Engineering

In Thapar, most of the students came from entrance exam conducted by Thapar University. While if you want to take admission in Thapar from your JEE Mains score card, then you have to secure at least 160 marks if you are from general category. If you want admission in Nirma then you just need to qual

Yes absolutely it is a good university. It provides really good course and environment. The facilities you will get there is world class.
Big business tycoons visit the campus and provide good package to students.
Almost 90% students get placed every year.

Following the NCERT book is the best option, if you are from CBSE. Other than those, you may follow S. L. Arora or H.C. Verma for Physics, ABC for Chemistry and R. S. Aggarwal or R.D. Sharma for Maths.

Yes, you can fill form of JEE Mains. If you qualify in JEE main then you have to take TC from B.Sc. Then only, you can take admission in any of the engineering college. Hope I have solved your query.

B.Tech is better than BCA. In B.Tech computer science and engineering, you will get more knowledge about various aspects of the programming language and computer architecture.