Final answer:
LiAlH4 and H2O convert a ketone into an alcohol, specifically a secondary alcohol.
Step-by-step explanation:
When a ketone is treated with LiAlH₄ followed by H₂O, the ketone is converted into an alcohol. Lithium aluminum hydride (LiAlH4) is a strong reducing agent that is capable of reducing ketones to secondary alcohols. Upon the addition of water, the alkoxyaluminum species formed during reduction is hydrolyzed to give the corresponding alcohol product. Hence, LiAlH₄ and H₂O convert a ketone into an alcohol, specifically a secondary alcohol.