JEE organic chemistry in itself is pretty vast but at the IIT JEE level, it deals with General Organic Chemistry i.e. basics organic chemistry. It starts with the concept of Hybridization, IUPAC Nomenclature, Isomerism, Resonance, Hyperconjugation, etc. Stereoisomerism is a critical part that becomes a bottleneck for most students. These concepts are used in almost every reaction mechanism that is part of topics like Hydrocarbons, Halides, Alcohols & Phenols, Aldehydes & Ketones, Carboxylic acids, and derivatives.
For more details: https://www.kaysonseducation.co.in/iitjee-chemistry-Organic-Chemistry-Part-2
Mumbai, Education, JEE Organic Chemistry