Question

Which of the following methods cannot produce aldehydes?

• A. Oxidation of primary alcohols
• B. Dehydrogenation of secondary alcohols
• C. Ozonolysis of alkenes
• D. Hydration of ethyne with acid

Hint:

Aldehydes can be formed by the oxidation of primary alcohols, ozonolysis of alkenes, and hydration of alkynes. Secondary alcohols give ketones upon dehydrogenation.

Answer 1

The Correct Option is B

Step 1: Understand the reactions that form aldehydes.
Aldehydes are formed by the oxidation of primary alcohols, ozonolysis of alkenes, and hydration of alkynes.
Dehydrogenation of secondary alcohols, however, forms ketones, not aldehydes.
Step 2: Identify the correct answer.
Dehydrogenation of secondary alcohols forms ketones, not aldehydes.