CBSE 12th

This university accepts admission on the basis of CLAT rank only and not on the basis of your class 12th score. So, you have to post your CLAT rank.

Surely it is very difficult because it's first round cutoff is aprox 97-98%.

Focus on your class 12th marks first, only then you will be able to decide your Interest as per your marks and as per your eligibility from that marks.

The competitive exams are usually based on the concepts that one learns during the class 10th & class 12th in respect of mental ability, so it is important that one keeps in touch with them. Graduation concepts are different for different streams like B.Sc, BA, B.Com, BE. So, for MBA open tests to give a fair playing field to all the students the test is based on class 10th & class 12th standard concepts.

Yes, you are eligible for B.Sc in food technology as only 50 % is required for eligibility, but for admission in any college it depends upon cutoff.

You need at least 75 % in CBSE board or be in top 20 percentile of other boards. For SC / ST, this is 65 % for CBSE.

Yes, you can give particular subjects exam next year by giving improvement exam or else you can also give all subjects exam once again through improvement exam.

One of the eligibility criteria for B.Tech is 75% marks or 20 percentile in your state board in standard XII for general category students.

As far as concerned, this score is less to secure a seat there in this college.
You can follow the link to know more details:
https://www.shiksha.com/university/svvv-shri-vaishnav-vidyapeeth-vishwavidyalaya-indore-48873/admission