CBSE 12th

No, you can't study geology because the basic criteria is the candidate should past 10+2 with Science stream subjects from a recognised board minimum aggregate marks required in main science stream (PCM/B) is around 55% marks.

Hi,
Yes you can go for Rajasthan Government Engineering College and Malviya National Institute of Technology. Thank you and best of luck.

No, you are not eligible.

Hi Aishna,
No, you cannot take direct admission. You should clear their entrance exam and then GD/PI or other situation test taking by them.

The minimum eligibility for B.Sc. Computer Science is the candidate should complete 10+2 studies from a recognised Board of Education under a relevant stream are eligible to apply for the undergraduate courses and the admission is on merit basis. Merit list will be drawn up based on the applicants previous academic performances. 50% of seats are reserved for the Muslim minority.

Hello,
I hope you are doing well. Yes, there may be a chance that you will get CSE in average ranked private colleges also You can check the list of colleges including NITs and IIITs that you can get according to your marks and rank. Use Shiksha JEE college predictor:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993

Hello,
Hope you are doing well. You have a less chances for this college. Below are the cut off list for NIT Calicut and the ranches you can get with your marks:
Chemical Engineering, Opening rank - 979 closing rank - 7879 ( may vary )
Electrical and Electronics Engineering 4129 7656 ( may vary )
Production Engineering7724 9066.
All The Best.

Sorry. It's not possible as you are not a student of science and for the B.Sc. In Geology, it is required to have PCM or PCB in 12th.