Over 110 Q&A on Reagents in Organic Chemistry (NCERT Class 11 & 12) Part 1: Oxidizing Agents and Reducing Agents Q. No. Reagent Reactant Role/Major Product 1 PCC (Pyridinium Chlorochromate) 1∘ Alcohol (RCH2​OH) Oxidizes to Aldehyde (RCHO), prevents over-oxidation. 2 Acidified KMnO4​ (Hot) Alkene (C=C) Cleavage of C=C to form Carboxylic Acids or Ketones. 3 Acidified KMnO4​ (Hot) Alkyl Benzene (Ar-R) Oxidizes the side chain to Benzoic Acid (Ar-COOH). 4 CrO3​ in Acetic Anhydride Toluene (C6​H5​CH3​) Oxidizes to Benzaldehyde (C6​H5​CHO) (Etard Reaction). 5 Tollen's Reagent (Ag(NH3​)2+​) Aldehyde (RCHO) Oxidizes to Carboxylate salt, depositing a silver mirror. 6 Fehling's Solution (Cu2+ complex) Aldehyde (RCHO) Oxidizes to Carboxylate salt, forming red-brown Cu2​O ppt. 7 Ozone (O3​), then Zn/H2​O Alkene (C=C) Cleaves C=C to form Aldehydes and/or Ketones (Ozonolysis). 8 LiAlH4​ (Lithium Aluminium Hydride) Carboxylic Acid (RCOOH) Strongly reduces to 1∘ Alcohol (RCH2​OH). 9 ...