CAT

They give less weightage to section wise cutoff. Usually, colleges look for full percentile you get in the exam.

Yes you can get admission. There are colleges who can consider going with this score like riim, pibm, etc. I have friends who study in this college and have the similar percentage. For more information, comment below.

Chances are quite less. But you can still try and wait for their call.

There are very less chances for this. But you can apply to others colleges where you can get admission with this percentage like bimm, indira, pibm, riim, itm navi Mumbai, etc.

You can apply for colleges like: bimm, isbs, riim, pibm, itm navi Mumbai etc.

https://www.shiksha.com/b-tech/jee-main-exam
Refer the link.

Your percentile is quite decent. With such scores you have following options-
Great lakes
IMT Ghaziabad
Tapmi
GIM
BIM, Trichy

With 80 percentile in CAT General category, don't rush for MBA, get work ex and re-appear for CAT.

Minimum qualifying CAT 2018 overall percentile is 80. Minimum qualifying CAT 2018 sectional percentile in each of the 3 sections is 70. Above 90% marks in Class 10th will get you to top rating of 10 (Rating score A) irrespective of your stream. Top rating of 10 (Rating score B) for Class 12th will vary.