When ethanol is heated with concentrated sulphuric acid at $170^{\circ} C,$ it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as :
(a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent

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Solution

(c) dehydrating agent
Sulphuric acid acts as a dehydrating agent as it removes water molecules from the alcohol (ethanol), and converts it to ethene.

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

170^{o} C

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Q. When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as:

(a) reducing agent
(b) oxidising agent
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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. 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 :

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.

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When ethanol is heated with concentrated sulphuric acid at 170∘C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as : (a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent

(c) dehydrating agent Sulphuric acid acts as a dehydrating agent as it removes water molecules from the alcohol (ethanol), and converts it to ethene.

When ethanol is heated with concentrated sulphuric acid at $170^{\circ} C,$ it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as :
(a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent

(c) dehydrating agent
Sulphuric acid acts as a dehydrating agent as it removes water molecules from the alcohol (ethanol), and converts it to ethene.