Tamil Nadu Agricultural University

Yes, you can definitely get admission for B.Tech Food process and Engineering with 254 marks in PCB. Last year, the Cut-off for this course is 75%.

I think no, because for agriculture, Biology is needed.

Hi Jaid,
Eligibility Criteria:
Candidate must have passed a bachelors degree or its equivalent qualification from a recognized university.
Admission Guidelines:
Admissions are made by entrance exam both by Jawaharlal Nehru University, New Delhi and TNAU.
Regards.

The chances are less, but you can still hope to get a seat.