1. Tardigrade
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  3. Chemistry
  4. Which one of the following graphs represent the correct order of boiling points (b. p.) of ethane (1), ethyl alcohol (2) and acetic acid (3)?

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Q. Which one of the following graphs represent the correct order of boiling points (b. p.) of ethane (1), ethyl alcohol (2) and acetic acid (3)?

EAMCETEAMCET 2008Chemical Bonding and Molecular Structure

Solution:

In both ethyl alcohol (2) and acetic acid (3) hydrogen bonding is present and the extent of H-bonding is more in acetic acid than ethyl alcohol due to formation of ring. Thus, acetic acid has higher b. p. than ethyl alcohol. Ethane (1) has lowest boiling point due to absence of B.P H-bonding. Hence, the graph showing correct order of boiling points is

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