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Question

Which of the following methods can not be used for the preparation of aldehydes and ketones?

A
Oxidation of alcohols
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B
Dehydrogenation of alcohol
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C
Oxidation by HIO4
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D
Dehydration of alkynes
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Solution

The correct option is D Dehydration of alkynes
Aldehydes and ketones can be prepared from the following methods:
1) Oxidation of alcohols
2) Dehydrogenation of alcohol
3) Oxidation by HIO4
4) Hydration of alkynes
5) Ozonolysis of alkynes

Hence, the correct answer is option (d).

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