IIT Dhanbad (ISM) - Indian Institute of Technology (ISM)

 I would Suggest BHU as it is a very reputed university. M.Sc. Chemistry is also better in BHU. Placements are equally god in NHU.

It depends on the round on which you are allocated a seat. For students who got seat in 2nd round are required to report on 4th or 5th July. The whole schedule can be downloaded from
https://josaa.nic.in/webinfocms/Handler/FileHandler.ashx?i=File&ii=156&iii=Y

IIST - the fact that most of its students are eventually absorbed in ISRO. So, whats most important is to choose an institute which provides you a wide range of career options. It immensely increases your chances to succeed as an young undergrad. To be very frank, you won't be having much career choices if you choose to join IIST. IIT Dhanbad is doing great among the new ones. Please do not get demotivated by its location. People often comment without even knowing the inside story. I can fairly assure you that you would be having a whole lot of exciting career opportunities here in IIT Dhanbad. Rest is your decision.

You can compare both these colleges with the help of this amazing tool.
https://www.shiksha.com/resources/college-comparison.

The package can range around 12-20 Lacs pa. The website of iit you are in/aiming for contains all the official and exact placement records.

It all depends on your field of interest, if you love to create new electronics applications then take ECE in IIT-Dhanbad, and if you love to programming, then take CSE in IIT-Jodhpur.

In my point of view, IIT Dhanbad is better as it is an institute of national importance, whereas the BITS Pilani is no less than it, but being a government institute it will have some of its own reputation, which makes your education much worth it there. But, BITS Pilani can compete against some institutes of national importance, so think and decide wisely. All the best.

IIT Dhanbad , not only because of the brand IIT but also excellent faculty , lectures from renowned industry people, bureaucrats , special attention on overall personality development through various activities and guest lectures .