Which test gives a silver mirror with ethanal but not with acetone?
Tollens' test oxidizes aldehydes like ethanal (CH₃CHO) to carboxylic acids, forming a silver mirror, but does not react with ketones like acetone.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones