Class 11

As you are a SC category student, you will need to score at least 250+ to get admission in IIT.
All the best.

University Physics by Resnick and Halliday
University Physics by Sears Zemansky
Irodov's Problem in Physics and Solution
Calculus by GP Thomas
Loney's Trigonometry and Coordinate Geometry
Hall and Knight's Elementary Algebra and Higher Algebra
Organic Chemistry by Morrison Boyd.

These are best books for class 11th physics, Chemistry & Maths :
1. Physics : NCERT +Pradeep/Abc
2. Chemistry : NCERT + Pradeep/Abc
3. Maths : NCERT + R. D. Sharma/K. C. Sinha
Hope you got your answer.

Hi,
Best book for class 11th Physics, Chemistry and Maths is NCERT. Other than this, you can use any reference book such as Pradeep's or ABC. For Maths, you can refer RD Sharma. Hope, you got your answer.

Hi,
In this case, you can take commerce along with Maths in class 11th, and in this way, you can pursue your interest. Hope you got your answer.

It depends on your interest. If you are interested to go with IIT or NIT, then you should go for Allen Institute Kotak, otherwise you can go with your schooling.

Yes, sure you can. But what you mentioned in your first line should be taken care of I. e. , for clearing Mains, your basics must be very strong and for that, your have NCERT books which should be mugged up really well. So, once your basics will be clear JEE Mains is not that of a big deal.

Hi there!
For enrolling in NIOS Board, you can directly visit their website, fill out the form and pay the fees. They have 2-3 batches every year for students. Hope you got your answer.

Go through the link below for detailed eligibility:
https://www.shiksha.com/design/exams/nift-entrance-exam.

Hi,
This will entirely depend on the job sector you want to be in. If you want to make your career in the commerce, accounting and finance field, you can choose a course in one of these subjects. Finance is a good sector. Japan, Hong Kong, Singapore, etc., are all financial capitals so you may have good opportunities ahead. Study as per your choice and interest, the exact course you want to study depends on your personal choice.