Question

What happens when ethanol is treated with concentrated sulphuric acid
(a) above 0°C, (b) below 0°C?

Solution

(a)When ethanol is treated with concentrated sulphuric acid at above 0°C paraldehyde is obtained.
(b) When ethanol is treated with concentrated sulphuric acid at below 0°C meta-aldehyde is obtained.

Some More Questions From Aldehydes, Ketones and Carboxylic Acids Chapter

Write the structures of the following compounds.
4-oxopentanal

Write the structures of the following compounds.
Di-sec-butyl ketone

Write the structures of the following compounds.
4-fluoro acetophenone.

Write the structures of the following reactions:

Write the structures of products of the following reactions:

Arrange the following compounds in increasing order of their boiling points:
CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Ethanal, Propanal, Propanone, Butanone.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

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Aldehydes, Ketones And Carboxylic Acids

What happens when ethanol is treated with concentrated sulphuric acid
(a) above 0°C, (b) below 0°C?

Some More Questions From Aldehydes, Ketones and Carboxylic Acids Chapter

Write the structures of the following compounds.
4-oxopentanal

Write the structures of the following compounds.
Di-sec-butyl ketone

Write the structures of the following compounds.
4-fluoro acetophenone.

Write the structures of the following reactions:

Write the structures of products of the following reactions:

Arrange the following compounds in increasing order of their boiling points:
CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Ethanal, Propanal, Propanone, Butanone.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

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NCERT Sample Papers

Entrance Exams Preparation

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Aldehydes, Ketones And Carboxylic Acids

What happens when ethanol is treated with concentrated sulphuric acid(a) above 0°C, (b) below 0°C?

Some More Questions From Aldehydes, Ketones and Carboxylic Acids Chapter

Write the structures of the following compounds.4-oxopentanal

Write the structures of the following compounds.Di-sec-butyl ketone

Write the structures of the following compounds.4-fluoro acetophenone.

Write the structures of the following reactions:

Write the structures of products of the following reactions:

Arrange the following compounds in increasing order of their boiling points:CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions: Ethanal, Propanal, Propanone, Butanone.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions: Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

What happens when ethanol is treated with concentrated sulphuric acid
(a) above 0°C, (b) below 0°C?

Write the structures of the following compounds.
4-oxopentanal

Write the structures of the following compounds.
Di-sec-butyl ketone

Write the structures of the following compounds.
4-fluoro acetophenone.

Arrange the following compounds in increasing order of their boiling points:
CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Ethanal, Propanal, Propanone, Butanone.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.