Colleges in Jaipur

NIOS is more flexible in subjects as compared to CBSE and yes, it is better to choose NIOS over CBSE.

I guess, it's 8 AM to 6 PM.

According to the last year's cut-off, you will get mechanical and ECE and this year also your chances are high with this percentile.

If you are thinking for greater opportunities and good jobs, I would highly recommend you to pursue your class 12th from any means, but since you are thinking about NIOS, it would be a beneficial thing to do.

Jaipur National University is good for studying BA LLB (Hons.) and has good placement records.BA-LLB course combines a Bachelor's degree course in Arts with Bachelors in Law. The syllabus for this program as the name suggests includes enriching curriculum in Art subjects.
The duration of the course BA-LLB at JNU, Jaipur is five years. Each year comprises of two semesters. A student who successfully completes the five years of BA-LLB course shall be eligible for the award of both Degrees of Bachelors of Arts and Bachelors in Law.

What is your question?

Chemical at NIT-Jaipur will be better in terms of what features you have mentioned in your question.

According to my knowledge, there is no entrance exam conducted, but marks of class 12 are taken as judging criterion for admission and for more details, go through the official site of this university.

As you said that you have scored 79.11 percentile and you belong to general category, sorry to say but 90.31 percentile is the cut off for JEE Mains, so keep your hopes low.