Single Choice

Acids have much higher boiling points than isomeric esters because :

AAcids form dimers by H-Bonding
Correct Answer
BAcids are volatile in steam
CEster are non-volatile
DAcids can ionise to give protons in aqueous solution

Solution

Ester molecules are polar but have no hydrogen atom attached directly to an oxygen atom. They are therefore incapable of engaging in inter-molecular hydrogen bonding with one another and thus have considerably lower boiling points than their isomeric carboxylic acid counterparts.

SIMILAR QUESTIONS

Physical World

Which of the following compounds has the highest boiling point?

Physical World

Decreasing order of boiling point of $$I$$ to $$IV$$ follow $$\underset{I}{\text{Methylformate}}$$ $$\underset{II}{\text{Ethylformate}}$$ $$\underset{III}{\text{Iso-propylformate}}$$ $$\underset{IV}{\text{n-Propylformtae}}$$

Physical World

Which of the following has the highest boiling point?

Physical World

An aqueous solution of formic acid cannot be fractionated to get anhydrous acid because:

Physical World

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their _________.

Physical World

Identify the correct order of boiling points of the given compounds $$(A)$$ $${CH}_{3}{CH}_{2}{CH}_{2}{CH}_{2}OH$$ $$(B)$$ $${CH}_{3}{CH}_{2}{CH}_{2}CHO$$ $$(C)$$ $${CH}_{3}{CH}_{2}COOH$$

Physical World

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Physical World

Answer the following questions Give reasons for the following: Carboxylic acids are higher boiling liquids than alcohols.

Physical World

Arrange the following in the increasing order of their boiling pints: $$CH_3-CH_2-CH_2-COOH, CH_3-CH_2-O-CH_2-CH_3, CH_3CH_2CH_2CH_2OH$$

Physical World

The boiling points of acetic anhydride (I), propionic anhydride (II) and butyric anhydride (III) follow the order.

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