In the preparation of an ester- the commonly used dehydrating agent is -phosphorus pentoxideanhydrous aluminium chlorideanhydrous calcium carbideconcentrated sulphuric acid

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Esterification and Saponification Reaction

In the prepar...

Question

In the preparation of an ester, the commonly used dehydrating agent is _________.

phosphorus pentoxide

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anhydrous calcium carbide

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anhydrous aluminium chloride

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concentrated sulphuric acid

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Solution

The correct option is D concentrated sulphuric acid
Dehydrating agents remove water from a compound. Concentrated sulphuric acid is the common dehydrating agent used for preparing esters. A carboxylic acid reacts with an alcohol in the presence of conc. sulphuric acid to form an ester. This process is known as esterification.

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Similar questions

Q. In the preparation of an ester, the commonly used dehydrating agent is:

(a) Which property of sulphuric acid accounts for its use as a dehydrating agent ?

(b) Concentrated sulphuric acid is both an oxidizing agent and a non-volatile acid. Write on equation each to illustrate the above mentioned properties of sulphuric acid.

(a) Name the process used for the large scale manufacture of sulphuric acid.
(b) Which property of sulphuric acid accounts for its use as a dehydrating agent?
(c) Concentrated sulphuric acid is both an oxidising agent and a non-volatile acid. Write one equation each to illustrate the properties of sulphuric acid mentioned above.

Describe the reactions that show
(i) Concentrated sulphuric acid is a non-volatile acid.
(ii) Concentrated sulphuric acid acts as a dehydrating agent.
(iii) Concentrated sulphuric acid is an oxidising agent.
(iv) Dilute sulphuric acid behaves as dibasic acid.

Q. In the preparation of an ester, the commonly used dehydrating agent is _________.

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