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Tollens' reagent is used to distinguish aldehydes from ketones by producing a ________ mirror.
- Gold
- Silver
- Copper
- Platinum
Answer: Silver
Tollens' test: Aldehydes reduce [Ag(NH₃)₂]⁺ to metallic silver (silver mirror); ketones don't react. Classic test for carbonyl compounds. [[NCERT Chemistry Class 12]]