Indian Institute of Science Education and Research, Mohali

Please refer to the link provided below for details regarding admissions in IISER. You can download their brochure which contains important details regarding admissions like application dates, dates for issue of the application form, submission of entrance exam, entrance exam dates, etc.
https://www.shiksha.com/college/indian-institute-of-science-education-research-iiser-chandigarh-22265

Please refer to the link provided below for details regarding top colleges offering a course in B.Sc.
https://www.shiksha.com/science/articles/top-10-bsc-msc-colleges-in-india-blogId-13473

Hello Raushan,
Please refer to the link to get more insights of the colleges and branches.
https://www.resonance.ac.in/reso/news/jee-advanced-branch-allotment.aspx
However, as per your rank, your chances are there to get these colleges.

Hello Ashutosh Jambukar,
Click on the link given below to know more about the admission process:
https://www.shiksha.com/science/course/integrated-bachelor-masters-of-science-indian-institute-of-science-education-research-iiser-chandigarh-25169
Hope this helps! All the best!

Hello,
Greetings from Shiksha!
Check out the official website of NITs i.e josaa.nic.in where in you will find the details of the participating institutes their cut-offs their opening and closing ranks, etc. Hope I have cleared your doubts. Good luck!

You may check the cut-off. Last year, you needed more than 85 for a seat in IISER.