Finding previous year SAT questions for specific SAT Subject Test subjects like Chemistry or Physics can be a valuable resource for test preparation. Here are some ways you can access these questions:

1. Official SAT Subject Test Guides:
- The College Board, the organization that administers the SAT, publishes official study guides for each SAT Subject Test, including Chemistry and Physics.
- These guides contain real previous SAT Subject Test questions, along with detailed explanations.
- You can purchase these study guides from bookstores or online retailers.

2. College Board Website:
- The College Board provides a range of free resources on their website, including sample questions, practice tests, and answer explanations.
- You can visit the official College Board website and search for the specific SAT Subject Test you are interested in, such as Chemistry or Physics.
- These resources will give you a good understanding of the types of questions that appear on the tests.

3. EduRev:
- EduRev is an online educational platform that offers a wide range of study materials, including previous year SAT questions for various subjects.
- You can visit the EduRev website and search for the specific SAT Subject Test you are preparing for, such as Chemistry or Physics.
- EduRev provides access to a large database of previous year questions, allowing you to practice and familiarize yourself with the specific content and format of the test.

4. Tutoring Centers and Test Prep Companies:
- Tutoring centers and test prep companies often provide study materials and resources for SAT Subject Tests.
- You can inquire with these centers or companies to see if they have access to previous year SAT questions for Chemistry or Physics.
- They may offer practice tests or study materials that include real SAT Subject Test questions.

It is important to note that while practicing previous year questions can be helpful, it is equally important to study the underlying concepts and content of the specific SAT Subject Test. Understanding the subject matter thoroughly will enable you to answer questions accurately and efficiently on test day.