In 12th grade, the study of chemistry typically covers three main branches, which are:
1. **Physical Chemistry**: This branch deals with the physical properties and changes of matter and the energy changes associated with these processes. Topics often include thermodynamics, kinetics, quantum chemistry, and the study of solutions.
2. **Organic Chemistry**: Organic chemistry focuses on the structure, properties, and reactions of carbon-containing compounds. It includes topics such as hydrocarbons, functional groups, reaction mechanisms, and synthesis of organic compounds.
3. **Inorganic Chemistry**: This branch is concerned with the properties and behaviors of inorganic compounds, which include minerals, metals, and non-metals. Topics in inorganic chemistry often include coordination compounds, the periodic table, and the study of elements and their compounds.
The specific curriculum might vary depending on the educational system or country, but these three branches are generally foundational in 12th-grade chemistry courses.