Question

Convert ketone into aldehyde

Answer 1

Ketone contains only O while adding an H to it makes it an aldehyde

Answer 2

Overall:

Attack the carbonyl with an alkyl Grignard reagent to tack on the alkyl group.The acid protonates the alkoxide to finish the first step, and the water that remains deactivates the alkyl Grignard reagent back into an alkane.PCC (pyridinium chlorochromate) oxidizes the hydroxyl group into a carbonyl group via a β-elimination of the explicit proton.