
    • HC Verma Solutions
    • Teaching Material
    • Classes Wise Resources
    • Videos
    • Resources
No Result
View All Result
aglasem
  • CBSE
    • Date Sheet
    • Question Papers
    • Sample Papers
  • ICSE / ISC
  • State Boards
    • Date Sheet
    • Result
  • NCERT
    • NCERT Books
    • NCERT Solutions
    • NCERT Exempler
    • Teaching Material
  • Mock Tests
  • Study Material
    • Notes
  • Olympiads
    • ATSE
    • KVPY
    • NTSE
    • NMMS
  • School Admission
  • Entrance Exams
    • JEE Main
    • NEET
    • CLAT
  • Students Guide
    • Careers Opportunities
    • Courses & Career
    • Courses after 12th
  • Others
    • HC Verma Solutions
    • Teaching Material
    • Classes Wise Resources
    • Videos
    • Resources
No Result
View All Result
aglasem
No Result
View All Result

CBSE Class 12 Chemistry Notes: Carboxylic Acids – Physical Properties

by Neepur Garg
April 22, 2019
in 12th Class, Class Notes
Reading Time: 2min read
0
0
SHARES
0
VIEWS
Share on FacebookShare on Twitter

Some important physical properties of carboxylic acids are given below,

1.  Solubility

As the size of the alkyl group increases, the solubility of the acid decreases and polarity is reduced.

2.  Boiling points

Due to intramolecular hydrogen bonding dimerization of acid takes place and boiling point of carboxylic acid is higher than expected.

59

3.  Melting points

The melting points of aliphatic carboxylic acids do not show a regular pattern. The first ten members show a alteration effect, i.e. the melting point of an acid containing even number of carbon atoms is higher than the next lower and next higher homologues containing odd number of carbon atoms.

 Illustration 1.    On the basis of H-bonding explain that the second ionization constant K2 for fumaric acid is greater than for maleic acid.

 Solution:  We know that H-bonding involving acidic H has an acid weakening effect and H-bonding in conjugate base has an acid strengthening effect.

Both dicarboxylic acids have two ionisable hydrogen atoms.  Considering second ionization step.

60

Since the second ionisable H of the Maleate ion participates in H-bonding more energy is needed to remove this H because the H-bond must be broken. The maleate mono anion is, therefore, the weaker acid.

(ii)  Acetic acid in the vapour state shows a relative molecular weight of 120.

« Click Here for Previous Topic Click Here for Next Topic »

Class 12 Chemistry Aldehydes, Ketones and Carboxylic Acids All Topic Notes Class 12 Chemistry All Chapters Notes

To get fastest exam alerts and government job alerts in India, join our Telegram channel.

Tags: CBSE NotesClass 12 NotesClass 12thFree Notes

Neepur Garg

Related Posts

12th Class

Maharashtra Board HSC Time Table 2021 – Check for 12th Commerce, Arts, Science

KVPY 2020
11th Class

KVPY 2020 – Kishore Vaigyanik Protsahan Yojana Tentative Answer Key (Out), Result

10th Class

IARCS Olympiads: Indian Association for Research in Computing Science

12th Class

MP Board Question Paper Class 12th 2020 for Travel and Tourism

Next Post

CBSE Class 12 Chemistry Notes: Carboxylic Acids - Chemical Reactions

Discussion about this post

Registration Open!!

  • CUCET Application 2021 (Phase-1)
  • Manav Rachna University Application 2021
  • DIT University 2021 Application
  • IIAD 2021 Application Form

Class Wise Study Material

  • Class 1
  • Class 2
  • Class 3
  • Class 4
  • Class 5
  • Class 6
  • Class 7
  • Class 8
  • Class 9
  • Class 10
  • Class 11
  • Class 12
  • Disclaimer
  • Terms of Use
  • Privacy Policy
  • Contact

© 2019 aglasem.com

No Result
View All Result
  • CBSE
  • ICSE / ISC
  • State Board
  • NCERT
  • Mock Test
  • Study Material
  • Olympiads
  • Schools Admission
  • Entrance Exams
  • Student Guide
  • HC Verma Solutions
  • Videos

© 2019 aglasem.com

Design Exam Forms Click Here