Career

Hello sudan vythis,
Thanks for asking.
That's really great that you have interest for physics and chemistry this much.
Because in these subjects you have too many career options available.
You can get into research field.
You can get into industrial research.
You can get a job in PSUs.
You can pursue lectureship.
& you can also pursue PhD.
Prepare for CSIR NET Exam. CSIR NET exam is conducted for the candidates who are willing to pursue your career further as a Junior Research Fellow or an Assistant Professor.
Check Jobs & vacancies after qualifying NET Exam https://scoop.eduncle.com/csir-recruitment-net-jrf here
I hope it will help you.
Best of luck.

You have following options to become Aeronautical Engineer on completion of 12 with PCM subjects:
(a) B.Tech in Aeronautical Engineering after +2 stage in PCM. You may refer to following link for list of engineering colleges offering Aeronautical Engineering: https://www.shiksha.com/top-aeronautical-engineering-colleges-in-india-rankingpage-49-2-0-0-0
(b) Aeronautical Engineering is an interdiscipinary degree. You can do M.Tech in Aeronautical Engineering after B.Tech in Mechanical or Electronics & other branches.
(c) You can join Aeronautical Society of India(AeSI). The AeSI is a professional body, devoted to advancement of aeronautical sciences and engineering in India. The AeSI conducts Associate Membership Examination twice a year. In which applicant has to clear minimum 10 level of Section-A and 10 level of Section- B with training, Internship & projects of this examination which is recognised by the Ministry of Education, at par with a Bachelors Degree (B.Tech) in Aerospace Engineering of University from India.

Hello,
After completing class 12th, you need to appear for various entrance examinations. Different entrance examination have different percentage requirement. You can check with the website of different entrance examination for exact figures. I would suggest, you should appear for JEE Mains and Advanced exam. These two entrance examinations provide admissions in IITs/ NITs and other government colleges, which are cost-effective.
I would also suggest, you should appear for individual state examinations (OJEE in Odisha, EAMCET in Andhra Pradesh/ Telangana, COMEDK in Karnataka, etc.). These exams also guarantee you good colleges and serve as a backup in case things don't end up the way you've planned for IIT-JEE.
Every state has its own share of good engineering colleges. So, don't underestimate or overlook them. They can prove to be vital. The more the entrance examinations you appear for, the more the options you will have for choosing colleges.
Certain private colleges like SRM, KIIT - Odisha, GITAM - Vishakhapatnam and ITER - Odisha conduct their own entrance examinations. You can opt for these as well.
After the results of those entrance examinations are announced, if you have a valid score and rank, you can attend the counselling procedure for the respective entrance examination. During the counselling procedure, you can select a college of your choice and the branch of engineering.
I hope it helps. If so, kindly, upvote this answer. If you've any further questions, kindly revert.