IIT Eligibility

Hi Dharshan,
You can appear once in class 12th and then next year only, for JEE advance. Yes, you can get admission in IITs if you work hard and clear JEE Advanced.
Best of luck.

Yes, you are eligible you don't worry about it. You have a B.Tech degree so you can do easily this hence start preparing for GATE.

Eligibility criteria for NIT and IIT is 75% in class 12th board exams.

Please visit this link-
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/amp/jee-main-exam-pattern&ved=2ahUKEwiCx5eb3IbiAhVIuI8KHXa6BjUQFjAAegQIAhAB&usg=AOvVaw2nqB-mOziaqydu0OWItb7o&cf=1
I hope this will help you.

A valid GATE score is required to take admissions for M.Tech.

Hi,
Yes, you may get IIT-B but you have to make it confirm whether they accept backlog or not. Try to find out that information first.

Hi,
Please visit Shiksha.com's college predictor-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor. Ranks keeps on changing every year and differs from one branch to another and one college to another. If you fulfill the eligibility criteria of the specific institute, you may complete further admission formalities. For now, I would suggest you to first contact the institute officials of the shortlisted universities directly for specific eligibility criteria details.

The IITs prepared nine rank lists caste and reservation wise including general, OBC, SC, ST, PWD category. Last year, It was 67 marks for OBC applicants and 38 for SC/ ST category candidates
Feel free to ask Anything.

Please visit this site first
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwjd0NzModzhAhUZfSsKHfLtA6UQFjAAegQIBBAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H.

Yes, you can give Mains 3 times and Advanced 2 times.