No, as a 2022 passout, you are not eligible to apply for the IISER Aptitude Test (IAT) 2025. The IAT is only for students who passed Class XII or equivalent in 2023, 2024, or 2025.

If you're interested in studying at an IISER, you can consider pursuing a bachelor's degree and then applying for IISER's Masters or integrated PhD programs through exams like IIT-JAM, JEST, or UGC-NET/GATE.

Check out IISER eligibility criteria