Exam

You can check the previous year results to get an idea of the maximum score

Yes, you have a bright chance.

The entrance exams might be conducted as per the situation.

Hi Gaytri, If you are from general category, it seems quite difficult to get any NIT with 92 percentile. But, why don't you keep plan B on your mind. You should compare other private universities also. Nowadays private universities are also equally good as IITs and NITs. Let me tell you the list of good institutions where you can do comparison and can appear in their National level exam.
1) Lovely Professional University, Punjab. For B.Tech Biotech your first choice should be LPU.
2) VIT
3) SRM
4) BITS Pilani.
5) SNU
6) Amity University. All the best for your future.