Introduction:
The JEE Advanced exam is a highly competitive exam for admission into prestigious engineering colleges in India. The chemistry section of the JEE Advanced exam covers various topics, including organic chemistry. In this response, we will discuss whether one can expect questions from organic chemistry in the chemistry section of the JEE Advanced exam.

Importance of Organic Chemistry in JEE Advanced:
Organic chemistry is an essential part of the JEE Advanced chemistry section. It is one of the three major branches of chemistry, along with inorganic and physical chemistry. Organic chemistry deals with the structure, properties, composition, reactions, and synthesis of organic compounds, which are primarily composed of carbon atoms. Many important topics in organic chemistry, such as reaction mechanisms, functional groups, and stereochemistry, are frequently tested in the JEE Advanced exam.

Organic Chemistry Topics in JEE Advanced:
The chemistry section of the JEE Advanced exam usually includes a significant number of questions from organic chemistry. Some of the important topics that are commonly tested in the exam include:

1. Reaction Mechanisms: Questions related to reaction mechanisms, such as substitution, elimination, addition, and rearrangement reactions, are frequently asked.

2. Functional Groups: Understanding the properties, reactions, and interconversions of various functional groups, such as alcohols, aldehydes, ketones, carboxylic acids, amines, and ethers, is crucial.

3. Stereochemistry: Concepts like chirality, enantiomers, diastereomers, and optical activity are important in organic chemistry and are often tested in the exam.

4. Organic Reactions: Knowledge of various organic reactions, such as oxidation-reduction, nucleophilic substitution, electrophilic addition, and condensation reactions, is essential.

5. Named Reactions: Understanding the mechanisms and applications of named reactions, such as Grignard reaction, Friedel-Crafts reaction, Aldol reaction, and Claisen condensation, is crucial.

Conclusion:
In conclusion, organic chemistry is an integral part of the chemistry section of the JEE Advanced exam. It is important to have a strong understanding of various topics in organic chemistry, as questions related to reaction mechanisms, functional groups, stereochemistry, organic reactions, and named reactions are frequently asked in the exam. Therefore, it is advisable to thoroughly study and practice organic chemistry to perform well in the JEE Advanced exam.