Biotechnology

Hi
No, you cannot do M.Tech in food tech as the requirements are completely different. There is no Masters+PhD (food proc) programme in any college as Ph.D requires clearing UGC NET exam. You should pursue M.Tech CS which will give you better packages.

Taking up a Ph.D will certainly boost your career prospects. There is no need to qualify NET exam for the same. You may need to appear for the entrance exam conducted by the institute. After M.Sc you will find opportunities in research laboratories, pharmaceutical companies, chemical industry etc. If you want to make a career in the research field you must appear for the NET+JRF exam. Normally candidates join any of the research firm as research assistants and prepare for the NET+JRF exam. On clearing this exam they are eligible for the pay scale under the UGC norms. After this they pursue a Ph.D along with their job.

Refer the link:
https://www.shiksha.com/engineering/colleges/b-tech-colleges-india

Yes, but you have to write JEE Mains.

The rank needed is below 3k.

For B.Tech, you need to qualify an entrance exam like JEE Mains and for M.Tech in IITs, GATE is must.

As per the eligibility for M.Tech, you must have done either Btech or (Bsc+Msc), then only you can apply for M.Tech program. Since you have done B.Sc in Biotechnology, you further need to pursue Msc in any specialisation of Biotechnology
Yes, you can do m.tech after b.sc in maths. sit for gate, score good and get admission to the college of your choice.

Placements depend on your interest. They give 100 percentage of placements but the salary and area of work do not match the requirements. So don't go on the paper record.

Hi
As per the eligibility for M.Tech, you must have done either B.Tech or (B.Sc+M.Sc), then only you can apply for M.Tech programme. Since you have done B.Sc. In Biotechnology, you further need to pursue M.Sc. In any specialisation of Biotechnology.

You should write PGCET or go through management seat.