CBSE 10th

No, first you have to pass class 12th exam. Then only, you will eligible for this.

Yes, this certificate will be useful in taking admission bin AUCET. You can use your A certificate.

Yes, but they have special seat allotment.
https://www.shiksha.com/university/Andhra-university-Visakhapatnam/aucet-exam-counselling
Check out this link for more information.

Hello Abdul, If you like to choose any stream related to Science, you have to go for PCM or PCB (P-physics, C- chemistry, B-Biology, M-mathematics) after completing 10th. Once you have chosen and completed 10+2 classes, you can choose B.Sc. Or B tech courses related to Science according to your interest.

Leave all the tensions and excitements of JEE Mains result behind. Sprucing up self-belief will help you to bolster your position in this critical period. Remind yourself of the things you do well and ensure that your positivity. For IIT, you must be really consistent in your studies. Join a weekend coaching institute (VMC is best for cracking JEE exam) and prepare for 2 years and forget everything. Joining a coaching and simultaneously attending school is a bit hectic, but you will definitely get used to it within a month. Work hard on mathematics and physics. You must be keen on solving numericals and get your concepts crystal clear.

If you wants to get into IIMs, then you have to give CAT exam and also need to score good in the exam at least 99 percentile is required for get into IIMS.

No, you can't give this exam after class 10th. You have to complete your graduation for this exam.
Good luck.

For getting admission here, you should have completed your class 12th. After class 10th, you can't get admission in college.
Good luck.

If you get 90% in class 10th, or more than that, yes you can definitely get admission in Government Polytechnic College-Pune.