Single Choice

Which of the following is not true in case of reaction with heated copper at 3000C?

APhenol → benzyl alcohol
Correct Answer
Bprimary alcohol → alehyde
CSecondary alcohol → ketone
DTeritory alcohol → Olefin

Solution

Oxidation of alcohol with $$Cu$$ at $$300^0C$$ can be used to make distinction between primary, secondary, and tertiary alcohols.
The primary alcohol is dehydrogenated to an aldehyde.
Secondary alcohol is dehydrogenated to a ketone.
Tertiary alcohol is dehydrogenated to an alkene (olefin).

The Phenol $$(C_6H_5−OH)$$ can not be converted to benzyl alcohol with heated copper at $$300^0C$$, because the oxidation of phenol can't give benzyl alcohol $$(C_6H_5−CH_2−OH$$).

Hence, the correct answer is option $$A$$.

SIMILAR QUESTIONS

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What happens when tertiary butyl alcohol is passed over heated copper at $$300^0$$C ?

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Which of the following vapours passed over heated copper to form acetone?

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What happens when tertiary butyl alcohol is passed over heated copper at $$300^oC$$?

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When vapours of secondary alcohol are passed over hot copper at $$300^o$$C, the product formed is?

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When vapours of an alcohol are passed over hot reduced copper, alcohol is converted into alkene, the alcohol is?

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