Question

vapours of butan-2-ol passed over copper heated to 573 Kelvin give
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Answer 1

Answer:

Butan-2-one

Explanation:

It is in oxidation reaction for alcohols.

1° alcohols convert to aldehydes.

2° alcohols convert to ketones.

3° alcohols do not undergo oxidation but undergo dehydration to give an alkene.

Butan-2-ol is a 2° alcohol that converts to Butan-2-one.

Answer 2

Answer:

Vapors of butan-2-ol passed over copper heated to 573K give butan-2-one.

Explanation:

• When alcohol is heated in presence of copper, dehydration takes place
• One of the hydrogen atoms from the butane breaks and forms a bond with the -OH molecule.
• In the dehydration process, primary alcohol gets converted into an aldehyde, secondary alcohol gets converted into a ketone, and tertiary alcohol gets converted into an alkene.
• Since butan-2-ol is a secondary alcohol, the product obtained will be a ketone.
• The ketone obtained is butan-2-one.

The complete reaction is as follows:

Butan-2-ol + Cu → Butan-2-one + water molecule

Therefore, butan-2-ol is converted to butan-2-one.

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