Dual

It depends on what you want to do. If you want to do Master's degree or go for higher education then integrated M.Com will be great. But if you are willing to join professional degrees like CA, CMA or CS then you should do B.Com (Hons).

Guru Nanak Dev University has a rich placement history. Also, dual integrated courses have seen a steady rise in placement. With that, all being said placement also depends upon the quality of skills that you acquire from the degree and how well you give the interview.

It is better not to join integrated course of any specialization. Do it separately.

You cannot get the same course in a single year. You have to go for any single course otherwise both the degree will clash everywhere and you will get yourself in problem. These kind of things will impact bad on your future progress. Hope you understand it better. Thanks.

IIT, Bhubaneshwar is better than IIT Dhanbad. I was getting mechanical in IIT Dhanbad but still preferred IIT Bhubaneshwar Civil more.

There is no such difference between these two courses, both these courses are of 5 years (10 semester). But B.A. LL.B. Honours students are offered courses which have been designed and oriented towards practically and hands on exposure in different domains like International Law, Constitutional Law, Corporate Law, General Law. But these courses are subject to different colleges/universities whether they offer or not.

Yes, Integrated B.Ed + M.Ed is offered by Sambalpur University.
For details refer:https://www.shiksha.com/teaching-education/course/integrated-b-ed-m-ed-sambalpur-university-285716