Ethene is formed when ethanol at 443 K is heated with an excess of concentrated sulphuric acid. The role of sulphuric acid in this reaction is :

it acts as an acid

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it acts as a dehydrating agent

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it acts as an oxidising agent

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none of these

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Solution

The correct option is B it acts as a dehydrating agent
The balanced chemical equation for the reaction can be written as:
$C H_{3} C H_{2} O H 443 K - ------ \to c o n c . H_{2} S O_{4} C H_{2} = C H_{2} + H_{2} O$
Therefore, concentrated sulphuric acid removes water from ethanol, thereby, acting as a dehydrating agent .

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Similar questions

Q. When ethanol is heated with excess of concentrated sulphuric acid at

170^{o} C

, it gets converted to ethene. In this reaction, concentrated sulphuric acid acts as:

Q. Question 39
Ethene is formed when ethanol at 443k is heated with an excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation for this reaction.

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.

Conc. sulphuric acid acts as an oxidising agent when it undergoes :

Q. Sulphuric acid acts as dehydrating agent in its reaction with:

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Ethene is formed when ethanol at 443 K is heated with an excess of concentrated sulphuric acid. The role of sulphuric acid in this reaction is :

The correct option is B it acts as a dehydrating agentThe balanced chemical equation for the reaction can be written as:CH3CH2OH443K−−−−−−−→conc.H2SO4CH2=CH2+H2OTherefore, concentrated sulphuric acid removes water from ethanol, thereby, acting as a dehydrating agent .