Question

Which of the following is true regarding preparation of aldehydes and ketones ?
(i) Both can be prepared by the oxidation of the concerned alcohol with copper at about ${250}^{\circ }C$
(ii) Both can be prepared by the oxidation of the concerned alcohol by oppenauer oxidation.
(iii) Both can be prepared by the oxidation of respective alcohol with acidic dichromate.

• A. (i)
• B. (ii) and (iii)
• C. (i) and (iii)
• D. All the three

Answer 1

The correct option is A

(i)

Primary alcohols on oxidation give carboxylic acids as the final product, of course through aldehydes. Oppenauer oxidation involves oxidation of $2^{\circ }$ alcohols to ketones, and not for the oxidation of $1^{\circ }$ alcohols.