SELECT * FROM question_mgmt as q WHERE id=1690 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=67 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry Aldehydes Ketones and Carboxylic Acids arrange the following compounds in increasing orde

Question:

Arrange the following compounds in increasing order of their boiling points.

CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3

Answer:

The molecular masses of the given compounds are in the range 44 to 46. CH3CH2OH undergoes extensive intermolecular H-bonding, resulting in the association of molecules. Therefore, it has the highest boiling point. CH3CHO is more polar than CH3OCH3and so CH3CHO has stronger intermolecular dipole - dipole attraction than CH3OCH3┹”¦CH3CH2CH3has only weak van der Waals force. Thus, the arrangement of the given compounds in the increasing order of their boiling points is given by:

CH3CH2CH3< CH3OCH3< CH3CHO < CH3CH2OH


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