Providing a comprehensive list of all chapters for classes 6 to 12 across all subjects is quite extensive. However, I can give you a general overview of the subjects and major topics covered in each class:

Class 6:

Subjects:

1. Mathematics
2. Science
3. Social Science
4. English
5. Hindi

Class 7:

Subjects:

1. Mathematics
2. Science
3. Social Science
4. English
5. Hindi

Class 8:

Subjects:

1. Mathematics
2. Science
3. Social Science
4. English
5. Hindi

Class 9:

Subjects:

1. Mathematics
2. Science (Physics, Chemistry, Biology)
3. Social Science (History, Geography, Political Science, Economics)
4. English
5. Hindi

Class 10:

Subjects:

1. Mathematics
2. Science (Physics, Chemistry, Biology)
3. Social Science (History, Geography, Political Science, Economics)
4. English
5. Hindi

Class 11:

Subjects:

1. Mathematics
2. Physics
3. Chemistry
4. Biology
5. English
6. Hindi

Class 12:

Subjects:

1. Mathematics
2. Physics
3. Chemistry
4. Biology
5. English
6. Hindi

Please note that the specific chapters and topics covered in each subject can vary based on the curriculum adopted by different educational boards (e.g., CBSE, ICSE, State Boards). If you have a particular curriculum or board in mind, I can provide more detailed information. Additionally, the curriculum may be subject to updates or changes, so it’s always advisable to refer to the official curriculum documents or textbooks for the most accurate and up-to-date information.