Cutoff for IIT is based on Jee Advanced marks. Minimum 75%aggregate marks in 12th is must to be eligible.

Cutoff for all IIT under ST Category and Home State/Other State based quotas below.

https://engineering.careers360.com/articles/jee-advanced-cutoff

Practice more and more from NCERTbooks and for advanced level we recommend to practice from HC Verma book and IE Irodov for Nunerical Physiscs . Solve previous year questions and analyze trend and pattern and revise such questions more.

Soove all doubts by joining coaching institutions like Aakash, PACE, Rao

MIT Chennai, SRM Chennai, IIeST Shibpur  RVCOE Bangalore, BIT Mesra, MIT Manipal,, LPU Phagwara, Amity University, IIST Thiruvanthapuram are all topnotch recommended colleges apart from IIT/NIT for Aeronautical /Aerospace engineering.

https://engineering.careers360.com/colleges/list-of-aerospace-engineering-colleges-in-india

Dear student.

Greetings.

Visit this link to know about the colleges you are eligible to take admission in with your rank in GATE.

https://engineering.careers360.com/gate-college-predictor

Thank you. All the best.

• 125-145 NITs as Shrinagar , Sikkim , Mizoram , Hamirpur and other lower NITs

• 140-200 NITs as Kurukshetra , Bhopal, Patna , Delhi ,Calicut ,

Yes definitely BBose is vakid for IIT and NIT and students must have 75%aggregate marks in 12th for eligibility to IIT and NIT. It is also well accredited and is comparable to NIOS Board. 

All details about board accreditation shared bekow.

http://www.bbose.org

Hello,

IIT Kanpur offer Bachelor of Science programme (B.S). It is a 4 year Undergraduate programme in Chemistry, Earth Sciences, Economics, Mathematics and Scientific Computing, Physics. 
Admission to the programme is done through JEE Advanced entrance exam. JEE Advanced is a national level entrance exam. You will first have to

Hello,
IIT Kanpur offers Bachelor of Science (B.S)  in Chemistry, Earth Sciences, Economics, Mathematics and Scientific Computing, Physics. It is a four year degree programme and admission is done through JEE Advanced exam.

http://www.iitk.ac.in/doaa/under-graduate-programme

Best colleges/universities for B.Sc are University of Delhi, Jamia Milia Islamia, Christ University Bangalore, BHU, etc.