Question

Aldehydes are the product of the oxidation of:


organic acid
primary alcohol
secondary alcohol
ketone

Answer 1

ketone -> aldehyde is >C=O -> -CHO which is addition of hydrogen -> reduction

acid -> aldehyde is -COOH -> -CHO which is removal of oxygen -> reduction

secondary alcohol oxidation gives >CH-OH -> >C=O which is a ketone not an aldehyde

primary alcohol oxidation gives -CH\(_{2}\)OH -> -CHO which is aldehyde