CBSE 12th

What do you like the most? If engineering, seek admission in private colleges or if any other, please let me know.

If you are a general or an OBC candidate then extremely low chance. Else, if you belong to any other category then during the 5th or 6th round, you will surely get admission.

Hello Prahalad,
No, you should not spend 2 years for IIT after class 12th. Many students spend only a maximum of 1 year and that too only if they have the confidence of getting into IIT by doing hard work. Also, you need to answer the question, why did you spend a year after class 12th? When the companies come for placements, they always look for the continuity in studies.
So, choose wisely. If you can get admission in IIT then drop 1 year, if you cant then don't waste time as many have failed in JEE Advanced even after spending a year.

This has been already answered and a straight forward answer is no. Without mathematics, most of the institutes won't accept an applicant in BCA, B.Sc IT or CS courses. For more details, visit the respective institute's website and check their eligibility criteria.

Yes, you can. You need to score very good marks in class 12th.

I am also a class 12th student seeking for admission and I also got 81%. I think our destination is same.
I think we should wait for the DU cut-off, maybe in some courses like life sciences, we will get admission. Otherwise, we can find out some good private universities.

Here are some of the subjects which will be there in B.Sc course for the bio candidates:
Physics
Chemistry
Electronics
Statistics
Botany
Zoology
Biotechnology
Microbiology
Genetics