IIT Guwahati - Indian Institute of Technology

Physical sciences (physics and chemistry), life sciences (microbiology and biochemistry), together with applied mathematics and economics to produce, transform, transport, and properly use chemicals materials and energy. IIT Guwahati is a top class institute and every branch of it is quite good. Here is some of the insights of the college. Intake:- 70 (chemical)
Placements:
Placements of chemical engineering is very good. Average package:- 7 LPA ( chemical )
the highest package:- 15 - 20 LPA.

You can get admissions through GATE score in IIT'S.

You can refer the following link which will help you in comparing both the colleges in various aspects and this will help you in choosing the best one for you. https://www.shiksha.com/resources/college-comparison-109684-110645.

Old IITs are the best. They enhance your personality.

Off course IIT Guwahati because in IIT you will get more opportunities, better infrastructure, international platform, tech fest, faculty, and placement. If you are getting CSE in IIIT Hyderabad, then without doubt go for IIIT Hyderabad.

Hi,
Kindly predict your college in this college predictor. JEE Mains rank predictor is an online tool which predicts the candidate's rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs and other SFTIs. The rank predicted might not be accurate but it certainly does give an idea to the aspirant. Know your college admission chances based on your JEE Mains rank, home state, caste, gender, etc. here:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Yes you can and I suggest you should try it.

Yes, if you will get more than 8.5 GPA, then you can.